From: ts <decoux@...>
Date: 2004-05-22T01:32:05+09:00
Subject: Re: [OT] Re: ISAAC Random Number Generator

>>>>> "P" == Paul Sanchez <paul@NOargelSPAMfraster.org> writes:

P> Thanks for the clarification.  Now you've got me curious - what makes a 
P> generator cryptographically secure, as opposed to being statistically 
P> indistinguishable from true randomness (which is what you want for Monte 
P> Carlo)?

 Well a prng is said cryptographic when
   * it's difficult to predict the output from examining the previous
     output

   * it's difficult to extract internal state from examining the output

  http://encyclopedia.thefreedictionary.com/Cryptographically%20secure%20pseudo-random%20number%20generator 



Guy Decoux