4 files changed, 1350 insertions, 0 deletions
diff --git a/docs/img/file-content-encryption.svg b/docs/img/file-content-encryption.svg
new file mode 100644
index 0000000..38a6f6b
--- /dev/null
+++ b/docs/img/file-content-encryption.svg
@@ -0,0 +1,516 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="183.14586mm"
+   height="74.500015mm"
+   viewBox="0 0 648.94201 263.97642"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="file-content-encryption.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker5544"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path5546"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker9033"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path9035"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker8949"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:collect="always">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path8951" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker8631"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path8633"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker8559"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:collect="always">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path8561" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker8493"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path8495"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#aa00d4;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker8433"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:collect="always">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path8435" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.4"
+     inkscape:cx="209.93662"
+     inkscape:cy="128.77455"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     showguides="false"
+     inkscape:window-width="1920"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     fit-margin-top="2"
+     fit-margin-left="2"
+     fit-margin-right="2"
+     fit-margin-bottom="2"
+     inkscape:snap-bbox="true"
+     inkscape:bbox-nodes="false"
+     inkscape:snap-bbox-midpoints="false">
+    <inkscape:grid
+       type="xygrid"
+       id="grid4153"
+       dotted="true"
+       units="mm"
+       spacingx="3.543307"
+       spacingy="3.5433069"
+       originx="-58.710531"
+       originy="-676.77163" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-58.710528,-111.61407)">
+    <rect
+       style="opacity:1;fill:#b0b0b0;fill-opacity:1;stroke:none;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4273-2"
+       width="202.04813"
+       height="229.68066"
+       x="498.51782"
+       y="138.82323" />
+    <rect
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4267-1"
+       width="180.77991"
+       height="21.25984"
+       x="509.90225"
+       y="151.34044" />
+    <rect
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.99999988;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4269-7"
+       width="180.77988"
+       height="106.29918"
+       x="509.15195"
+       y="230.31494" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="562.84875"
+       y="132.75323"
+       id="text4155-7"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-2"
+         x="562.84875"
+         y="132.75323"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">myfile.txt</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="576.00201"
+       y="166.35579"
+       id="text4155-88-3"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.9998029)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7"
+         x="576.00201"
+         y="166.35579"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">File ID</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="567.89215"
+       y="222.81044"
+       id="text4155-88-4-5"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.9998029)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-8-2"
+         x="567.89215"
+         y="222.81044"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Block N</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="590.19763"
+       y="246.77895"
+       id="text4155-88-3-5"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3"
+         x="590.19763"
+         y="246.77895"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">IV</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="530.06659"
+       y="306.5853"
+       id="text4155-88-3-5-2"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-1"
+         x="530.06659"
+         y="306.5853"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">authentication tag</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="552.05615"
+       y="287.28772"
+       id="text4155-88-3-5-5"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-11"
+         x="552.05615"
+         y="287.28772"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Ciphertext +</tspan><tspan
+         sodipodi:role="line"
+         x="552.05615"
+         y="306.04141"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px"
+         id="tspan10041" /></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:60px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:45.09999847px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="216.14174"
+       y="272.83463"
+       id="text8326"
+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan8328"
+         x="216.14174"
+         y="272.83463" /></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:15.00295734px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="-199.48254"
+       y="594.10767"
