[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Improve `seed->random-state' in stable-2.0?

From: Andy Wingo
Subject: Re: Improve `seed->random-state' in stable-2.0?
Date: Fri, 20 Jan 2012 15:54:27 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

On Fri 20 Jan 2012 04:28, Mark H Weaver <address@hidden> writes:

> `seed->random-state' is poorly implemented when passed a numeric
> argument.  It converts the number to a decimal string, and then
> `scm_i_init_rstate' takes over and basically adds every 8th byte
> together to form the 64-bit internal state.

Is that what it does?

I agree that it's a pretty bad initializer to a pretty bad PRNG, but
from what I can tell, it does use all of the bytes in the input.  They
aren't very dense bytes, entropy-wise, but there are more of them, so I
think the amount of entropy added to the seed is the same.

Dunno.  Am I reading that code wrong?



reply via email to

[Prev in Thread] Current Thread [Next in Thread]