including the <a rel="external" href="http://aws.amazon.com/ec2/" target="_blank">EC2 cloud allowed unauthorised users to perform administrative tasks. At an <a rel="external" href="http://crypto.cs.stonybrook.edu/ccsw11/" target="_blank">ACM workshop</a> on cloud security, a team of researchers from Germany's Ruhr University of Bochum led by professor Jörg Schwenk <a rel="external" href="http://idw-online.de/pages/en/news447281" target="_blank">reported<img class="icon" src="http://www.h-online.com/imgs/43/6/2/7/1/5/8/Germany_Flag_Icon-d68b037a35fb984d.png" alt="German language link" title="German language link" width="16" height="13" /> that attackers were, for example, able to start and stop virtual machines, and create new images and gateways, in an EC2