基于区块链的安全外包公平支付方案

Blockchain-based fair payment for secure outsourcing

外包服务是一种新型商业模式,可以解决资源受限用户的计算和存储等问题。外包服务中的公平支付受到国内外学者的广泛关注。目前,大多数外包支付方案基于可信第三方,且不能确保交易双方的公平性。文章方案无需可信第三方,基于区块链提出了一种安全外包公平支付方案,可实现外包支付中双方交易的安全性和公平性。即使双方存在争议,也无需引入可信第三方解决。其次,对所提方案进行安全性分析,证明所提方案的完整性、公平性、可追究性。最后,模拟实验评估了所提方案中参与方的计算代价。理论分析和实验结果均表明,所提方案不依赖于第三方即可保证公平性,且能防止用户和服务器的恶意行为,有利于保证系统的稳健性。

Outsourcing service is a new business model that can solve the problems of computing and storage for resource-constrained users.How to achieve fair payment in outsourcing services has attracted extensive attention from domestic and foreign scholars.At present,most outsourcing payment schemes are based on trusted third parties and cannot ensure the fairness of both parties to the transaction.First,without a trusted third party,a secure outsourcing fair payment scheme was proposed based on the blockchain,which could achieve the safety and fairness of both parties'transactions in outsourcing payment.Even if there was a dispute between the two parties,there was no need for a third party to resolve it.Secondly,we conducted a security analysis of the proposed scheme and proved the integrity,fairness and accountability of the proposed scheme.Finally,the simulation experiment evaluated the computational cost of the participants in the proposed scheme.The theoretical analysis and experimental results show that the proposed scheme can guarantee fairness without relying on third parties,and can prevent malicious behaviors of users and servers,which is conducive to ensuring the robustness of the system.