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paralleldrive / cuid

Collision-resistant ids optimized for horizontal scaling and performance.
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Question: cuid compare to /dev/urandom #201

Closed prasad-1210 closed 4 years ago

prasad-1210 commented 4 years ago

Is CUID proven to be more collision resistant than /dev/(u)random that is part of *nix operating systems?

ericelliott commented 4 years ago

CUID uses cryptographically secure random number generation when it's available, but falls back on Math.random() when it's not. The former is likely to compare favorably with /dev/urandom. Math.random() is not a CSRNG, but cuid is still very unlikely to collide due to the fact that it combines the random number with the current system time in ms and a pseudo-unique host fingerprint.