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From Martin van den Bemt <mll...@mvdb.net>
Subject Re: svn commit: r418646 - /jakarta/commons/proper/math/trunk/src/test/org/apache/commons/math/random/RandomDataTest.java
Date Tue, 04 Jul 2006 10:34:41 GMT
Thanx for a more rigid explenation :)

Mvgr,
Martin

Luc Maisonobe wrote:
> 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.
> 
> Luc
> 
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