> > > * to pad data to a power of 2, you repeat the data > > No. This lends an attack as well, since the attacker can try and assume > > that several of the last blocks of the file are the same. > > Does that matter given that the mode we are using is rolling? Yes, since its only rolling within a block. After two blocks you start getting the same encryption (your XORing all zeros, so you're essentially just encrypting as a stream cipher). I'm not saying this does give a cryptanalyst any info, but it might.
> I can see why just using nulls would be a little concerning since that > would produce a next to unlimited set of known plain and ciphertexts (if I > remember the mode right, something with all null would make each block > just the last one encrypted) - but now I think you are getting overly > paranoid... You're just now noticing? _______________________________________________ Devl mailing list Devl at freenetproject.org http://lists.freenetproject.org/mailman/listinfo/devl
