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Multi-User Security SYSTEM for a Personal Computer

IP.com Disclosure Number: IPCOM000038396D
Original Publication Date: 1987-Jan-01
Included in the Prior Art Database: 2005-Jan-31

Publishing Venue

IBM

Related People

Authors:
Willson, D Zolty, H [+details]

Abstract

Where a Personal Computer (PC) may be used by more than one user, it may be desirable to provide password protection against unauthorized use. Unauthorized use of the PC, or merely unauthorized access to the associated large-capacity rigid disk, is precluded by the Hardware Security System (HSS) described herein, which also provides for changing required passwords. During the power-up sequence of the PC, the present system executes code residing in Eraseable Programmable Read-Only Memory (EPROM) in response to entry of a password by the user, which also determines the level of access given to the user. Upon execution of the code, access to the entire system, or to the system without the rigid disk, is either allowed or denied. In either event, however, the EPROM is disconnected to preclude scanning for passwords.