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What matters is entropy. What makes a PRNG cryptographically secure is the inability of attackers to predict the next bytes. Precisely, there are three "security levels" that define the security, in the following model: The attacker is given s bits of consecutive output from the PRNG. The attacker's computing abilities are limited to 2k elementary ...


What should be the size of the seed that I initialize a CSPRNG with? Seed Length and other requirements for approved block cipher algorithms are summarized here: How often should I reseed it? The seed is secure as long as it remains unknown to the attacker. I think I can not explain better than this answer. CSPNRG entropy is calculated using ...


This certification is typically done through FIPS certification. The list of labs certified by NIST to perform FIPS certifications is here

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