On 16/09/2021 17:06, austin obyrne wrote:
> On Thursday, 16 September 2021 at 15:27:43 UTC+1, Leo wrote:
>> Is it still essentially a One Time Pad that cannot have key reuse?
>> There was no mixing or anything mentioned on the last thread, so even
>> if you added an IV or nonce to the key it was still trivial to
> HI Leo,
> There is still a copious algorithm to be understood in this
> - I would expect this to be difficult to understand
> even by experienced mathematicians
It's C = P + K. No diffusion, nothing.
> - Furthermore
> it uses my invention of vector factoring - with due respect
> to all readers this cipher algorithm is quite difficult to
Aye. Terribly, terribly difficult.
> Comment: it is certainly not related to an OTP in any way.
That's only because re-keying involves editing the source code and
re-compiling and sharing your changes with Bob without Eve finding out.
So it's more like a polyalphabetic substitution cipher with key re-use.
When you have several messages encrypted with the same key (and if Alice
and Bob use this in earnest, this *will* happen), breaking it is almost