VM researchers post rude awakening about virtualization security

(Phys.org)—A virtual machine stealing information from another virtual machine running on the same piece of hardware? That's not supposed to happen. Virtual machines run various tasks on a single computer rather than relying on a separate machine to run each one. The assumption is that one can't eavesdrop or tamper with the other. But now a technique reported in a paper, "Cross-VM Side Channels and Their Use to Extract Private Keys," by Yinqian Zhang of the University of North Carolina, Chapel Hill, and computer scientist colleagues from the University of North Carolina, University of Wisconsin, and RSA Laboratories, suggests a different story.

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