Once you get enough entropy into your crypto-random generator you are fine for a very, very long time. They basically use the same algorithms that are used for

Once you get enough entropy into your crypto-random generator you are fine for a very, very long time. They basically use the same algorithms that are used for encryption itself (AES, etc.) and are of equal strength. That means if you can't trust to these generators then you can't trust your encryption (i.e. you are screwed anyway).