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Re: [Bug-gnubg] Simpler PRNG

From: Philippe Michel
Subject: Re: [Bug-gnubg] Simpler PRNG
Date: Sat, 17 Jan 2015 00:57:28 +0100 (CET)
User-agent: Alpine 2.11 (BSF 23 2013-08-11)

On Thu, 15 Jan 2015, Michael Petch wrote:

I'm in agreement with Ian Shaw that a decrease in the options of random
number generators is probably more ideal. If others wish to weigh in on
this I am more than happy to listen.

Available RNGs are :


Mediocre generators from system libraries. They could probably be dropped. Code simplification would be minimal.


It could probably be dropped. Some code simplification but the MD5 hash routines are still needed for something else.


Apparently the first strong RNG used by gnubg before Mersenne. It is used in some other places (generating graphical patterns, choosing where the dice land on the board, etc...) where one of the generators from libc would probably be good enough. Interesting to drop since it is included in source form, not from a library.


The most profitable to drop. It causes a dependency on the gmp library. On the other hand, it brings a feature (cryptographically secure) that none of the other generators has. How important is it to have this ?


Keep them.

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