26 Sep
2017
26 Sep
'17
3:14 p.m.
AFAICT, it is UNBREAKABLE if the keysize is at least half the size of your plaintext.
My understanding is that the keysize ought to be as long as the message to be encrypted.
Well if they don't know the key length, then using somewhere between 1/3 and 2/3 should make it unbreakable.
And yes, it is unbreakable... UNLESS you try to reuse the keys!!!
Hmm, but THEY don't know if you re-used them. So it would take how many ciphertexts messages to figure that out? Marxos