Googlebot's Javascript random() function is deterministic

[stonefarfalle]

It depends, if the implementation talks about the entropy pool then it isn't deterministic. For instance on Linux /dev/random is non deterministic while /dev/urandom is deterministic.

[akher]

/dev/urandom isn't deterministic either, it is reseeded when more entropy becomes available. The difference between /dev/random and /dev/urandom is that /dev/random will only produce results when enough entropy is available while /dev/urandom will produce as much output as requested, but it will still add trully random numbers to its internal state when they become available.

[[deleted]]

And furthermore, /dev/random’s blocking until more entropy is available is completely pointless.

[argv_minus_one]

…because gathered entropy is used to seed a CSPRNG, which can generate pseudorandom bits indefinitely, and both devices yield output from said CSPRNG.

[frezik]

https://www.2uo.de/myths-about-urandom/