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by PeterisP 4595 days ago
As far as I know, EMV has no way for the user (or bank's employees, for that matter) to get that private key out of the chip card; if it was possible then the whole concept would be pretty much useless and allow easy cloning of those cards just like the old magstripes.

The system doesn't allow to "trust other hardware", the card itself has to sign every transaction.