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:
Apr. 07, 1992
Filed:
Oct. 12, 1990
Stephen M Matyas, Manassas, VA (US);
Dennis G Abraham, Concord, NC (US);
Donald B Johnson, Manassas, VA (US);
Ramesh K Karne, Herndon, VA (US);
An V Le, Arlington, VA (US);
Patrick J McCormack, Rockville, MD (US);
Rostislaw Prymak, Dumfries, VA (US);
John D Wilkins, Somerville, VA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A requested cryptographic function is validated for performance in conjunction with a cryptographic key, by inputting a first portion of an associated control vector into a first control vector checker, which outputs a first authorization signal if the requested cryptographic function has been authorized by the originator of the key. A second portion of the control vector is input to a second control vector checker, which outputs a second authorization signal if the requested cryptographic function has been authorized by the originator of the key. Both the first and the second authorization signals are applied to a cryptographic processor which initiates the execution of the requested cryptographic function.