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F. Stajano, F.-L. Wong and B. Christianson, “Multichannel Protocols to Prevent Relay Attack,” University of Cambridge Computer Laboratory, Cambridge, United Kingdom, DSO National Laboratories, Singapore, University of Hertfordshire, School of Computer Science, Hatfield, United Kingdom.

has been cited by the following article:

• TITLE: Vehicle Relay Attack Avoidance Methods Using RF Signal Strength

  AUTHORS: Gyu-Ho Kim, Kwan-Hyung Lee, Shim-Soo Kim, Ju-Min Kim

  KEYWORDS: Authentication; Relay Attack; Signal Strength; Smart Key System

  JOURNAL NAME: Communications and Network, Vol.5 No.3C, October 7, 2013

  ABSTRACT: The number of passenger cars equipped with a smart key system continues to increase due to the convenience of the system. A smart key system allows the driver to enter and start a car without using a mechanical key through a wireless authentication process between the car and the key fob. Even though a smart key system has its own security scheme, it is vulnerable to the so-called relay attacks. In a relay attack, attackers with signal relaying devices enter and start a car by relaying signals from the car to the owner’s fob. In this study, a method to detect a relay attack is proposed. The signal strength is used to determine whether the signal received is from the fob or the attacker’s relaying devices. Our results show that relay attacks can be avoided by using the proposed method.