Vehicular Ad-Hoc Networks (VANETs) has drawn great attention due to their potential role in enabling Intelligent Transportation System (ITS). VANETs using a connected-car technology forms an important part of ITS as it provides communication between different neighboring vehicles known as Vehicle-to-Vehicle Communication (V2V). In this paper, we have proposed an integrated simulation tool for modeling and testing traffic scenarios and V2V based applications. This integrated simulated environment is designed by combining two software packages, i.e., Simulation of Urban Mobility (SUMO) as traffic simulator and Network Simulator (NS3) for building dynamic network of nodes. It also enables us to implement and verify if a traffic management algorithm generates the desired effect. For evaluating our simulator, a vehicle crash prediction algorithm has been designed and tested which predicts the risk of a crash and alerts the vehicles to prevent collisions.

Vehicular Ad-Hoc Networks (VANETs) has drawn great attention due to their potential role in enabling Intelligent Transportation System (ITS). VANETs using a connected-car technology forms an important part of ITS as it provides communication between different neighboring vehicles and infrastructure. The architecture of VANETs includes vehicles and road side units (RSU) to provide secure communication and preventing its architecture from dangerous attacks various algorithms are discussed. A comparison between impacts of attacks on security and privacy of VANET is discussed. Therefore, we comprehensively presented the classification of attacks on the basis of their behavior, trust, architecture and infrastructure. Then their possible cryptographic solutions and analysis between them will be demonstrated. To ensure safety and security in VANETs different type of cryptographic schemes are introduced and their working are discussed. Three main solutions are discussed that are further applied with new technologies. As we have noticed from recent studies the growth in research and the application of these schemes in different projects and real time applications.