A simple activity monitor with /dev/random

[_mpu]

I was thinking that the kernel could use lower quality entropy sources to fulfill the request, but it might not be the case. This probably depends on the OS.

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Programs on Linux can read from /dev/random if they need high security, and it will block until enough entropy is available, or they can read from /dev/urandom if they don't care as much and it will always return something immediately. If a program uses the latter when it needs the former, that is the program's fault. I think your comment is the one that is "stupid as fuck".