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Re^3: Your random numbers are not that random

by Anonymous Monk
on Jul 23, 2012 at 01:04 UTC ( #983095=note: print w/replies, xml ) Need Help??


in reply to Re^2: Your random numbers are not that random
in thread Your random numbers are not that random

/dev/random and /dev/urandom are used to supply entropy (randomness) to the system. They both come from the same pool of randomness in the kernel. One blocks until enough randomness is obtained to provide a number. The other tries to make due with however much randomness the kernel has (and doesn't block).

Haveged (and other programs) are means to supply the kernel with randomness. By default, haveged manages a 1M buffer of randomness. Haveged does not appear to keep open a file for this buffer of randomness, so perhaps it doesn't write the buffer to disk on shutdown.

But in any event, it seems to build the pool of randomness in the kernel faster than most other things I've tried.

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[erix]: in this context, one learns all kinds of interesting psychological excuse-jargon: not just 'alternative facts'; how about 'gapped knowledge' ? :)
[erix]: which still manages to sound more or less positive
[Corion]: Huh. I wasn't aware that you cannot segregate Python 2 and Python 3 modules... Hopefully Perl 6 module use C6AN and thus avoid the problem...
[hippo]: I very much hope so.
[moritz]: there are already some (very few) Perl 6 modules on CPAN, but in a way that the p5 indexer avoids them
[hippo]: It's confusing enough to have the Perl6:: namespace which isn't for Perl6 but for features from that ported into Perl.

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