Why not get randomness from sensors?
Posted May 11, 2006 6:08 UTC (Thu) by jwb
In reply to: Why not get randomness from sensors?
Parent article: On the safety of Linux random numbers
It is fantastically expensive to communicate with the most common sensor hardware. Often the system has to bang bits over a two-wire port. It is reasonable to access these devices once every second or so, but I doubt that you'd be able to sample them often enough to generate substantial entropy.
It would be nice if hardware entropy devices were more common. There are plenty of random processes out there in the electrical world, like shot noise.
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