Cryptographically secure pseudorandom number generator

A cryptographically secure pseudo-random number generator (CSPRNG) or cryptographic pseudo-random number generator (CPRNG) is a pseudo-random number generator (PRNG) with properties that make it suitable for use in cryptography.

Many aspects of cryptography require random numbers, for example:

• key generation
• nonces
• one-time pads
• salts in certain signature schemes, including ECDSA, RSASSA-PSS

See also

• Cryptography
• OpenSSL:Random

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• Wikipedia (en) Cryptographically secure pseudorandom number generator