Bitcoin-Based Anti-collusion Fair Payments for Outsourcing Computations in Cloud Computing

Duo Zhang, Xiaodong Zhang, Sheng Gao, Youliang Tian

Abstract: As an attractive cloud computing model, outsourcing computation often has a fair payment issues. In cloud computing, resource-constrained users outsource tasks and pay for them. However, the traditional outsourcing computation model can hardly resist the threat of collusion between calculators. In this paper, we propose a new scheme of Bitcoin-based anti-collusion fair payments for outsourcing computations (BAPay), give the architecture of BAPay, security requirements, and describe the design details. Besides, the scheme guarantees that an honest calculator will be paid for doing the calculations, regardless of the outsourcer’s behaviour. In addition, the security analysis shows that BAPay achieves completeness and fairness.