Daeseon Choi

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We have discovered a security vulnerability in the Samsung Pay app. The magnetic secure transmission in Samsung Pay emits too many magnetic signals that are excessively strong. Thus, we built a low-cost receiver to eavesdrop on the emitted magnetic signals. Using this receiver, we successfully eavesdropped the one-time token for a payment made on the(More)
Internet phishing attacks have been evolving along with the growth of online transactions on the Internet. MITM(Man-In-The-Middle) phishing is an attack that manipulates authentication and transaction information when an attacker is located in between a web server and a user. The possibility of this sort of phishing attack has been posed for a long time,(More)
The most popular platforms being developed currently are those used in mobile devices. In particular, mobile Web-based services have attracted the attention of platform developers. However, mobile Web applications offer limited functionality. Therefore, in this paper, we propose a scheme called Gatekeeper, which offers secure interworking for mobile(More)