VERIFYING INTEGRITY OF BACKUP FILE IN A MULTIPLE OPERATING SYSTEM ENVIRONMENT

摘要

Provided is a technique to enhance security of a computer in a multi-OS operating environment. A memory image of a primary OS is in an active state, and a memory image of a secondary OS is in a non-active state. When switching is performed from the primary OS to the secondary OS, a runtime image is created, and a digest P is calculated and encrypted (C). When switching is performed from the secondary OS to the primary OS, a digest of the stopped runtime image is calculated. Only when comparison between the decrypted digest P and the calculated digest shows agreement, is switching of the primary OS allowed.

主权项

1. A method comprising:
in response to switching operation of a computer from a first operating environment to a second operating environment, encrypting a representative file enabling verification of identity of at least a portion of a first memory image, the first memory image corresponding to the first operating environment; saving the first memory image at a selected location; decrypting the encrypted representative file in response to switching operation from the second operating environment to the first operating environment; and comparing a file representative of the saved first memory image with the decrypted representative file.