Cryptographically Secure, True Random Number Generator

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.