There are a many ways how to recover a signal from the noise. This means that the sidechannel from the string comparison looks irrelevant, but given enough samp

There are a many ways how to recover a signal from the noise. This means that the sidechannel from the string comparison looks irrelevant, but given enough samples there is an information in that. And well, somehow getting rid of the noise is the idea behind essentially any side-channel attack. For context: the GPS signal that your phone fixes to is something like -120dB under the noise floor, there is a way to recover that.