Abstract: The cloud computing is a technology used to organize and manage resources and services. Cloud based Web applications help for enabling convenient and on demand resource access with resource shared pool. Cloud Computing application provides platform for various computation, software access and data handling for betterment of proposed solution. Security is primary requirement to maintain trust and authenticity of information and services. This research work observes that there is big gap into security issue of existing system. Confidentiality, authentication, access control and integrity are the major ideology of security and one of the essential requirements for any software. This paper investigate existing solution for SaaS model of Cloud computing and explore the various flaw in context of security. Here, work concludes with the comparative study of different existing solution and address the common problems and excuses.`

Keywords: Cloud Computing, Security Issues, Hybrid Cloud, Security Techniques.