A Study on the Security of Patch Management in a Cloud Computing Environment

As cloud computing techniques advance, Virtual Machines (VM) seems to be an appropriate solution than physical machine deployment. Having multiple instances of virtual machines cause more efficient use of computing resources to achieve the aim of energy consumption and cost effectiveness. In this thesis, Virtual Machine Image Catalogue (VMIC) is designed for helping users search and acquire expected virtual machine images promptly. Nevertheless, security of VMIC is also a crucial task to keep systems up-to-date and defends against security attacks. Pakiti is adopted to monitor patch status of physical and virtual machines, and schedules the warning information to remind security staffs to update the patches.