Bug #67795 [Opn]: PHP lacks a modern RNG

Edit report at https://bugs.php.net/bug.php?id=67795&edit=1 ID: 67795 User updated by: ryacko at gmail dot com Reported by: ryacko at gmail dot com Summary: PHP lacks a modern RNG Status: Open Type: Bug Package: Math related PHP Version: Irrelevant Block user comment: N Private report: N New Comment: https://www.cisuc.uc.pt/publication/show/2676 Forgot to mention Tyche. Previous Comments: ------------------------------------------------------------------------ [2014-08-06 09:47:55] ryacko at gmail dot com Modern RNG are very fast and have better distribution. The Mersenne twister has weak seeds, as well as a small seed state. Several good pseudo random number generators include: - http://www.iro.umontreal.ca/~panneton/WELLRNG.html (superior equidistribution) - ChaCha4 (on some chips it has less than a cycle per byte) - 128-bit AES counter (on chips with AES instruction, it could very well reach 3 gigabytes per second) - http://www.math.sci.hiroshima-u.ac.jp/~%20m-mat/MT/SFMT/index.html Mersenne Twister SIMD, 4 times faster I suggest ChaCha4 or 128-bit AES counter since with either of those one could include stream position in the function. I suggest the following functions: b_srand( string $seed [, $get_additional_entropy] ) it automatically seeds using an md5 hash of the time. Also includes an option to get additional entropy in the same fashion that session.entropy_length gets entropy. b_rand( int $min , int $max, [, int $stream_position] ) An obvious use would be a procedurally generated browser game. ------------------------------------------------------------------------ [2014-08-06 08:06:30] ryacko at gmail dot com Description: ------------ Modern RNG are very fast and have better distribution. The Mersenne twister has weak seeds, as well as a small seed state. Several good pseudo random number generators include: - http://www.iro.umontreal.ca/~panneton/WELLRNG.html (superior equidistribution) - ChaCha4 (on some chips it has less than a cycle per byte) - 128-bit AES counter (on chips with AES instruction, it could very well reach 3 gigabytes per second) - http://www.math.sci.hiroshima-u.ac.jp/~%20m-mat/MT/SFMT/index.html Mersenne Twister SIMD, 4 times faster I suggest ChaCha4 or 128-bit AES counter since with either of those one could include stream position in the function. I suggest the following functions: b_srand( [, $get_additional_entropy] ) it automatically seeds using an md5 hash of the time. Also includes an option to get additional entropy in the same fashion that session.entropy_length gets entropy. b_rand( int $min , int $max, [, int $stream_position] ) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=67795&edit=1