+       id="text8334"
+       sodipodi:linespacing="125%"
+       transform="matrix(0,-0.9998029,1.0001971,0,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan8336"
+         x="-199.48254"
+         y="594.10767">...</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:15.00295734px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="-358.76984"
+       y="594.10767"
+       id="text8334-6"
+       sodipodi:linespacing="125%"
+       transform="matrix(0,-0.9998029,1.0001971,0,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan8336-8"
+         x="-358.76984"
+         y="594.10767">...</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect8358"
+       width="180.77988"
+       height="85.039352"
+       x="509.15195"
+       y="251.57477" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="119.28683"
+       y="301.50504"
+       id="text4155-88-3-5-5-3"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.9998029)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-11-3"
+         x="119.28683"
+         y="301.50504"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Plaintext</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect8358-5"
+       width="180.77986"
+       height="63.77951"
+       x="66.297142"
+       y="265.78934" />
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect3336-9-4-2-0-1"
+       width="127.60939"
+       height="21.259842"
+       x="296.05573"
+       y="273.9592"
+       ry="10.629921" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="306.63794"
+       y="289.41443"
+       id="text4155-6-5-7-9-1"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.9998029)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-3-0-7-6-8"
+         x="306.63794"
+         y="289.41443"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">AES-256-GCM</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="101.36021"
+       y="245.00774"
+       id="text4155-8-6"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.9998029)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-1-5"
+         x="101.36021"
+         y="245.00774"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">/dev/urandom</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4271-5"
+       width="180.77991"
+       height="21.25984"
+       x="67.576042"
+       y="229.28419" />
+    <path
+       style="opacity:1;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:0.99999988;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8433)"
+       d="m 253.93328,240.94489 249.90165,0"
+       id="path8425"
+       inkscape:connector-curvature="0" />
+    <path
+       style="opacity:1;fill:#aa00d4;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8493)"
+       d="m 333.68912,240.94489 0,26.57479"
+       id="path8485"
+       inkscape:connector-curvature="0" />
+    <ellipse
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="path8737"
+       cx="374.27438"
+       cy="240.94487"
+       rx="5.3170562"
+       ry="5.3149605" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8559)"
+       d="m 503.70354,161.22048 -128.20852,0 0,106.29922"
+       id="path8551"
+       inkscape:connector-curvature="0" />
+    <ellipse
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="path8737-5"
+       cx="386.95145"
+       cy="240.94487"
+       rx="5.3170557"
+       ry="5.31496" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8631)"
+       d="m 562.32255,219.68505 -175.46287,0 0,47.83465"
+       id="path8623"
+       inkscape:connector-curvature="0" />
+    <ellipse
+       style="opacity:1;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="path8737-56"
+       cx="333.64691"
+       cy="241.05405"
+       rx="3.1063631"
+       ry="3.1051385" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;"
+       x="423.86295"
+       y="215.17522"
+       id="text4155-88-4-5-8"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.9998029)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-8-2-7"
+         x="423.86295"
+         y="215.17522"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px;fill:#000000;fill-opacity:1;">N</tspan></text>
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:0.99999988;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8949)"
+       d="m 250.75992,283.38022 40.39275,0.0845"
+       id="path8941"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker9033)"
+       d="m 429.39614,283.4646 74.43879,0"
+       id="path9025"
+       inkscape:connector-curvature="0" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="319.01462"
+       y="354.56906"
+       id="text4155-8-2"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-1-2"
+         x="319.01462"
+         y="354.56906"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Master key</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4271-4"
+       width="106.3383"
+       height="21.300985"
+       x="306.26349"
+       y="339.90607" />
+    <path
+       style="opacity:1;fill:#000000;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker5544)"
+       d="m 361.41732,336.31276 0,-35.99645"
+       id="path5536"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       inkscape:connector-curvature="0"
+       d="m 375.14415,313.30988 c -2.19348,0 -3.97122,1.77773 -3.97122,3.97121 0,0.30404 0.0341,0.59878 0.0993,0.88266 l -6.07006,6.06851 0,0.9928 0.9928,0.9928 1.98561,0 0.99281,-0.9928 0,-0.9928 0.9928,0 0,-0.9928 0.9928,0 0,-0.9928 1.9856,0 1.09829,-1.09829 c 0.29008,0.0666 0.59102,0.10233 0.90128,0.10233 2.19347,0 3.9712,-1.77773 3.9712,-3.9712 0,-2.19348 -1.77928,-3.96967 -3.9712,-3.96967 z m -3.98518,6.95116 -4.96401,4.96402 0,-0.9928 4.96401,-4.96402 0,0.9928 z m 4.96401,-2.9784 c -0.54759,0 -0.9928,-0.44521 -0.9928,-0.9928 0,-0.54759 0.44521,-0.9928 0.9928,-0.9928 0.5476,0 0.99281,0.44521 0.99281,0.9928 0,0.54759 -0.44521,0.9928 -0.99281,0.9928 z"
