Comments on: Random Numbers and NTL http://thecosmotron.com/2008/12/04/random-numbers-and-ntl/ the blog of ryan lewis Mon, 23 Jan 2012 20:31:27 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: bal http://thecosmotron.com/2008/12/04/random-numbers-and-ntl/comment-page-1/#comment-3512 bal Thu, 07 Jan 2010 00:40:12 +0000 http://thecosmotron.com/?p=68#comment-3512 that should be include time.h that should be include time.h

]]> By: bal http://thecosmotron.com/2008/12/04/random-numbers-and-ntl/comment-page-1/#comment-3511 bal Thu, 07 Jan 2010 00:36:36 +0000 http://thecosmotron.com/?p=68#comment-3511 #include SetSeed(to_ZZ(clock())); #include

SetSeed(to_ZZ(clock()));

]]> By: Ryan Lewis http://thecosmotron.com/2008/12/04/random-numbers-and-ntl/comment-page-1/#comment-348 Ryan Lewis Tue, 09 Dec 2008 05:24:28 +0000 http://thecosmotron.com/?p=68#comment-348 Cool! I knew there had to be an easier way, thanks for replying! Cool! I knew there had to be an easier way, thanks for replying!

]]> By: Jeff W http://thecosmotron.com/2008/12/04/random-numbers-and-ntl/comment-page-1/#comment-347 Jeff W Tue, 09 Dec 2008 03:03:04 +0000 http://thecosmotron.com/?p=68#comment-347 Ryan, I used random ZZ's pretty extensively in the code for my honors thesis. Looking back at the code I see that all I did was this: srand ( time(NULL) ); SetSeed( to_ZZ(rand()) ); Then to get a random ZZ, I called: ZZ x = RandomBnd(N); which gives you 0 <= x <= N. Perhaps this isn't the "most secure" or "random" way to do it, but it's definitely easier and shorter. Good luck! Jeff Ryan,

I used random ZZ’s pretty extensively in the code for my honors thesis. Looking back at the code I see that all I did was this:

srand ( time(NULL) );
SetSeed( to_ZZ(rand()) );

Then to get a random ZZ, I called:

ZZ x = RandomBnd(N);

which gives you 0 <= x <= N. Perhaps this isn’t the “most secure” or “random” way to do it, but it’s definitely easier and shorter.

Good luck!
Jeff

]]>