Security in VANETs with Insider Attack Resistance and Signature Aggregation

Vehicular Ad-hoc Networks (VANETs) are a type of network in which vehicles communicate with one another and exchange information so as to provide quality-of-life improvements to the vehicle users as well as the people belonging to the area. In VANET, vehicles share information such as the current status of the vehicle, the status of the traffic or the status of the road conditions to the other vehicles. All this information requires the network to be highly secure. Therefore various schemes have been proposed to secure the network. However, they suffer when a receiver has to verify multiple incoming message signatures. To reduce the verifying time and size of the signature The proposed scheme provides an efficient pairing-free aggregate signature, it will verify multiple messages by combining multiple signatures into a single signature called aggregate signature, and it is also resistant to insider attacks without using the tamper-proof device.