The Research On Security Distributed Storage System Based On Public Key Infrastructure

With the rapid development of Internet technology, the increasing user and massive data bring new challenges for the distributed storage technology. How to build a distributed storage system with large-scale, high scalability, reliability and security in a dynamic network environment is one of the hot test issues in recent years.The catalogue service model is one of the broad models in distributed system for application. In a catalogue service model, the centre location server becomes the bottleneck. Once the centre location server loses efficacy, the system based on the catalogue service model will not store data and gain data. Besides, because of the data storage in the model is not encrypted, the security of the catalogue service model is bad.Based on systematically summarizing the relevant works of distributed storage technology and current information security technology, this thesis focuses on the research of the related technologies of PKI and catalogue server model and has gained several achievements.The primacy work and contributions of this thesis include:●Combining the PKI technology with Chord algorithm, it puts forward a security distributed storage system model based on public key infrastructure.●For node loses efficacy of catalogue server, it puts forward an improved catalogue server model, storage algorithm and seek for the algorithm of the models.●For security of distributed storage system, it puts forward a security distributed storage system design plan based on PKI.●Based on the security distributed storage system model, the paper designs a prototype system and realizes the prototype system core function.Experimental results show that the security problem of security distributed storage system model can be resolved in a better way, and the stability of the system can be strengthened after using PKI & Chord algorithm.