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Authentication in Mobile Ad-Hoc Networks

Our studies show that there are performance and security problems with the existing authentication and keying mechanisms which are currently employed by wireless ad hoc networks. We propose a new authentication protocol, which solves those problems using a combination of well known cryptographic tools in RSA and Diffie-Hellman. In addition to the actual authentication, a new pairwise session is generated as a result of this mechanism. We also point out that without any central authority, e.g., a central server (which is the nature of ad hoc networks), our authentication scheme can be carried out securely by any node at any time.