In Unix-like operating systems, /dev/random and /dev/urandom are special files that provide random numbers from a cryptographically secure pseudorandom number generator (CSPRNG). The CSPRNG is seeded with entropy (a value that provides randomness) from environmental noise, collected from device drivers and other sources.
In Unix-like operating systems, /dev/random and /dev/urandom are special files that provide random numbers from a cryptographically secure pseudorandom number generator (CSPRNG). The CSPRNG is seeded with entropy (a value that provides randomness) from environmental noise, collected from device drivers and other sources.
Source: Wikipedia "/dev/random" · CC BY-SA 4.0
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