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A P2P Approach for Efficient Certificate Revocation in MANET

Author(s): Suresh Babu Tumula | K.R.R.Mohana Rao

Journal: International Journal of Computer Technology and Applications
ISSN 2229-6093

Volume: 03;
Issue: 01;
Start page: 392;
Date: 2012;
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Keywords: MANET security | Public-key cryptography | Trust model | Certificate revocation | Key management.

The issue of certificate revocation in mobile ad hoc networks (MANETs) where there are no on-line access to trusted authorities is a challenging problem. In wired network environments, when certificates are to be revoked, certificate authorities (CAs) add the information regarding the certificates in question to certificate revocation lists (CRLs) and post the CRLs on accessible repositories or distribute them to relevant entities. In purely ad hoc networks, there are typically no accesses to centralized repositories or trusted authorities; therefore the conventional method of certificate revocation is not applicable. Certificate revocation is one of the many challenges faced by Public Key Infrastructure (PKI). Certificate revocation is the action of declaring a certificate, which has not expired, is no longer valid due to various reasons ranging from change of relationship between certificate issuer and the public key owner to compromised private keys of the associated certificate to change of information contained in the certificate. All the revoked certificates by the certificate issuer must be made available to all the end-entities, which need to verify a certificate. Many schemes have been proposed for certificate revocation; each with its own strengths and weaknesses. Some of these schemes, although straightforward and easy to implement, suffer when faced with the challenge of efficient distribution of certificate revocation information. In this paper we look into the use of Peer-to-Peer (P2P) technology to effectively and efficiently distribute the revoked information.
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