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Do you happen to know if CrashPlan's encryption is any better? AFAIK AES in CBC-mode is a no-no because it betrays which blocks of data are identical, and that
by cryptarch 9y ago
Do you happen to know if CrashPlan's encryption is any better?
AFAIK AES in CBC-mode is a no-no because it betrays which blocks of data are identical, and that's what BlackBlaze uses.
- timcederman 9y agoWithout inspecting the system, hard to say for sure, but on paper it's much better. https://support.code42.com/CrashPlan/4/Configuring/Security_Encryption_And_Password_Options https://support.code42.com/CrashPlan/4/Configuring/Security_... I really liked the fact that I could set my own key too.
- rocqua 9y agoThat is not the case. That would be ECB mode. CBC stands for cipher-block-chaining. Where you xor the plaintext with the ciphertext of the last block before encryption specifically to prevent identical blocks from yielding identical ciphertext. There are some issues with CBC regarding the fact that it can't really be parralelized. It also lacks authentication as opposed to the newer GCM mode. In general though, AES-256 CBC is essentially THE standard best practice proven form of encryption.
- cryptarch 9y agoOh, thanks for the info, I mixed those up.