Natalia Castro Fernandes,  Otto Carlos Muniz Bandeira Duarte. 

This paper proposes a new mechanism to authenticate and monitor nodes in ad hoc networks (AMORA) that carries out access control without the need for a central administration entity. AMORA uses delegation chains to specify in a distributive way which users can access the network and it proposes the use of delegate nodes to issue certificates and to monitor nodes, avoiding malicious nodes from remaining on the network. Besides, AMORA treats efficiently network initialization and partitions. The results of the analysis shows that the mechanism is robust to Sybil and Collusion attacks and that it reduces the monitoring control load in each node in comparison with other mechanisms.

http://www.lbd.dcc.ufmg.br/colecoes/sbseg/2008/001.pdf

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