I’ve been recommending disabling hyperthreading for 5 years. Do it now.https://github.com/jedisct1/system-tuning-for-crypto …
Replying to @jedisct1
This might be another case of "If you have secret-dependent control flow then you have opened up a timing side channel." They chose OpenSSL's NIST P-384 which has a lot of that. Not clear yet whether there is a problem even for branch free (or even less branchy) code.
4:25 PM - 1 Nov 2018
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