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Not specifically. ECDSA is a signing algorithm. Unless there's some really fancy asymmetric authentication protocol between components within the phone, which p
by nly 11y ago
Not specifically. ECDSA is a signing algorithm. Unless there's some really fancy asymmetric authentication protocol between components within the phone, which perform curve operations, it's most unlikely. Of course, there's no saying a hardware side-channel isn't a possible attack vector.
- TickleSteve 11y agoThere is a dedicated authentication coprocessor, to which the communications will be authenticated, so yes.
- ctz 11y agoThe thing you're talking about ("secure enclave") is not present in the phone the FBI are trying to attack. Also, the Secure Enclave co-processor is on-die, so there will be no need to authenticate or encrypt communications with it.