Research On Distributed Authentication Model Based On Trust Guarantee

Authentication is the basis of network security.The traditional authentication often uses centralized authentication mode.And the centralized server is used to provide identity authentication,establish trust relationship and manage related data.This authentication method is easy to make the central server become the bottleneck of performance and the target of malicious attack,and easy to cause single point failure.So the security of centralized authentication method is not high,and its scalability is poor.Nowadays,the distributed network is developing rapidly.The distributed network has no control center,and it has a flexible topology.The number of nodes in the distributed network is large.Therefore,centralized authentication not only has vulnerabilities in the traditional network,but also can not play a very good role in the distributed network.Thus distributed authentication is proposed.This paper proposes a distributed authentication model based on trust guarantee.Before the two nodes interact with each other,they use public key to authenticate identity.After the authentication is passed,the local node aggregates the direct interactive experience with the target node and evaluation of target nodes by other nodes to establish the trust relationship with the target node.The essence of distributed authentication is to disperse the work of authentication to each node in the network.The nodes authenticate and determine the credibility of other nodes by themself,which forms a dynamic "certification center".In order to promote the positive feedback of the nodes and prevent false evaluation,this paper introduces the guarantee mechanism of the financial field into the distributed authentication model.Guarantee nodes need to be responsible for their own evaluation,and accept the rewards and punishments measures according to the real situation of the evaluation.At the same time,in order to suppress the malicious attacks and encourage nodes to continue to provide good services,the incentive measures are implemented according to the target node of the interactive performance.In addition,the data transmitted between nodes are digitally signed,which ensures the confidentiality and integrity ofthe data.In this paper,a series of experiments are carried out to verify the performance of the proposed model.The experimental results show that the model has the advantages of low cost,strong expansibility,and can resist all kinds of attacks.