@4Dgifts @solardiz @TheKanter @danluu @byterazor @ortegaalfredo I think we haven't seen them because, quite frankly, they are not needed…
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Replying to @cynicalsecurity
@cynicalsecurity@4Dgifts@solardiz@TheKanter@danluu@byterazor exactly. Hard backdoors are a bad idea, too easy to turn them against you2 replies 0 retweets 0 likes -
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Replying to @4Dgifts
@4Dgifts@ortegaalfredo@cynicalsecurity@TheKanter@danluu@byterazor Would a tiny bit of non-volatile memory be easily seen on a die shot?2 replies 0 retweets 1 like -
Replying to @solardiz
@solardiz@4Dgifts@ortegaalfredo@cynicalsecurity@TheKanter@byterazor Very hard to sneak in, since it's a different manuf. process.1 reply 1 retweet 0 likes -
Replying to @danluu
@solardiz@4Dgifts@ortegaalfredo@cynicalsecurity@TheKanter@byterazor However, it's common to build mini-logic analyzers in for si debug2 replies 1 retweet 0 likes -
Replying to @danluu
@danluu@solardiz@4Dgifts@ortegaalfredo@cynicalsecurity@byterazor intel has a full-blown logic analyzer for the on-chip fabric3 replies 2 retweets 1 like -
Replying to @TheKanter
@TheKanter@danluu@4Dgifts@ortegaalfredo@cynicalsecurity@byterazor Any way we can access such in-CPU logic analyzers from our software?1 reply 1 retweet 0 likes -
Replying to @solardiz
@solardiz@TheKanter@4Dgifts@ortegaalfredo@cynicalsecurity@byterazor In all cases that I know of, you'd have to reverse engineer access1 reply 1 retweet 0 likes
@solardiz @TheKanter @4Dgifts @ortegaalfredo @cynicalsecurity @byterazor Not sure how, since unlike K8 case, you won't have ptrs in binaries
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Replying to @danluu
@solardiz@TheKanter@4Dgifts@ortegaalfredo@cynicalsecurity@byterazor unless you dig through trash HDs from post-si debug lab or somethin1 reply 0 retweets 0 likes -
Replying to @danluu
@danluu@solardiz@4Dgifts@ortegaalfredo@cynicalsecurity@byterazor most post-Si debug tools are for vendors only; unclear if partners1 reply 0 retweets 0 likes - 3 more replies
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