面向对等云存储网络的读写双向信任模型的研究

Research on the Read and Write Two-way Trust Model for P2P Cloud Storage Network

当前国内外对信任模型的研究均基于单向服务的对等网络,且难以抵抗"洗底"攻击。针对当前信任模型中对新加入网络的节点赋予固定的信任值,从而容易遭受"洗底"攻击的特点,提出了动态配置节点初始值的方法。同时,为了提高信任模型在网络存储领域应用的灵活性,提出存储信任值和数据读取信任值的概念,并通过存储偏好因子来调节两种信任值在最终结果中的比重,与其他对等网络存储信任模型相比,本模型配置更灵活,应用的范围更广。模拟实验表明,本模型较经典的Eigen Trust信任模型在大范围的"洗底"攻击下具有更高的交易成功率。

At present, most researches on the trust model are based on the one - way service, and it is difficult to resist the ＂cleaning record＂ attack. In this paper, according to the problem that being prone to ＂clean record＂ attack, we propose a new method to dynamically configure the initial value of the node in order to giving a fixed value of trust in the current trust model. At the same time, in order to improve the flexibility of the trust model in the field of network storage, the concept of storage trust value and data read trust value is proposed, and the specific gravity of two kinds of trust value in the final result is adjusted by memory preference factor. Compared with other peer to peer networks, the model is more flexible and more widely used. Simulation experiments show that the model is more successful than the classical EigenTrust model in resisting ＂clean record＂ attacks.