M'hamed Chammem

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Services provided by vehicular Adhoc Networks (VANETs) would be impaired if faced to sybil attacks, by which malicious vehicles claim multiple identities at the same time. The prevention of these attacks, which could occur in or out of the Road Side Units (RSUs) coverage, is challenging, as it should meet a compromise between the ability to identify the(More)
The emerging technology of vehicular communication systems (VCSs) raises a number of technical challenges that need to be addressed. Particularly, security ranks at the top of these challenges. In fact, the plethora of services that can be provided using VCSs introduces new communication scenarios that require special security services. This paper tackles(More)
A Vehicular Ad-Hoc Network (VANET) is a form of Mobile ad-hoc network, to provide communications among nearby vehicles and between vehicles and nearby fixed roadside equipment. The key operation in VANETs is the broadcast of messages. Its main goal is to improve safety and comfort for passengers, but it can also be used for commercial applications. In this(More)
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