Simulations of stochastic processes also require good RN generators, especially for simulations of large systems with (I hate to use this word) emergent behavioral properties. A bad RN generator will introduce emergent behavior that will be "flavored" by a bad random sequences.
-- Doug Roberts, RTI International [EMAIL PROTECTED] [EMAIL PROTECTED] 505-455-7333 - Office 505-670-8195 - Cell On 7/20/07, Russell Standish <[EMAIL PROTECTED]> wrote:
Cryptographic applications require true randomness. If your cipher used on a pseudo-random number generator, then a cracker discovering your algorithm and key has broken your code. I also have a hunch that genuine randomness is needed for open-ended evolutionary systems. Here, the evol algorithm is in the position of the code cracker, and once the code is cracked, the evol algorithm stops. I had a workshop paper on this in 2004, which has some problems with it. The concept is controversial, to say the least. Cheers On Sat, Jul 21, 2007 at 10:24:42AM -0600, Peter Lissaman wrote: > Why is it important (except intellectually) to have "true" randomness??? I very well remember the early, good old, bad old, days of Aerospace, in the 50's, when we were really doing practical earthshattering things -- like going to the moon -- sans computers!! The RAND corporation, for whom I consulted, published a typed book (size of a Manhattan telephone directory) of "random" numbers for engineering application. Much entertainment was occasioned when, about three months later, they distributed a list of "typos" to their original list of random numbers. Today I use homemade random numbers alla time for real problems, specifically the actual response of real flight vehicles in real atmospheric turbulence. Flight tests support analysis, in the sense that what we predict is not obviously incorrect. We have never found it necessary to utilize any more "perfectly random" "random" sequences! > > > Peter Lissaman, Da Vinci Ventures > > Expertise is not knowing everything, but knowing what to look for. > > 1454 Miracerros Loop South, Santa Fe, New Mexico 87505 > TEL: (505) 983-7728 FAX: (505) 983-1694 > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > lectures, archives, unsubscribe, maps at http://www.friam.org -- ---------------------------------------------------------------------------- A/Prof Russell Standish Phone 0425 253119 (mobile) Mathematics UNSW SYDNEY 2052 [EMAIL PROTECTED] Australia http://www.hpcoders.com.au ---------------------------------------------------------------------------- ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
