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Issue No. 04 - October-December (2006 vol. 3)
ISSN: 1545-5971
pp: 386-399
This paper studies key management, a fundamental problem in securing mobile ad hoc networks (MANETs). We present IKM, an ID-based key management scheme as a novel combination of ID-based and threshold cryptography. IKM is a certificateless solution in that public keys of mobile nodes are directly derivable from their known IDs plus some common information. It thus eliminates the need for certificate-based authenticated public-key distribution indispensable in conventional public-key management schemes. IKM features a novel construction method of ID-based public/private keys, which not only ensures high-level tolerance to node compromise, but also enables efficient network-wide key update via a single broadcast message. We also provide general guidelines about how to choose the secret-sharing parameters used with threshold cryptography to meet desirable levels of security and robustness. The advantages of IKM over conventional certificate-based solutions are justified through extensive simulations. Since most MANET security mechanisms thus far involve the heavy use of certificates, we believe that our findings open a new avenue towards more effective and efficient security design for MANETs.
Mobile ad hoc networks, security, key management, ID-based cryptography, secret sharing.

Y. Zhang, W. Lou, Y. Fang and W. Liu, "Securing Mobile Ad Hoc Networks with Certificateless Public Keys," in IEEE Transactions on Dependable and Secure Computing, vol. 3, no. , pp. 386-399, 2006.
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