diff options
| -rw-r--r-- | TODO | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -98,3 +98,13 @@ Encryption tunables changes: disaster. HKDF may prove more robust in the face of partial SHA-2 breaks. Deferred for now until tthere's some other reason to change keysafe's tunables. +* Thomas S points out that All-Or-Nothing Transform could be used to + prevent recovery of a partial key, when not all chunks are available to + an attacker. https://en.wikipedia.org/wiki/All-or-nothing_transform + For this to add security, there would need to be enough storage locations + that they can be partitioned into at least three sets, with the chunks split + amoung the three. One chunk probably contains the actual private + key material, a second signatures and other cruft, and the last chunk + would contain the AONT key. This would require all three sets of servers + to combine their material to crack the key. It would then make sense to + chunk even small keys. |