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After the ETH researchers first found a security gap in certain credit cards last year, they have now found a way to outsmart the PIN codes for other payment cards.

Making contactless payment with a credit or debit card is quick and easy and has proven particularly useful during the current pandemic. For additional security, the user has to enter a PIN code above a certain amount (usually CHF 80 in Switzerland) – at least that’s the theory. As three researchers from the information security group at ETH Zurich were able to show, these security measures can be bypassed with certain cards. The first time the researchers were able to document how credit cards could be used without a PIN code was in the summer of 2020 with Visa cards. The…



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