Method for controlling file access on computer systems

Details Method for controlling file access on computer systems Method for controlling file access on computer systems

2006-06-05

2011-12-27

Najjar, Saleh (Department: 2492)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S165000, C713S167000, C713S187000, C713S188000, C713S189000, C726S002000, C718S001000, C380S026000, C711S006000

Reexamination Certificate

active

08086873

ABSTRACT:
A method for controlling file access on computer systems is disclosed. Initially, a virtual machine manager (VMM) is provided in a computer system. In response to a write request, the VMM determines whether or not a location field is valid. If the location field is not valid, then the VMM writes the write request information to a storage device; but if the location field is valid, then the VMM encrypts the write request information before writing the write request information to the storage device. In response to a read request, the VMM again determines whether or not a location field is valid. If the location field is not valid, then the VMM sends the read request information to a read requester; but, if the location field is valid, then the VMM decrypts the read request information before sending the read request information to the read requester.

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