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Efficient Fair Conditional Payments for Outsourcing Computations

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3 Author(s)
Xiaofeng Chen ; State Key Lab. of Integrated Service Networks (ISN), Xidian Univ., Xi''an, China ; Jin Li ; Susilo, W.

The outsourcing computations in distributed environments suffer from the trust problems between the outsourcer and the workers. All existing solutions only assume the rational lazy-but-honest workers. In this paper, we first introduce the rational lazy-and-partially-dishonest workers in the outsourcing computation model. In addition, we propose a new fair conditional payment scheme for outsourcing computation that is only based on traditional electronic cash systems. The proposed construction uses a semitrusted third party T to achieve the fairness and efficiency. However, T is only involved in the protocol in the exceptional case, namely in the case of disputes. Moreover, since neither the secret sharing/splitting scheme nor the cut-and-choose protocol is used for the generation or verification of the payment token, our solution clearly outperforms the existing schemes in terms of efficiency.

Published in:

Information Forensics and Security, IEEE Transactions on  (Volume:7 ,  Issue: 6 )

Date of Publication:

Dec. 2012

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