![]() And in the case of one-time pads, the information-theoretic guarantee of perfect secrecy only holds if the key material comes from a true random source with high entropy, and thus any kind of pseudorandom number generator is insufficient. On the other hand, the generation of a master key requires a higher quality, such as more entropy. The "quality" of the randomness required for these applications varies.įor example, creating a nonce in some protocols needs only uniqueness. salts in certain signature schemes, including ECDSA, RSASSA-PSS. ![]() ![]() Most cryptographic applications require random numbers, for example: It is also loosely known as a cryptographic random number generator ( CRNG) (see Random number generation § "True" vs. Type of functions designed for being unsolvable by root-finding algorithmsĪ cryptographically secure pseudorandom number generator ( CSPRNG) or cryptographic pseudorandom number generator ( CPRNG) is a pseudorandom number generator (PRNG) with properties that make it suitable for use in cryptography.
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