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:
Jan. 05, 1993
Filed:
Aug. 30, 1991
Phil C Yeh, Poughkeepsie, NY (US);
Dennis G Abraham, Concord, NC (US);
Donald B Johnson, Manassas, VA (US);
An Van Le, Manassas, VA (US);
Stephen M Matyas, Manassas, VA (US);
Rotislaw Prymak, Dumfries, VA (US);
Ronald M Smith, Sr, Wappingers Falls, NY (US);
John D Wilkins, Somerville, VA (US);
International Business Machines Corp., Armonk, NY (US);
Abstract
A working key of a certain key type is to be transmitted from a first system (having a first usage-control value associated with keys of the certain type) and a second system (having a second usage-control value associated with keys of the certain type). A translation control value, associated with the certain key type, is generated, functionally relating the first and second usage-control values. The translation control value is used in a cryptographic function to send or receive the working key between systems, the cryptographic function being designed to produce valid results when the correct translation control value, and usage-control values, are employed, and unpredictable results otherwise. Effectively, the first usage-control value is translated to the second usage-control value.