¹School of Electrical Eng. & Computers Science, Kyungpook National Univ., Daegu, Korea
²Institute for Infocomm Research, 21 Heng Mui Keng Terrace, Singapore
³School of Electrical Eng. & Computers Science, Kyungpook National Univ., Daegu, Korea

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Abstract—Recently, Wang et al. proposed a set of double auction protocols with full privacy protection based on distributed ElGamal encryption. Unfortunately, their protocols are expensive in computation, and are not robust in dealing with system malfunction or user misbehavior. In this paper, we propose a secure and practical double auction protocols based on a hybrid trust model, where computation load is distributed to buyers and sellers while a semi-trusted manager handles the registration phase. A prominent feature of the proposed protocol is its high robustness, achieved by using a publicly verifiable secret sharing scheme with threshold access structure.

Index Terms—Double auction, security, trust model

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Cite: JungHoon Ha, Jianying Zhou, SangJae Moon, "Improved Double Auction Protocol based on a Hybrid Trust Model," Journal of Computers vol. 1, no.2, pp. 33-41 , 2006.