A New Authentication Protocol for Revocable Anonymity in Ad-Hoc Networks

A. Wierzbicki, A. Zwierko, and Z. Kotulski (Poland)

Keywords

Software Security, Adhoc Networks, Peertopeer Sys tems, Authentication, Revocable Anonymity.

Abstract

This paper describes a new protocol for authentication in ad-hoc networks. The protocol has been designed to meet specialized requirements of ad-hoc networks, such as lack of direct communication between nodes or need for revoca ble anonymity. At the same time, an ad-hoc authentication protocol must be resistant to spoofing, eavesdropping and playback, and man-in-the-middle attacks. The article ana lyzes existing authentication methods based on the Public Key Infrastructure, and finds that they have several draw backs in ad-hoc networks. Therefore, a new authentica tion protocol, basing on established cryptographic primi tives (Merkle’s puzzles and zero-knowledge proofs) is pro posed. The protocol is studied for a model ad-hoc chat ap plication that provides private conversations.

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