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Re: 64-bit srandom()?

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Re: 64-bit srandom()?

Subject: Re: 64-bit srandom()?
From: Michael Smith <email@hidden>
Date: Thu, 15 Nov 2007 12:28:05 -0800


On Nov 14, 2007, at 12:04 PM, email@hidden wrote:

int32_t seed=(int32_t)(time(NULL) & 0xff);
srandom(seed);
That seems more like the least-significant 8 bits.
Note that strictly speaking, seeding srandom with time may not be exactly secure, but then, srandom's not a cryptographically secure RNG anyway.

More to the point, the *only* time you want to use srandom() is when you want a reproducible set of pseudo-random numbers.

If your original objective was to obtain random numbers, you should be reading bytes from /dev/random or similar.

 = Mike

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