Scary article (in french), Jean-Pierre Seifert discovered a way to predict the way keys are computed by the processor. Depending on the speed of finding the key a malicious program could scan the processor and discover a 512 key in a matter of seconds. The announcement of the way to this will be done at the next RSA meeting.
The only way to fix this is apparently to use a dedicated, not optimize processor for securtity
I found this partial translation of the french article from LeMonde
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