> From: Reshetova, Elena > > Sent: 24 April 2019 12:43 > > > > Sorry for the delay - Easter holidays + I was trying to arrange my brain > > around > proposed options. > > Here what I think our options are with regards to the source of randomness: > > > > 1) rdtsc or variations based on it (David proposed some CRC-based variants > > for > example) > > Do I remember something about rdtsc being made less accurate in order to > make it (slightly) more difficult to use it to measure timing attacks?
Do you have any pointers on this? I did an online search, but could not find anything concrete. The Intel manual doesn't talk about precision at all, only about protected mode. > > If true, and it applies to the kernel (eg in a VM) then this is probably > all pointless! You mean additional constructions on top of TSC is pointless? Best Regards, Elena.
