Browse Prior Art Database

Software Protection by Decryption on Multi-Usage Serial Interface

IP.com Disclosure Number: IPCOM000062044D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Canova, FJ [+details]

Abstract

This article describes an arrangement for decrypting and protecting software without using precious system option slots. This is accomplished by using an existing serial keyboard port. Software copy protection is a necessary technique used to protect the development investment made by software vendors. The diskette- based protection schemes in use are being defeated by easy to use bit copy tools. It has become apparent that a new encryption/decryption technique based on hardware is needed in order to protect the software better. The technique described herein is a unique low-cost hardware method of attaching decryption hardware to a personal computer. This hardware is referred to as a lock. The lock is a hardware addition to a personal computer (PC) which will protect software from being used without authorization.