面向结构化对等云存储平台的服务信任问题研究

The credibility of open P2P cloud storage service are facing significant challenges, due to the lack of centralized authentication and authorization center to ensure the reliability of QoS information sources and its highly open to allow storage nodes join or leave, service publication or revocation.We will study deeply centre on service trust problem, to meet the urgent needs for service trust and safety in structured P2P cloud storage platform.The effective two-way trust model will be designed, aimed at the trust evaluation information dilemma caused by feedback incentives deficiency in traditional trust models.The multi-attributes lookup algorithm under the control of single attribute will be proposed, after the trust mechanism be introduced to resource discovery process, to solve the problem of nonsupport in content or range based complex positioning.Because of the security flaws in the existing structured multi-signature scheme,a new structured signature scheme will be put forwarded with verifying signature parameter and all the signers’ public keys. In this way, the new scheme can resist attacks as mentioned thus to ensure the safety of trust data transmission process. The project can eliminate the security concerns in open P2P service environment, effectively improve the service quality and greatly enhance the service credibility of the P2P cloud storage system ,so as to promote the healthy development of the cloud storage industry.

在开放式对等云存储系统中既缺乏集中认证与授权中心来保障QoS信息来源的可靠性，又因其高度开放的特征允许存储节点自由加入或离开，服务发布或撤销等，服务的可信度面临着重大挑战。本项目面向结构化对等云存储平台对服务信任与安全的迫切需求，紧紧围绕服务信任问题进行深入的研究。针对传统信任模型反馈激励缺乏导致的信任评价信息困境，设计一种有效的双向信任模型；针对结构化对等系统无法支持基于内容、范围等资源复杂定位问题，将信任机制引入资源查找过程，提出单属性支配下的多属性查找算法；针对现存结构多重签名方案的安全性缺陷，设计可信的结构化多重签名方案，通过检验签名者的公钥和签名参数来防止伪造公钥、明文攻击，从而保证对等云存储系统信任数据传输过程的安全性。本项目研究，能有效提高对等云存储系统的服务质量，消除用户在开放式对等服务环境中的安全顾虑，大大提升对等云存储服务的可信度，从而推动云存储产业的健康发展。

针对开放式对等云存储系统中服务信任面临的重大挑战，本项目面向结构化对等云存储平台对服务信任与安全的迫切需求，紧紧围绕服务信任问题展开了深入的研究。针对传统信任模型反馈激励缺乏导致的信任评价信息困境，设计一种有效的双向信任模型；针对结构化对等系统无法支持面向数值型区间数描述的服务资源的复杂定位问题，将信任机制引入资源查找过程，提出单属性支配下的多属性查找算法；针对现存结构多重签名方案的安全性缺陷，设计信任注入的结构化多重签名方案，通过检验签名者的公钥和签名参数来防止伪造公钥、明文攻击，从而保证对等云存储系统信任数据传输过程的安全性。本项目的理论研究成果将在一定程度上提升对等云存储系统的服务质量，提高服务资源定位的准确性，确保信任数据传输的安全可靠性，从而推动云存储产业的健康发展。