In contrast, Visa suffers from several critical issues,” the research paper reads. We found no major issues with the Mastercard protocol version running in modern cards. “Our analysis revealed surprising differences between the security of the contactless payment protocols of Mastercard and Visa, showing that Mastercard is more secure than Visa. The wrong cryptogram would be identified much later, when the acquirer submits the transaction data. As it is now common for consumers to pay with their smartphones, the cashier cannot distinguish the attacker’s actions from those of any legitimate cardholder,” the researchers explain.įurthermore, the academics discovered that, in offline contactless transactions in which a Visa or an old Mastercard card is used, because the card doesn’t authenticate to the terminal the Application Cryptogram (AC), the terminal can be tricked into accepting an unauthentic offline transaction. “We have successfully tested our PIN bypass attack on real-world terminals for a number of transactions with Visa-branded cards such as Visa Credit, Visa Electron, and VPay cards. Thus, an attacker could use stolen Visa cards for contactless transactions without knowing the card’s PIN. the mobile phone) and is no longer required. The app mounts a man-in-the-middle attack, telling the terminal that PIN verification was performed on the consumer’s device (i.e. The model revealed that the cardholder verification method is not authenticated, nor cryptographically protected against modification, thus allowing for PIN verification bypass using a crafted Android application. The proposed model takes into consideration all three elements present in an EMV session, the bank, the terminal, and the card. In the second attack, the terminal would be tricked into accepting an unauthentic offline transaction that would later be declined, but only “after the criminal has walked away with the goods.” The scholars built a proof-of-concept Android app that proves the attack’s effectiveness in real-world scenarios. The first attack, the researchers say, allows an adversary to make purchases even without knowing the card’s PIN, using a smartphone to make the payment. Using a symbolic model built in Tamarin, the researchers identified flaws leading to two attacks that target the cardholder or the merchant. In a newly published paper, David Basin, Ralf Sasse, and Jorge Toro-Pozo from the department of computer science at ETH Zurich, explain that vulnerabilities identified in the standard EMV implementation could be exploited to render the PIN verification useless on Visa contactless transactions.ĭeveloped in the mid-90s and named after its founders (Europay, Mastercard, and Visa), EMV is the international standard for smartcard payments, being used in over 80% of card-present transactions worldwide.ĭeemed secure, the standard is still exposed to vulnerabilities, mainly derived from logical flaws, the ETH Zurich researchers say. It does not store any personal data.Researchers with ETH Zurich have identified vulnerabilities in the implementation of the payment card EMV standard that allow for the mounting of attacks targeting both the cardholder and the merchant. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly.
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