+       id="path7910"
+       style="fill:#ffcc00;fill-opacity:1;stroke:none;stroke-opacity:1" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#aa00d4;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="313.90033"
+       y="260.28745"
+       id="text4155-88-3-5-0"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-8"
+         x="313.90033"
+         y="260.28745"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px;fill:#aa00d4">IV</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#37abc8;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="393.54901"
+       y="259.38974"
+       id="text4155-88-3-5-0-3"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-8-5"
+         x="393.54901"
+         y="259.38974"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px;fill:#37abc8">AAD</tspan></text>
+  </g>
+</svg>
diff --git a/docs/img/file-name-encryption.svg b/docs/img/file-name-encryption.svg
new file mode 100644
index 0000000..45222e2
--- /dev/null
+++ b/docs/img/file-name-encryption.svg
@@ -0,0 +1,400 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="182.44499mm"
+   height="29.394854mm"
+   viewBox="0 0 646.45862 104.15498"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="file-name-encryption.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker14911"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path14913"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker9315"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path9317" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker8949"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:collect="always">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path8951" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker8559"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:collect="always">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path8561" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4311"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend-9"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4311-4"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend-6"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4311-6"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker8949-8"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:collect="always">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path8951-2" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="2.8"
+     inkscape:cx="290.22759"
+     inkscape:cy="52.741737"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     showguides="false"
+     inkscape:window-width="1920"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     fit-margin-top="2"
+     fit-margin-left="2"
+     fit-margin-right="2"
+     fit-margin-bottom="2"
+     inkscape:snap-bbox="true"
+     inkscape:bbox-nodes="false"
+     inkscape:snap-bbox-midpoints="false">
+    <inkscape:grid
+       type="xygrid"
+       id="grid4153"
+       dotted="true"
+       units="mm"
+       spacingx="3.543307"
+       spacingy="3.5433069"
+       originx="-116.36615"
+       originy="-722.62329" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-116.36614,-225.58383)">
+    <rect
+       style="opacity:1;fill:#b0b0b0;fill-opacity:1;stroke:none;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4273-2"
+       width="202.06071"
+       height="70.915802"
+       x="553.67743"
+       y="251.7364" />
+    <rect
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4267-1"
+       width="180.79115"
+       height="21.25984"
+       x="565.06256"
+       y="260.98331" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.02054596px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66544342px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="615.98376"
+       y="244.4257"
+       id="text4155-7"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0002283,0.99977176)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-2"
+         x="615.98376"
+         y="244.4257"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00342369px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Directory X</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.02054596px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66544342px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="603.37323"
+       y="275.30154"
+       id="text4155-88-3"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0002283,0.99977176)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7"
+         x="603.37323"
+         y="275.30154"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00342369px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">gocryptfs.diriv</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.02054596px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66544342px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="262.2395"
+       y="244.6987"
+       id="text8326"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0002283,0.99977178)"><tspan
+         sodipodi:role="line"
+         id="tspan8328"
+         x="262.2395"
+         y="244.6987" /></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect3336-9-4-2-0-1"
+       width="127.61733"
+       height="21.259842"
