Vehicular Ad Hoc Networks (VANETs) are a type of wireless communication system that enables vehicles to communicate with each other and with roadside infrastructure. The papers reviewed in this assignment highlight the security challenges and solutions for VANETs. Issues such as black hole attacks, anonymous routing, and authenticated communication are addressed. Furthermore, the importance of cryptographic techniques and game-theoretic approaches is emphasized in mitigating network layer attacks. Additionally, the survey highlights the need for secure position-based routing, reliable tactics for detecting black hole attacks, and heterogeneous ad hoc networks.