Il 31/10/2012 15:15, H. Peter Anvin ha scritto: >> >> Related to this, rdrand's "entropy content" in the worst case will be >> only 1/255th of the data it produces: Intel documents that one 256-bit >> seed will result in up to 1022 64-bit random numbers. Yet, it is good >> enough to drive rngd. Would it make sense for QEMU to implement the >> same kind of stretching of /dev/random data, to avoid depleting the >> host's entropy pool too fast? >> > > Absolutely not; in fact, we have to do data reduction in rngd for > exactly this reason (and a Qemu backend would have to do the same). > There is a new RDSEED instruction in newer CPUs to correct this.
Ok, thanks. At least I asked. :) Paolo
