On Fri, 17 Apr 2015 14:25:36 -0700
David Christensen <dpchr...@holgerdanske.com> wrote:
> On 04/17/2015 12:41 PM, Reco wrote:
...
> > [Perl's Math::Random::ISAAC::XS] doesn't seem to use kernel-based entropy
> > at all. Thank
> > you for pointing me out at it, now I know it so I avoid it.
>
> ISAAC is very useful when I want a repeatable stream of random numbers,
> such as for testing.
>
>
> ISAAC can generate cryptographically secure random number streams by
> feeding it a "good" random seed:
>
> 2015-04-17 14:22:23 dpchrist@t2250 ~
> $ time dd if=/dev/random bs=16 count=1 2>/dev/null | perl
> -MMath::Random::ISAAC::XS -e
> '$r=Math::Random::ISAAC::XS->new(@ARGV);while(print $r->irand){}' | dd
> iflag=fullblock of=/dev/null bs=1M count=100 2>/dev/null
>
> real 0m18.350s
> user 0m18.305s
> sys 0m0.256s
Yes, this is what Math::Random::Secure does - it seeds
Math::Random::ISAAC from /dev/urandom:
http://search.cpan.org/~mkanat/Math-Random-Secure-0.06/lib/Math/Random/Secure.pm#IMPLEMENTATION_DETAILS
Celejar
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