In this paper, the self-organized public-key management scheme proposed for MANETs is considered in order to guarantee that all nodes play identical roles in the network. Our approach involves that the responsibility for creating, storing, distributing and revoking nodes' public-keys is on the nodes themselves. In particular, the methods here described and evaluated are aimed at improving the process of building the local certificate repositories associated to each node in the self-organised model. In order to do it, we face the problem by combining known authentication elements such as the web-of-trust concept, together with common ideas of routing protocols, such as the MultiPoint Relay technique used in the Optimized Link State Routing protocol. Our proposal leads to a significant improvement in the efficiency of the whole model and implies a good trade-off among security, overhead and flexibility. Results of experiments show an important reduction in resource consumption while undertaking the certificate verification process associated to the authentication.
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