International Journal of Information and Computation Technology. ISSN 0974-2239 Volume 3, Number 6 (2013), pp. 533-538 © International Research Publications House http://www. irphouse.com /ijict.htm Hypervisor Security - A Major Concern 1 Nancy Arya, 2 Mukesh Gidwani and 3 Shailendra Kumar Gupta 1 Computer Science, Jagannath University, Jaipur. 2 Computer Science, Jagannath University, Jaipur. 3 Dept. of Physics, University of Rajasthan, Jaipur. Abstract In the last few decades, the world of computation moves for the cloud computing. Cloud computing is a new delivery model for enabling convenient ,on-demand network access of the computing resources .The cloud computing is one of today’s most exciting technologies, because it can reduce the cost and complexity of applications, and it is flexible and scalable. Virtualization is one of most important element that makes cloud computing. A key Part of virtualization is the all - powerful hypervisor which manages the physical platform and can access all of its resources. Security is the biggest problem in virtual environment. The security of a virtualization is heavily dependent on the hypervisor. If the management environment is compromised, all the virtual machines can be easily copied and modified. Furthermore, attacks from the management environment easily bypass the security mechanisms present in guest virtual machines due to the higher privilege level of the management operating system. Virtual Machine Monitor also called Hypervisor can be unsecure for the guest virtual machines. This paper looks at the hypervisor environment security attacks, possible solutions and precautions against these attacks to maintain security. Keywords: Cloud Computing, Virtualization, Virtual Machine Monitor, Hypervisor. 1. Introduction Cloud computing is model that makes reference to the two essential concepts: ‘abstraction’ and ‘virtualization’ to increase the capacity and capability of IT by