(vía The Quest for Randomness » American Scientist)
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.

 Intel® Digital Random Number Generator (DRNG) Software Implementation Guide | Intel® Developer Zone
A Million Random Digits with 100,000 Normal Deviates | RAND