Is hyperthreading dangerous?
Posted May 19, 2005 12:56 UTC (Thu) by ballombe
Parent article: Is hyperthreading dangerous?
Interestingly, when the mergemem pacth (http://mergemem.ist.org/) was proposed in 1998, it was accompanied by a note stating a similar security concern. (Hostile programs could generate pages and see whether memory usage go up or not, and deduce they were merged).
Avoidance of data-dependent memory access patterns is already in use in smartcard devices (it is much easier to exploit once you have stolen the smartcard, though).
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