Re: New Random Number Generator for encryption
 From: Lev Dymchenko <levdymchenko@xxxxxxxxx>
 Date: Wed, 11 Aug 2010 19:26:05 0700 (PDT)
On Aug 12, 2:12 am, "Joseph Ashwood" <ashw...@xxxxxxx> wrote:
"MokKong Shen" <mokkong.s...@xxxxxxxxxxx> wrote in message
news:i3tkjq$ofn$03$1@xxxxxxxxxxxxxxxxxxxx
Joseph Ashwood wrote:
........ It is extremely weak against differential
attacks.
A question quite OT: Could you give a pointer to a good
(easy to understand) paper on differential attacks on PRNGs?
I don't know of any convenient reference. I actually modeled it as a 1bit
block cipher in CTR mode. I used the internal counter (I.e. the label for
the particles and a loop count) as the plaintext, the pRNG output is the
ciphertext, from there it is a fairly standard block cipher differential
attack. It works easily in this case becase there is a known counter
involved, from past the counter is only a single round.
Joe
I researched this attack just now and got interesting results. In
short, this attack is not successful, even if counter is known. You
only need not to select odd cube dimension. I will explain it on
update to rng article.
.
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