this post was submitted on 12 Sep 2025

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What is something that should have died out a long time ago? (lemmy.world)

submitted 1 year ago by chunes@lemmy.world to c/asklemmy@lemmy.world

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[–] CanadaPlus@lemmy.sdf.org 2 points 1 year ago (2 children)

Does smartcard and wireless actually have an encryption layer of some kind?

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[–] tal@lemmy.today 2 points 1 year ago (1 child)

I'd assume so, but more importantly, for both, there's a cryptographic signature being performed by the card. The credentials never leave the card

there's a private key on the card, and what goes out is a signature on the transaction, which is useless for doing other transactions.

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[–] CanadaPlus@lemmy.sdf.org 2 points 1 year ago

That's not true for all cards, at the very least. Skimming wirelessly by RFID is or was a thing. The whole backbone of the credit card system is designed to expect the number.

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