How secure are your RFID car key and other devices-to be afraid, or not?
DesignCon 2012 will see two live demonstrations of key recovery from mobile devices through RF electromagnetic (EM) signal analysis. These are part of the presentation, "Secret Cryptographic Key Extraction from Mobile Devices using RF EM Emissions," (Session 12-WP6), by Gary Kenworthy of Cryptography Research on Wednesday, February 1, from 2:50 to 3:30 p.m. in Ballroom F of the Santa Clara Convention Center.
One analysis uses a magnetic field probe to recover the private key of an RSA public key encryption algorithm. A second demonstration recovers the key from an ECC algorithm from a distance of approximately 3m. Both analyses use inexpensive readily available RF receiving equipment for signal collection. Baseband EM approaches are similar to power measurement attacks such as SPA and DPA. EM analyses do not require the same level of physical access to a device that other side channels may require. Compliance with FCC emission thresholds will likely not provide a sufficient level of protection. The presentation discuss hardware, software, and protocol level countermeasures that substantially mitigate information leakage, as well as testing methods beyond FCC for quickly assessing the degree of protection.
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