Writing Secure Code

Do use the system cryptographic pseudo-random number generator (CRNGs) when at all possible.

Do make sure that any other cryptographic generators are seeded with at least 64 bits of entropy, preferably 128 bits.

Do not use a noncryptographic pseudo-random number generator (noncrytographic PRNG).

Consider using hardware random number generators (RNGs) in high-assurance situations.