Problems in cloud security Hypervisor protect the cloud platform by virtualization, but who protects VM, A pp, user s data Computing resources are leased from cloud platform not owned by user. Hypervisor/os has absolute privileges of vM, app, data. App tself cannot resist os's attack Hypervisor/OS may not be trustableProblems in cloud security • Hypervisor protect the cloud platform by virtualization, but who protects VM, App, user’s data ? • Computing resources are leased from cloud platform, not owned by user. • Hypervisor/OS has absolute privileges of VM, app, data. App itself cannot resist OS’s attack • Hypervisor/OS may not be trustable