Keccak-based userspace pseudorandom number generator. With the default parameters, krandom is about twice as fast as Linux's /dev/urandom. And it's tunable! Can krandom be used as an entropy-generator? Basically, no. The only less effective way to generate entropy is to print /dev/urandom. Good ways to generate entropy include: Typing randomly in the terminal Moving the rat pointer around erratically Run ping Listen to music Watch videos Run ponysay (surprisingly effective)