2 ms·
And deduplication would work since the 2nd person would derive the same key for the data and thus can decrypt it?
by cryptox 14y ago
And deduplication would work since the 2nd person would derive the same key for the data and thus can decrypt it?
- dlss 14y agoYes exactly. key = f(data); upload(encrypt(data, key)); store_key(filename, key); Which is to say that every file has a globally 1-to-1 mapping to its encrypted version. I'm not sure how they are storing the (User, [(Filename,Key)]) data, but this is ideally encrypted on a per user basis, making any sort of per-user lookup attacks moot.