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Researchers hack crypto on RFID smart cards used for keyless entry and transit pass |
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Researchers hack crypto on RFID smart cards used for keyless entry and transit pass Par SecurityLe [2011-10-11] à 21:19:44
Présentation : Researchers at a German university have published a paper detailing a security exploit of the Mifare DESfire MF3ICD40, a widely used RFID smart card. The exploit, which uses an approach previously used to break other wireless crypto systems, demonstrates that even the relatively strong encryption algorithms used in touchless smart cards can be broken with a small investment of time and equipment exposing the shared crypto key and the data stored on them. The exploit was revealed by researchers David Oswald and Christof Paar at the recent Workshop on Cryptographic Hardware and Embedded Systems CHES in Nara, Japan. The attack uses a templated side-channel attack on the card's crypto, an approach first described in a paper by Suresh Chari, Josyula Rao, and Pankaj Rohatgi of IBM's Watson Research Center in 2002. It requires the attacker to have the card itself, an RFID reader, and a radio probe. Using differential power analysis, data is collected from radio frequency energy that leaks out of the card its side channels . Through this process, Oswald and Paar were able to retrieve the entire 112-bit secret key from the MF3ICD40, which uses Triple DES encryption. Read the rest of this article... Read the comments on this post
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