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Title:
Practical Relay Attack on Contactless Transactions by Using NFC Mobile Phones
Authors: Lishoy Francis, Gerhard Hancke, Keith Mayes, Konstantinos Markantonakis
Abstract:Contactless technology is widely used in security sensitive applications, including identification, payment and access-control systems. Near Field Communication (NFC) is a short-range contactless technology allowing mobile devices to act primarily as either a reader or a token. Relay attacks exploit the assumption that a contactless token within communication range is in close proximity, by placing a proxy-token in range of a contactless reader and relaying communication over a greater distance to a proxy-reader communicating with the authentic token. It has been theorised that NFC-enabled mobile phones could be used as a generic relay attack platform without any additional hardware, but this has not been successfully demonstrated in practice. We present a practical implementation of an NFC-enabled relay attack, requiring only suitable mobile software applications. This implementation reduces the complexity of relay attacks and therefore has potential security implications for current contactless systems. We also discuss countermeasures to mitigate the attack.
ePrint: https://eprint.iacr.org/2011/618
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