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Without using a chip, you can already use your credit card in automated machines. The "security" is to enter your zip code. You can do this at gas stations everywhere, and to buy a metrocard in NYC. You never have to sign a slip.
My husband's card has "Blink" on it and he can hold it up to the reader in a taxi to pay without having to swipe. I guess that is NFC?
eP
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