Methods, systems, and computer readable storage media for preventing side-channel attacks are disclosed. A computing resource, such as a virtual machine, operating on a computing device or within a computing environment may be duplicated. Properties associated with the computing resource and the duplicate computing resource may be monitored for discrepancies. The discrepancies may be indicative of a security event, such as a virus or side-channel attack. Detected security events may be handled by replacing a computing resource with a duplicate computing resource.