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Any encryption scheme worth using will not be identifiable by a randomness test. Block ciphers like AES are designed specifically to model pseudorandom permutat
by ReidZB 13y ago
Any encryption scheme worth using will not be identifiable by a randomness test. Block ciphers like AES are designed specifically to model pseudorandom permutations (or, rather, this was one of their design goals); being able to distinguish them from truly-random data would be a rather frightening result.
For more information, see "Is it possible to distinguish a securely-encrypted ciphertext from random noise?" at http://crypto.stackexchange.com/q/1646/2454 http://crypto.stackexchange.com/q/1646/2454
- pnathan 13y agoPretty sure what the poster meant was that if you have a file with random noise on the hard drive, that itself signals that something is encrypted.
- phlo 13y agoWell, only two typical use cases will lead to owning a hard drive filled with (pseudo-)random noise: secure deletion or encrypted data. If you used either, you've got something to hide and it's a well-known fact only terrorists and communists do.
- gknoy 13y agoOr, radio telescope analysis. I wonder how hard it is to get a terabyte of radio telescope noise. If I had that, how hard would it be to use it to xor with a truecrypt partition.