+       x="303.21915"
+       y="293.23734"
+       ry="10.629921" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.02054596px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66544342px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="316.79153"
+       y="309.39807"
+       id="text4155-6-5-7-9-1"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0002283,0.99977177)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-3-0-7-6-8"
+         x="316.79153"
+         y="309.39807"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00342369px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">AES-256-EME</tspan></text>
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8559)"
+       d="m 558.97059,270.16733 -169.78791,0.0896 0,17.75633"
+       id="path8551"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="ccc" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:0.99999988;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8949)"
+       d="m 257.92054,303.7971 40.39527,0.0845"
+       id="path8941"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <rect
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4267-1-5"
+       width="127.61729"
+       height="21.259859"
+       x="123.95276"
+       y="293.23734" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.02054596px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66544342px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="146.35033"
+       y="309.52994"
+       id="text4155-88-3-1"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0002283,0.99977177)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3"
+         x="146.35033"
+         y="309.52994"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00342369px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">&quot;letter.doc&quot;</tspan></text>
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:0.99999982;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker8949-8)"
+       d="m 435.14323,303.81321 19.07004,0.0844"
+       id="path8941-5"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <rect
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4267-1-0"
+       width="180.79115"
+       height="21.25984"
+       x="565.17651"
+       y="293.23734" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.02054596px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66544342px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="573.47998"
+       y="308.07574"
+       id="text4155-88-3-0"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0002283,0.99977176)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-0"
+         x="573.47998"
+         y="308.07574"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00342369px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">lrpyui0m-ypX4u0PNJ...</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="304.04675"
+       y="247.91684"
+       id="text4155-8-2"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-1-2"
+         x="304.04675"
+         y="247.91684"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Master key</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4271-4"
+       width="106.3383"
+       height="21.300985"
+       x="291.30774"
+       y="233.17044" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:0.99999994;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker9315)"
+       d="m 340.82535,258.96369 0,29.21511"
+       id="path4825"
+       inkscape:connector-curvature="0" />
+    <path
+       inkscape:connector-curvature="0"
+       d="m 332.00759,267.10127 c -2.19348,0 -3.97122,1.77773 -3.97122,3.97121 0,0.30404 0.0341,0.59878 0.0993,0.88266 l -6.07006,6.06851 0,0.9928 0.9928,0.9928 1.98561,0 0.99281,-0.9928 0,-0.9928 0.9928,0 0,-0.9928 0.9928,0 0,-0.9928 1.9856,0 1.09829,-1.09829 c 0.29008,0.0666 0.59102,0.10233 0.90128,0.10233 2.19347,0 3.9712,-1.77773 3.9712,-3.9712 0,-2.19348 -1.77928,-3.96967 -3.9712,-3.96967 z m -3.98518,6.95116 -4.96401,4.96402 0,-0.9928 4.96401,-4.96402 0,0.9928 z m 4.96401,-2.9784 c -0.54759,0 -0.9928,-0.44521 -0.9928,-0.9928 0,-0.54759 0.44521,-0.9928 0.9928,-0.9928 0.5476,0 0.99281,0.44521 0.99281,0.9928 0,0.54759 -0.44521,0.9928 -0.99281,0.9928 z"
+       id="path7910"
+       style="fill:#ffcc00;fill-opacity:1;stroke:none;stroke-opacity:1" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#aa00d4;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="456.66174"
+       y="266.66168"
+       id="text4155-88-3-5-0"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-8"
+         x="456.66174"
+         y="266.66168"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px;fill:#aa00d4">IV</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect3336-9-4-2-0-1-0"
+       width="74.836861"
+       height="21.259842"
+       x="459.0206"
+       y="293.23734"
+       ry="10.629921" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.02054596px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66544342px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="468.30588"
+       y="309.39807"
+       id="text4155-6-5-7-9-1-8"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0002283,0.99977176)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-3-0-7-6-8-2"
+         x="468.30588"
+         y="309.39807"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00342369px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Base64</tspan></text>
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:0.99999982;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker14911)"
