A Contribution to Secure the Routing Protocol "Greedy Perimeter   Stateless Routing" Using a Symmetric Signature-Based AES and MD5 Hash
  This work presents a contribution to secure the routing protocol GPSR (Greedy Perimeter Stateless Routing) for vehicular ad hoc networks, we examine the possible attacks against GPSR and security solutions proposed by different research teams working on ad hoc network security. Then, we propose a solution to secure GPSR packet by adding a digital signature based on symmetric cryptography generated using the AES algorithm and the MD5 hash function more suited to a mobile environment. 
Mohammed Erritali and Oussama Mohamed Reda and Bouabid El Ouahidi
cs.NI cs.DC