Design And Implementation Of Ciphertext Distributed Cloud Storage Scheme Based On Blind Storage

With the development of cloud computing,cloud storage has become more and more widely used.However,cloud storage brings convenience to users and causes problems such as data insecurity,and security incidents of data leakage occur every year.For this reason,enterprises and individuals need to use a secure cloud storage system to prevent these events.However,for the current secure cloud storage system,there are still untrusted servers that can obtain specific information about files in the server through the access mode of the ciphertext data service.Therefore,access between the client and the cloud storage server must be prevented Pattern leakage.On the other hand,in the secure cloud storage system,the data is stored on the server in ciphertext,but it will cause the data to lose its original characteristics,especially the frequent operation and modification of large files,which greatly reduces the efficiency of updating the stored files.This article analyzes the characteristics of the existing cloud-oriented blind storage solution,which uses blinding technology to ensure that the server does not obtain storage data information through the access mode,but the blind storage solution still uses centralized storage,which requires too much load on the master node.,Leading to low performance of the storage system,and due to the avalanche effect of cipher text storage,it also leads to the problem of low file update efficiency.Therefore,in order to improve the problem of low storage system performance and low update efficiency in the blind storage scheme,combined with the incremental encryption algorithm and the Ceph distributed block storage scheme,an ciphertext distributed cloud storage scheme designed to achieve anti-access mode leakage is designed.In this paper,the incremental encryption algorithm is applied to the system architecture and dynamic interaction algorithm of the storage scheme,especially after the file is updated,the change of the cipher text file is controlled around the data block object near the modified content,and the avalanche effect of the encryption algorithm is controlled In a fine-grained data block object,the file update efficiency is improved.This article analyzes Ceph distributed storage and extends this ciphertext storage solution to a distributed block device storage solution with high performance,high reliability,and scalability.Finally,this paper implements a prototype system,and then compares the prototype system with the blind storage scheme in terms of file upload and download time consumption,encryption scheme storage overhead ratio and file update time consumption,and performs performance test analysis.Test results show that the prototype system takes less time to upload,download and update files than the blind storage solution.Although this system has a larger space overhead in the storage of the encryption scheme than the blind storage scheme,the overhead ratio through experimental analysis also meets the corresponding technical indicators.At the same time,it also greatly improves the efficiency of updating files,improves the performance of the storage system,and achieves the goal of efficient storage solutions.