On the Scalability of an Efficient "Nonscalable" Key Distribution Scheme

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Executive Summary

Some important requirements of key distribution schemes for many emerging applications involving resource constrained devices (For example, ad hoc and sensor networks) are low complexity; the ability to support unmediated establishment of security associations and scalability. This paper proposes a novel key distribution scheme based on an elegant scheme proposed by Leighton and Micali. While the scheme in was intended to be an alternative to Kerberos (Employing a trusted server for mediation), the proposed modifications are towards realizing a scheme for nonmediated establishment of pairwise secrets. The authors enumerate several compelling advantages of the proposed scheme over existing schemes in the literature.

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