Martin van den Bemt wrote :
I read somewhere that linux will speed up doing encryption when eg the keyboard is used (those tokens are used in the linux SecureRandom generator.
It is true when the generator is based on bytes read from the /dev/random device, false when /dev/urandom device is used. The former can block read access when the entropy pool gathering environmental noise is empty. This pool is replenished when events caused by keyboard use, mouse motion and interrupts from disk or other devices. This is the price to pay for cryptographically secure randomness except if you motherborad has some hardware-based random generator chip supported by the kernel (I think there are some) ... However this is far beyond the scope of this list.
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