Entropy as a new metric for denial of service attack detection in vehicular ad-hoc networks

Vehicular Ad hoc Networks (VANETs) aim to enhance driving conditions and provide with drivers and road users a high level of safety. Thus, they are exposed to several kinds of attacks, especially Denial Of Service attacks family (DOS) which affect the availability of services of authentic users. In this paper, we define "Packets entropy" as a new metric to be used for VANETs denial of service attack detection. We propose also a new detection scheme for this effect. Using "Packets entropy", the proposed method is able to detect VANET DOS attacks by the supervision of traffic traces during short monitoring periods. It presents the advantage of rapidity, to be executed by any node of the VANET network and does not require any modification of the 802.11p MAC layer protocol used as a standard for VANETs. Simulations show the high efficiency of the newly defined metric and the related proposed detection method.

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