Reply to post: Re: Why CPU rng

Linux 4.19 lets you declare your trust in AMD, IBM and Intel

Charles 9 Silver badge

Re: Why CPU rng

"(As an aside the current issue with CPUs is that the care of design needed to defeat covert channels done for the RDRAND instruction needs to be repeated throughout the CPU design for other instructions.)"

Well, one problem with that approach is that these CPUs are more often being put into portable applications where power isn't a given. In which case efficiency trumps security unless you can achieve both (which last I checked, you can't; efficiency inevitably leaves tells).

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