Journal
IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
Volume 7, Issue 6, Pages 1687-1694Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIFS.2012.2210880
Keywords
Outsourcing computations; electronic cash; verifiable encryption; ringers
Funding
- National Natural Science Foundation of China [60970144, 61100224]
- China 111 Project [B08038]
- Fundamental Research Funds for the Central Universities [K50510010003, K50511010001, JY10000901034]
- ARC [FT0991397]
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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.
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