haveged 1.9.13 Entropy source for the Linux random number generator
haveged generates an unpredictable stream of random numbers for use by Linux's
/dev/urandom devices. The kernel's standard mechanisms for filling the entropy pool may not be sufficient for systems with high needs or limited user interaction, such as headless servers.
haveged runs as a privileged daemon, harvesting randomness from the indirect effects of hardware events on hidden processor state using the HAVEGE algorithm. It tunes itself to its environment and provides the same built-in test suite for the output stream as used on certified hardware security devices.
The quality of the randomness produced by this algorithm has not been proven. It is recommended to run it together with another entropy source like rngd, and not as a replacement for it.