diff options
| author | Jakob Unterwurzacher | 2015-12-19 14:41:39 +0100 |
|---|---|---|
| committer | Jakob Unterwurzacher | 2015-12-19 15:02:29 +0100 |
| commit | 1caa9258685fa5fad8935d3bfcd0eac7d7f84f1e (patch) | |
| tree | abc1e46f269f9ef8f05d812e13fcdf2bae68d298 /Documentation/file-format.md | |
| parent | 88826dc51d7919ef8b190c079955230e653323e2 (diff) | |
Increase GCM IV size from 96 to 128 bits
This pushes back the birthday bound for collisions to make it virtually
irrelevant.
Diffstat (limited to 'Documentation/file-format.md')
| -rw-r--r-- | Documentation/file-format.md | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/file-format.md b/Documentation/file-format.md new file mode 100644 index 0000000..b0d4b55 --- /dev/null +++ b/Documentation/file-format.md @@ -0,0 +1,32 @@ +File Format +=========== + +Header + + 2 bytes header version (big endian uint16, currently 2) + 16 bytes file id + +Data block + + 16 bytes GCM IV (nonce) + 1-4096 bytes encrypted data + 16 bytes GHASH + + +Example: 1-byte file +-------------------- + + Header 18 bytes + Data block 33 bytes + +Total: 51 bytes + + +Example: 5000-byte file +----------------------- + + Header 18 bytes + Data block 4128 bytes + Data block 936 bytes + +Total: 5082 bytes |