Message authentication scheme for mobile ad hoc networks

As wireless ad-hoc networks become feasible, security issues have been important. Because taping and the falsification are easy in a wireless network, and it is difficult to find the attacker, defenses are more difficult than in cable networks. Therefore, a message authentication scheme in wireless networks is becoming important. For wireless ad-hoc networks, it is necessary to reduce signature information, etc. which become overheads in narrow wireless communication. In addition, since an ad hoc network is often achieved with mobile terminals, a security scheme which does not need computation power and any complex mechanism is required. In this paper, we propose two efficient message authentication schemes which improve the performance of conventional schemes. In our scheme, the hash calculation time and overhead of the packet is less than the conventional method. The simulation results show that our schemes have a better packet authentication rate in a burst error environment than conventional methods.