Details of encryption

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WrecksEffects
Posts: 1
Joined: Thu Sep 15, 2011 1:55 pm

Details of encryption

Post by WrecksEffects » Thu Sep 15, 2011 2:15 pm

Which encryption algorithm(s) is used by fsarchiver? AES? Twofish? Blowfish? 3DES? How many bits for the encryption key?

Are techniques such as salting and PBKDF2 implemented, in order to slow down brute-force and rainbow table attacks on the password?

What about encryption modes such as CBC, ESSIV, XTS, XEX etc.?

I would prefer to store the FSA backups on an unencrypted external hard drive, in order to make it simpler to restore and less risky to copy to other devices and online cloud storage. But I can do that only if I have confidence in FSA's own encryption implementation.

geoganoe
Posts: 1
Joined: Sun Oct 09, 2011 4:18 am

Re: Details of encryption

Post by geoganoe » Sun Oct 09, 2011 4:43 am

The following is from the main page:

Encryption of the archive using a password. Based on blowfish from libcrypto from openssl.

While this doesn't tell you directly what you asked, the code is likely a straightforward implementation of the library calls, and you can probably get the information you need from the openssl web site.

George

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