+       d="m 537.89913,303.81321 19.07004,0.0844"
+       id="path8941-5-6"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+  </g>
+</svg>
diff --git a/docs/img/folders-side-by-side.png b/docs/img/folders-side-by-side.png
new file mode 100644
index 0000000..92119f8
--- /dev/null
+++ b/docs/img/folders-side-by-side.png
diff --git a/docs/img/master-key.svg b/docs/img/master-key.svg
new file mode 100644
index 0000000..bfc404a
--- /dev/null
+++ b/docs/img/master-key.svg
@@ -0,0 +1,434 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="158.81688mm"
+   height="62.826447mm"
+   viewBox="0 0 562.73697 222.61338"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="master-key.svg">
+  <defs
+     id="defs4">
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker13890"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path13892" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker13078"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path13080"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="marker12104"
+       style="overflow:visible"
+       inkscape:isstock="true"
+       inkscape:collect="always">
+      <path
+         id="path12106"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
+       id="marker11348"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow1Mend"
+       inkscape:collect="always">
+      <path
+         inkscape:connector-curvature="0"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         id="path11350" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         id="path4311"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend-9"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4311-4"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+    <marker
+       inkscape:stockid="Arrow1Mend"
+       orient="auto"
+       refY="0"
+       refX="0"
+       id="Arrow1Mend-6"
+       style="overflow:visible"
+       inkscape:isstock="true">
+      <path
+         inkscape:connector-curvature="0"
+         id="path4311-6"
+         d="M 0,0 5,-5 -12.5,0 5,5 0,0 Z"
+         style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1pt;stroke-opacity:1"
+         transform="matrix(-0.4,0,0,-0.4,-4,0)" />
+    </marker>
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.979899"
+     inkscape:cx="273.79956"
+     inkscape:cy="88.979971"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="true"
+     showguides="true"
+     inkscape:window-width="1920"
+     inkscape:window-height="1016"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     fit-margin-top="2"
+     fit-margin-left="2"
+     fit-margin-right="2"
+     fit-margin-bottom="2">
+    <inkscape:grid
+       type="xygrid"
+       id="grid4153"
+       dotted="true"
+       units="mm"
+       spacingx="3.543307"
+       spacingy="3.543307"
+       originx="-16.196071"
+       originy="-900.13387" />
+  </sodipodi:namedview>
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-16.196072,70.385088)">
+    <rect
+       style="opacity:1;fill:#b0b0b0;fill-opacity:1;stroke:none;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4273"
+       width="202.04276"
+       height="144.27431"
+       x="23.745562"
+       y="0.86738396" />
+    <rect
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4269"
+       width="180.77509"
+       height="21.300983"
+       x="34.379395"
+       y="14.30587" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="70.482063"
+       y="-8.3704147"
+       id="text4155"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157"
+         x="70.482063"
+         y="-8.3704147"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">gocryptfs.conf</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="69.708466"
+       y="-47.437698"
+       id="text4155-8"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-1"
+         x="69.708466"
+         y="-47.437698"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">User password</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="54.610546"
+       y="29.583706"
+       id="text4155-88-4"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-8"
+         x="54.610546"
+         y="29.583706"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Scrypt parameters</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4271"
+       width="201.96851"
+       height="21.259884"
+       x="23.782686"
+       y="-62.798473" />
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect3336-9-4-2"
+       width="81.82563"
+       height="23.164824"
+       x="265.05551"
+       y="-62.515182"
+       ry="11.582412" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="282.32047"
+       y="-47.050331"
+       id="text4155-6-5-7"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-3-0-7"
+         x="282.32047"
+         y="-47.050331"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Scrypt</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect3336-9-4-2-0"
+       width="127.60599"
+       height="21.300985"
+       x="291.36865"
+       y="99.314758"
+       ry="10.650493" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="302.24756"
+       y="114.65296"
+       id="text4155-6-5-7-9"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-3-0-7-6"
+         x="302.24756"
+         y="114.65296"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">AES-256-GCM</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="477.88318"
+       y="115.52155"
+       id="text4155-8-2"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-1-2"
+         x="477.88318"
