Comment on Hardware backdoors in some x86 CPUsparentComments−inigyou1moWas this documentation public at the time? The pdf still does not document the instructions themselves.−userbinator1moIt was public at least 4 years before he first announced his discovery:https://web.archive.org/web/20140130160743/http://datasheets...−23455646gg3g1moyes, AIS was knownsandsifter was lots of noisy PR, but no new encoding findings−jcranmer1moAFAIK, sandsifter did find a halt-and-catch-fire instruction on one of the CPUs, but I haven't seen anyone announce which CPU model it was.
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Was this documentation public at the time? The pdf still does not document the instructions themselves.
It was public at least 4 years before he first announced his discovery:
https://web.archive.org/web/20140130160743/http://datasheets...
yes, AIS was known
sandsifter was lots of noisy PR, but no new encoding findings
AFAIK, sandsifter did find a halt-and-catch-fire instruction on one of the CPUs, but I haven't seen anyone announce which CPU model it was.