The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 1990
Filed:
Jun. 26, 1987
Vincent J Cina, Jr, Spring Valley, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method prevents an incorrect program version from being executed by a computer system. More specifically, a synchronization key is contained in a load module and is used to encrypt that load module which also contains a protected program. The encrypted load module with the protected program and synchronization key therein is stored in auxiliary storage. The synchronization key and program name are then placed in a table in a secure memory. When the program is requested for execution, the synchronization key in the protected table corresponding to the program name is used to decrypt the load module. The synchronization key in the load module is then extracted and compared with the synchronization key which is stored in a protected table and associated with the protected program. If the two synchronization keys are the same, then the decrypted protected program is loaded into the main memory for execution.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile