Re: x86 MSRs - example program

Marc Lehmann (mlehmann@hildesheim.sgh-net.de)
Mon, 3 Mar 1997 21:15:51 +0100 (MET)

>>
>> ON the other hand... security hole????? how????????
>>
>Cryptography. If you know exactly how long a given algorithm takes for
>different inputs, you can sometimes infer clues about the secret key.

gettimeofyday is always available, and in that scenario is just
as good as rdtsc.

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The choice of a GNU generation