Ad Hoc Network Secure Group Communication Based On Elliptic Curve Cryptosystem

Ad hoc network is a mobile network without wired infrastructure support, formed by the mobile hosts. Each node is responsible for creating network topology, gathering routing information and forwarding packets in Ad hoc network.Ad hoc network multicast could reduce network transmission costs, network bandwidth and network latency, sending a message to multiple recipients at the same time. It has been widely applied.Ad hoc network multicast confidentiality and access control is an important part of the Ad hoc network security. It could be implemented by Ad hoc network secure group.ECC (Elliptic Curve Cryptosystem) is based on the elliptic curve discrete logarithm problem, that is, ECDLP and it is a more secure public key cryptosystem now. Key is very short and main operation is the point addition in the elliptic curve cryptosystem, so ECC has great advantages in the computation and time complexities.Two group key management algorithms based on ECC have been proposed in this paper. These two algothms could calculate the public key from users'identities, so we don't require store many CA(Certificate Authority) certificates in the every node in of Ad hoc network. It improves the security and computation performance of Ad hoc network multicast.