ElevenPaths Blog: Cómo se usa la aleatoriedad en la seguridad
Myths about /dev/urandom

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/dev/urandom is a pseudo random number generator, a PRNG, while /dev/random is a “true” random number generator.

    Fact: Both /dev/urandom and /dev/random are using the exact same CSPRNG (a cryptographically secure pseudorandom number generator). They only differ in very few ways that have nothing to do with “true” randomness.
“

Myths about /dev/urandom

/dev/urandom is a pseudo random number generator, a PRNG, while /dev/random is a “true” random number generator.

Fact: Both /dev/urandom and /dev/random are using the exact same CSPRNG (a cryptographically secure pseudorandom number generator). They only differ in very few ways that have nothing to do with “true” randomness.

Various ways to get randomness wrong « Otaku, Cedric’s blog
(vía Dilbert comic strip for 10/25/2001 from the official Dilbert comic strips archive.)