Data General Corporation

Jon Frederick Spencer

Eric Scott Lewine

Michael Donovan Keene

William J Meyers

Millard Cranford Taylor, Ii

William James Meyers

Marc J Fraioli

Kenneth John Hayman

A system and method for controlling the access of users to a trusted computer system using an authentication and authorization database, containing information used to authenticate human users and information establishing what each user can do, and a number of software processes, including session initiation, authorization, credentials and database management daemons. The software processes are implemented in an independent fashion to prevent any process from performing an operation that would affect another process in an unauthorized way.

Secure computer system

A security system for a computer system imposes specific limitations on who has access to the computer system and to exactly what operations and data. Viruses are securely contained and prevented from expanding into areas where they can destroy stored programs or data. Viruses are also prevented from being introduced or executed in a large number of instances. The totality of computer functions is broken up into a set of events with an associated set of capabilities and different capabilities are assigned to each user depending on the particular job which that user is to do on the computer system. Also, security labels are placed on each data file and other system resources, and on each process. Further, a range of hierarchy/category labels (MAC labels) is assigned to each process to define a sub-lattice in which special capabilities can apply. Further, the hierarchy of labels is divided into a small number (for example 3) of regions, and a process operating in one region is generally not allowed to cross over into another region. Further, an owner of a data file is allowed to place restrictions on the file so that only users who posses certain privileges can gain access to the file.

Security system for computer systems

Growing community of inventors

Raleigh, NC, United States of America

Jon Frederick Spencer