Haveged - A Simple Entropy Daemon

Haveged is an easy-to-use, unpredictable random number generator based upon an adaptation of the HAVEGE algorithm.

It was created to remedy low-entropy conditions in the Linux random device that can occur under some workloads, especially on headless servers.

How does the havege algorithm generate random numbers?

The havege algorithm gathers the random timing variations encountered in benchmarking a PRNG calculation. The calculation is constructed to be sensitive to the effects of hardware interrupts and the output continually reseeded by XOR differences of successive iterations of the benchmark.

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