[Cryptography] Summary: compression before encryption

Barney Wolff barney at databus.com
Wed Jan 21 18:12:11 EST 2015

On Sun, Jan 18, 2015 at 01:55:05PM -0800, Ray Dillinger wrote:
> It is also ridiculous to think that with any modern cipher a
> one-bit difference in a megabyte file will yield a completely
> different ciphertext with no way to tell which bit with any
> probability greater than the file length in bits.

If you'll pardon a naive question, what happened to IVs?  How do you
arrange to get two ciphertexts with the same IV?  I thought the point
of IVs was so the attacker can't recognize identical plaintexts.

More information about the cryptography mailing list