The document reviews various security attacks affecting Vehicular Ad Hoc Networks (VANETs), emphasizing the importance of security for user safety and privacy. It discusses multiple attack types, such as denial of service, jamming, and authentication-related threats, while highlighting the significance of encryption and authentication in securing communications between vehicles and infrastructures. The paper also proposes a feasible authentication method called ACPN to enhance privacy-preserving authentication within VANETs.