Statistical simulations require good randomness (or your simulation might give a wrong result) and high speed but not cryptographic security. See, for example,

Statistical simulations require good randomness (or your simulation might give a wrong result) and high speed but not cryptographic security. See, for example, xorshift* (http://xorshift.di.unimi.it http://xorshift.di.unimi.it), which is efficient and high-quality but not cryptographically secure.