A Mutual Approach to Reduce Cost And Enhance the Security From Client Side to Cloud Storage Side

摘要

This paper focuses on data leakage problem and its security in cloud storage technology. It has been seen that there are still some vulnerabilities in cloud storage which may results to compromise of C.I.A. This paper brings out, works on two phase of work to avoid data leakage problem, first phase is from client side and second phase is done by cloud provider side. The data which is stored by client in cloud storage application have different C.I.A. Some of them are Sensitive Having high confidentiality rating, some of them are least confidential but some of them have no confidentiality issue, which can have public access but require more integrity. In such situation, the data stored in cloud database with equal priority is not feasible. This paper has given a concept to store the data in database after prioritizing and then encrypting from client side itself. Before Uploading on cloud side, the client is required to mention criticality of that data. After Information declaration a matrix is prepared on basis of CIA analysis of data as desired by user which elaborates the criticality of data. Criticality is estimated on the basis of C.I.A. Confidentiality, Integrity and Availability. Based on sensitivity, data will be encrypted and access control list will be defined.. The second phase removes the problem of file access by another user who wants to access, as it is encrypted by client (owner). The proposed model addresses for reliability in storage systems (where the key component under investigation is to maintain the C.I.A.). Our observations and techniques are instrumental for a wide spectrum of systems, ranging from distributed storage systems for the enterprise to cloud data services.