+         y="115.52155"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Master key</tspan></text>
+    <rect
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4271-4"
+       width="106.3383"
+       height="21.300985"
+       x="465.00812"
+       y="100.67143" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#Arrow1Mend-6)"
+       d="m 423.93541,110.05995 33.89144,-0.0155"
+       id="path4296-2"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cc" />
+    <path
+       inkscape:connector-curvature="0"
+       d="m 355.03935,33.380214 c -2.19348,0 -3.97122,1.77773 -3.97122,3.97121 0,0.30404 0.0341,0.59878 0.0993,0.88266 l -6.07006,6.06851 0,0.9928 0.9928,0.9928 1.98561,0 0.99281,-0.9928 0,-0.9928 0.9928,0 0,-0.9928 0.9928,0 0,-0.9928 1.9856,0 1.09829,-1.09829 c 0.29008,0.0666 0.59102,0.10233 0.90128,0.10233 2.19347,0 3.9712,-1.77773 3.9712,-3.9712 0,-2.19348 -1.77928,-3.96967 -3.9712,-3.96967 z m -3.98518,6.95116 -4.96401,4.96402 0,-0.9928 4.96401,-4.96402 0,0.9928 z m 4.96401,-2.9784 c -0.54759,0 -0.9928,-0.44521 -0.9928,-0.9928 0,-0.54759 0.44521,-0.9928 0.9928,-0.9928 0.5476,0 0.99281,0.44521 0.99281,0.9928 0,0.54759 -0.44521,0.9928 -0.99281,0.9928 z"
+       id="path7910"
+       style="fill:#ffcc00;fill-opacity:1;stroke:none;stroke-opacity:1" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#aa00d4;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="264.69296"
+       y="77.401039"
+       id="text4155-88-3-5-0"
+       sodipodi:linespacing="125%"
+       transform="matrix(1.000197,-5.3086121e-4,5.3064318e-4,0.99980276,0,0)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-8"
+         x="264.69296"
+         y="77.401039"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px;fill:#aa00d4">IV</tspan></text>
+    <rect
+       style="opacity:1;fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.99999982;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       id="rect4269-7"
+       width="180.77988"
+       height="61.370972"
+       x="34.376999"
+       y="71.948822" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="41.581425"
+       y="64.413086"
+       id="text4155-88-4-5"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-8-2"
+         x="41.581425"
+         y="64.413086"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Encrypted master key</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="116.72441"
+       y="88.381607"
+       id="text4155-88-3-5"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3"
+         x="116.72441"
+         y="88.381607"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">IV</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="55.701641"
+       y="126.48744"
+       id="text4155-88-3-5-2"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-1"
+         x="55.701641"
+         y="126.48744"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">authentication tag</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.01774597px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.66333771px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="77.074265"
+       y="107.18988"
+       id="text4155-88-3-5-5"
+       sodipodi:linespacing="125%"
+       transform="scale(1.0001971,0.99980293)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-9-7-3-11"
+         x="77.074265"
+         y="107.18988"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">Ciphertext +</tspan><tspan
+         sodipodi:role="line"
+         x="77.074265"
+         y="125.94358"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.00295734px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px"
+         id="tspan10041" /></text>
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
+       d="m 34.412609,91.620715 180.708661,0"
+       id="path10326"
+       inkscape:connector-curvature="0" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker11348)"
+       d="m 219.68504,110.37566 67.32284,0"
+       id="path11340"
+       inkscape:connector-curvature="0" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:0.99999994;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker12104)"
+       d="m 350.7874,-50.101017 14.17323,0 0,145.578227"
+       id="path12096"
+       inkscape:connector-curvature="0" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:90.10359192px;line-height:125%;font-family:Arial;-inkscape-font-specification:'Arial Bold';letter-spacing:67.72786713px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="370.46933"
+       y="46.17672"
+       id="text4155-6-5-7-91"
+       sodipodi:linespacing="125%"
+       transform="scale(0.99921742,1.0007832)"><tspan
+         sodipodi:role="line"
+         id="tspan4157-3-0-7-1"
+         x="370.46933"
+         y="46.17672"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:15.01726532px;font-family:sans-serif;-inkscape-font-specification:sans-serif;letter-spacing:0px">KEK</tspan></text>
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker13078)"
+       d="m 219.68504,81.496055 99.2126,0 0,14.17322"
+       id="path13070"
+       inkscape:connector-curvature="0" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker13890);marker-mid:"
+       d="m 230.31497,-53.149629 28.34645,0"
+       id="path13880"
+       inkscape:connector-curvature="0" />
+    <path
+       style="opacity:1;fill:none;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker-end:url(#marker13078);marker-mid:"
+       d="m 219.68504,24.803127 85.03938,0 0,-60.236221"
+       id="path13882"
+       inkscape:connector-curvature="0" />
+  </g>
+</svg>