| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable easy switching of environments of two systems, a general operation environment and a confidential operation environment, on one client machine. <P>SOLUTION: A two-system client system includes means for storing and restoring a state of a virtual machine 102 on a physical memory 105, and means for redirecting write of data from the virtual machine onto a hard disk 106 to the physical memory. When an environment to be executed by the virtual machine is switched from a general operation environment to a confidential operation environment, processing of the virtual machine is frozen, and a state of the virtual machine at the time of the freezing is stored on the physical memory. Then, memory redirection is set to valid so that data write destination is the physical memory, and the virtual machine is restarted. When the environment is switched from the confidential operation environment to the general operation environment, the virtual machine is frozen, and a state of the virtual machine and data that is a target of the memory redirection is deleted. Then, the virtual machine is restored to a state right before the freezing, the memory redirection is set to invalid, and the virtual machine is restarted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
