Abstract: Cloud computing is the most popular computing mode of Internet, which features elastic computing, resource virtualization and on-demand service, etc. In this environment, resources such as infrastructures, development platforms and applications are directly provided by could computing center. Users no longer own infrastructures, software and data themselves, but share entire cloud computing resources. hhis will affects security and availability of could computing environment, and leave it tremendous risks. Security flaws and threats of cloud computing were analyzed in this paper, and a design of computer forensic system based on cloud computing was presented, which resolves security problems of cloud computing using computer forensic techniques, and meets the need of high-performance computing using cloud computing and super computing technictues.

Key words: Cloud computing,Supcr computing,Computcr forensics