Hybrid Approach to Enhance Data Security on Cloud

Cloud computing is a label for the delivery of hosted services on the Internet. The first challenge in the cloud computing is security, and the second challenge is the large size of the file stored on the cloud. Today, cloud is in young age and used too much for storing the data. So, security is a major concern. Security endures a primary concern for businesses regarding cloud selection, usually public cloud selection. Public cloud service providers share their hardware infrastructure among the numerous customers, as the public cloud has an environment of multi-tenant. Multi-tenancy is an important feature of the cloud computing but also is prone to several vulnerabilities. From the end-user aspect, cloud computing looks very insecure from the perspective of privacy. In this paper, a technique REM (RSA algorithm, Elgamal algorithm, MD5 technique) is proposed by which we can provide better security to our data over the cloud. Unlike the previous techniques, which maintained only one pillar of security, this paper maintains two pillars of security, i.e., confidentiality and integrity along with reducing the size of the file.