When thinking about Cloud Security, think of virtual machines in a data center as resources.  And if you also think of security as an application, just like any other application, then security is a resource that you can scale up or down.  Virtual machines allow us to do things in the small, such as targeting a virtual machine to look for specific areas of security concern.   

For more on this concept, watch the interview with Martin Sadler, Director of Cloud and Security, HP Labs, Virtualization at the heart of security in the cloud, HP Cloud Summit, June 2011 in London.

Learn more about Cloud Security.