Research On Hybrid Cloud Storage System Supporting PDP Protocol

In recent years,with the great improvement of network technology and the continuous advancement of the "Internet +" process,more and more individuals and organizations have chosen to deploy servers to the cloud,and store the information collected through various channels to the cloud.As the concept of cloud computing becomes more and more popular,public cloud storage services that are cheap and easy to expand have become the first choice.However,in recent years,data security incidents caused by cloud service provider's technology or management errors have occurred frequently,which has led people to focus on private cloud.Storage space of private cloud is limited.And it is difficult to expand storage space of private cloud.It is suitable for storing very few confidential files.Large-scale data storage services still need to be undertaken by the public cloud.Therefore,how to combine the advantages of private cloud and public cloud,and integrate them into the same architecture for organization and management,to provide users with secure data storage services,has become a key research topic in the field of cloud storage.In order to solve the security problems of public cloud storage services,this paper improves the existing data integrity checking algorithm and designs a hybrid cloud storage system supporting data integrity checking.The main work of this paper is as follows:(1)Detailed analysis of the requirements of the hybrid cloud storage system,and designing a hybrid cloud storage system architecture that supports data integrity verification for the possible security risks of the current cloud storage service,providing users with complete cloud storage services.At the same time,the use of hybrid cloud architecture and data integrity verification mechanism to ensure the security of user data.(1)The requirement of hybrid cloud storage system is analyzed in detail.Aiming at the potential security risks of current cloud storage service,a hybrid cloud storage system architecture supporting data integrity checking is designed.While providing perfect cloud storage service for users,the hybrid Cloud Architecture and data integrity checking mechanism are used to ensure the security of user data.(2)In order to make full use of the technical characteristics of hybrid cloud architecture,a data integrity checking algorithm supporting online/offline and dynamic updating features is designed and implemented,which transfers most of the computing overhead in data integrity checking process to private cloud and reduces the computing pressure of users.By replacing the signature scheme of traditional data integrity algorithm with chameleon signature,the online/offline generation of data block signature is realized.Based on the existing data structure of multi-branch authentication tree,a data structure of multi-branch authentication forest is designed,which reduces the huge cost of building authentication structure in dynamic update link.(3)The hybrid cloud storage system supporting data integrity verification is implemented.This scheme combines the technical characteristics of hybrid cloud architecture,improves the traditional data integrity verification mechanism,and applies the improved data integrity verification algorithm to hybrid cloud storage service system,effectively guarantees the integrity of cloud data,at the same time,improves the user's experience,and advances the practical application of hybrid Cloud Architecture and data integrity verification in the field of cloud storage.An effective scheme is provided.