This report provides a comprehensive overview of Vehicular Ad-hoc Networks (VANETs), focusing on their security challenges, potential attacks, and future research directions. It begins with an introduction to VANETs, their background, and the problems they aim to solve, followed by a detailed discussion of various security attacks such as Denial of Service, Sybil, and Man-in-the-Middle attacks. The report also explores the challenges in terms of network mobility, volatility, and scalability. It further delves into the security requirements for VANETs, including authentication, availability, privacy, integrity, and non-repudiation. The report then examines Vehicle-to-Vehicle (V2V) and Vehicle-to-Roadside (V2I) communication models, focusing on their security and privacy aspects, particularly in the context of wireless and cognitive radio technologies. The report concludes with a discussion of future research and perspectives in the field of VANETs, emphasizing the importance of trust and security in these networks.
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