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:
Jun. 20, 2000
Filed:
Nov. 19, 1997
James Irwin Knutson, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus for using a Digital Signature Algorithm (DSA) for providing licensing of software. Three steps are required to allow setting up a license, issuing a license and for customer update of the license. An initialization step generates a public and private key pair. A license generation step follows the initialization step and involves feeding the private key and data for the license terms through the DSA to create a digital signature. The digital signature hash value is distributed to the customer as a valid license. The customer performs license verification by running the signature, public key and data for the license through the DSA on the customer's machine.