Method and apparatus for controlling access to and corruption of

Details Method and apparatus for controlling access to and corruption of Method and apparatus for controlling access to and corruption of

1997-03-12

2000-07-18

Yoo, Do Hyun

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

713200, G06F 1216

Patent

active

060921617

ABSTRACT:
A method and apparatus for controlling access to and corruption of information in a computer system. In known "PC Virus" protection methods the boot partition becomes "Read Only" when the system is in Supervised Mode. However, Microsoft Windows, although not strictly self-modifying, does require that certain files located within the Windows directory, can be written to. Accordingly the present invention provides a method of controlling access to and modification of information stored on a storage medium forming part of a computer system comprising: dividing information stored on the storage medium into a plurality of non-overlapping partitions including a boot partition and at least one general partition, characterised by: designating at least one of said partitions a Write Many Recoverable (WMR) partition wherein, in use, if a write command is issued to overwrite any resident information stored in a/the WMR partition by updating information is written on the storage medium in a location other than where the resident information is stored and a (virtual) pointer to the updated information is set up/kept so that the updated information can be accessed, as required during a remainder of a session.

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