A METHOD AND SYSTEM FOR MAINTAINING ACCESS SECURITY OF INPUT AND OUTPUT OPERATIONS IN A COMPUTER SYSTEM.

摘要

Disclosed is a computer system and a method under which a personal computer or a workstation may use commercial off-the-shelf software application packages with a commercially available operating system while providing features of multi-level security including mandatory access controls and propagation of classification levels and codewords when information is moved between documents. Users are allowed to manually reclassify documents (including downgrading) as necessary. The present invention may also be embodied to provide security when computer are on a network by means of a secure file server.