I thought the same thing. This comment on crypto.stackexchange.com[1] shed a bit of light for me: Yup, entropy sources may even have a particular bias to b

I thought the same thing. This comment on crypto.stackexchange.com[1] shed a bit of light for me: Yup, entropy sources may even have a particular bias to bits valued 0 or 1. Normally you need at least a whitening technique to get something looking like a random number. Feeding that as a seed into a PRNG is certainly helping to get the right quality. Be careful not to confuse a source of entropy with a secure random number generator. [1] http://crypto.stackexchange.com/questions/726/what-is-the-use-of-real-random-number-generators-in-cryptography#comment3459_726 http://crypto.stackexchange.com/questions/726/what-is-the-us...