Browse Prior Art Database

Unauthorized Use Protection for a Computer

IP.com Disclosure Number: IPCOM000085190D
Original Publication Date: 1976-Mar-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Simpson, RG: AUTHOR [+2]

Abstract

A security system is described which allows only authorized personnel to either power on or load a large-scale digital computer.

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At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

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Unauthorized Use Protection for a Computer

A security system is described which allows only authorized personnel to either power on or load a large-scale digital computer.

In some large-scale data processing svstems, it is desirable to employ an auxiliary service processor in addition to the main central processing (CPU) and storage units. Such a service processor functions to provide various maintenance, diagnostic and service functions for the main CPU and storage units. In such a system, a security system can be installed that will not allow the main CPU and storage units to be powered up or turned on by unauthorized personnel. This concept can be readily extended to include such additional functions as initial microprogram load (IMPL) and initial program load (IPL). Such a security system is extremely flexible in that the data processing supervisor can change the authorization on a daily basis, by adding or deleting the authorization keys required to perform the various security protected functions.

The figure shows a typical implementation of the security system. The service processor 1 is a microprogrammed minicomputer having its own internal CPU and storage capability. The floppy disk 2 is a flexible magnetic recording disk, onto which is prerecorded the microprogram code and other IMPL data for the main CPU and storage units 3. Also recorded on the floppy disk 2 are various initialization instructions and procedures used in bringing up the main CPU and storage units 3.

In order to start the data processing system, power is applied to the service processor 1 by closing the master power...