27 Sep
2017
27 Sep
'17
6 p.m.
On Wednesday, September 27, 2017, 7:24:22 AM PDT, \0xDynamite <dreamingforward@gmail.com> wrote:
Well if they don't know the key length, then using somewhere between 1/3 and 2/3 should make it unbreakable.
No, using the full length is necessary. Using a key length less than the full length of the message is very dangerous.
Hmm, as far as I'm aware, you can't do cryptanalysis on 2 characters. Marxos A factoid which is irrelevant in this context. If you only wanted to encrypt two characters, once, you could use ROT-13 and nobody would be the wiser. Jim Bell