A Multi-Cloud Approach for Secure Data Storage Using Double Signature Based Cryptocraphy Ds-Sha256 Methodology in Cloud Cimputing

Abstract

Mobile devices are vulnerable to storing sensitive data because those stored data can be easily attacked or lost. Cloud storage is also not advisable because while uploading the data in the cloud, it can be captured easily; hacking the ID cloud data can be easily stolen, etc. We proposed an enhanced data storage secure mechanism for mobile cloud computing using a multi-cloud approach to overcome these issues. The proposed system inherits the various benefits of multi-clouds like data security using data cryptography, secure distribution using data compression, data splitting into segments, segment compression, segment distribution, and segment encryptions as single segments in the mobile memory. A double encryption algorithm with the combination of SHA256 with RSA, known as DS-SHA256, is implemented to secure those stored data. It secures the data extraction in the distributed segments with minimum energy consumption. The proposed multicloud DS-SHA256 performance is evaluated with existing fuzzy formal concept analyses (fuzzy FCA) and CSBAuditor on the aspect of security, time taken for uploading the file, downloading the file, encrypting the file and decrypting the file. The proposed DS-SHA256 overall performance and security are far better than the existing systems.