perl-Crypt-Random -- Cryptographically Secure, True Random Number Generator
http://search.cpan.org/dist/Crypt-Random/
Crypt::Random is an interface module to the /dev/random device found on most modern unix systems. It also interfaces with egd, a user space entropy gathering daemon, available for systems where /dev/random (or similar) devices are not available. When Math::Pari is installed, Crypt::Random can generate random integers of arbritary size of a given bitsize or in a specified interval.