hello!
There is a nice text on the theory of PRG:s by Goldreich downloadable
for free at his homepage if somebody is interested.
http://theory.lcs.mit.edu/~oded/frag.html
Another general tip on Crypto texts for free is lecture notes by
Bellare:
http://www-cse.ucsd.edu/users/mihir/papers/gb.html
/Douglas
Bernard Dautrevaux wrote:
>
> > -----Original Message-----
> > From: Bill Rebey [mailto:[EMAIL PROTECTED]]
> > Sent: Tuesday, June 20, 2000 7:52 PM
> > To: [EMAIL PROTECTED]
> > Subject: RE: Cipher question...
> >
> >
>
> <skipped>
>
> >
> > Even if all 64 bytes in my seed array are the same, (say for instance
> > 0x03F567A2) isn't
> > 0x03F567A203F567A203F567A203F567A203F567A203F567A2.....(out
> > to 256 bytes) a
> > sufficiently large and sufficiently "random value " with
> > which to seed the
> > RNG? How could someone predict that?
>
> The problem is that I don't have to predict
> 0x03F567A203F567A203F567A203F567A203F567A203F567A2..., but just 67A2 if I
> only knows the DAY in which you seed you PRNG... If I can guess the hour and
> minute (by looking at the message header) I only have to guess A2!... not a
> terribly difficult issue ;^)
>
> The problem is usually confusing seeding a PRNG to obtain unrelated
> sequences (as needed when using montecarlo techniques fro statistical
> analysis) and when one need to obtain UNPREDICTABLE sequences. Here we're
> talking of the second case; your approach may be valid for the first case
> but not at all for cryptographic activities.
>
> HTH
>
> Bernard
>
> --------------------------------------------
> Bernard Dautrevaux
> Microprocess Ingéniérie
> 97 bis, rue de Colombes
> 92400 COURBEVOIE
> FRANCE
> Tel: +33 (0) 1 47 68 80 80
> Fax: +33 (0) 1 47 88 97 85
> e-mail: [EMAIL PROTECTED]
> [EMAIL PROTECTED]
> --------------------------------------------
> ______________________________________________________________________
> OpenSSL Project http://www.openssl.org
> User Support Mailing List [EMAIL PROTECTED]
> Automated List Manager [EMAIL PROTECTED]
--
------------------------------------------------------
Douglas Wikström <[EMAIL PROTECTED]>
------------------------------------------------------
Yes, God created Man before Woman,
but one always makes a draft before the masterpiece.
------------------------------------------------------
______________________________________________________________________
OpenSSL Project http://www.openssl.org
User Support Mailing List [EMAIL PROTECTED]
Automated List Manager [EMAIL PROTECTED]
