An Authenticated Broadcasting Scheme for Wireless Ad Hoc Network

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CNSR '04 Proceedings of the Second Annual Conference on Communication Networks and Services Research
Year:
2004

Citing 0
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Abstract

In this paper, we propose a pairing-based signcryptionscheme for authenticated broadcasting, which requires lesscomputation than a previously proposed scheme suggestingidentity-based cryptosystem for ad hoc networks. Dueto the dynamic nature of ad hoc networks, we allow nodesto generate their own broadcast keys for different groupsin the network and change those when associated groupsare changed. However, we ensure through our signcryptionscheme that broadcast keys would be implicitly controlledby the Trusted Authority (TA), and can be used foras long the private keys are issued. Our keys are basedon identities and do not use certificates. We also proposea non-probabilistic method for computing unique broadcastkeys for different groups. We use identity-based pairwisesymmetric keys as the building block for our broadcastscheme. Such keys are computed non-interactively by thenodes, which reduces communication overhead and simplifies key management in pairwise communication.