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:
Feb. 01, 2011
Filed:
Jan. 15, 2007
Aidan T. Hughes, Bellevue, WA (US);
Vladimir Tankovich, Bellevue, WA (US);
Aidan T. Hughes, Bellevue, WA (US);
Vladimir Tankovich, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Embodiments of the present invention relate to systems and methods to authenticate software licenses. One embodiment of the present invention comprises a method where a vendor creates a reversible hash from a known, predetermined seed value, encrypts the hash to generate a digital signature, and sends the digital signature to the customer. The customer enters the digital signature. The customer's client computer reverses the reversible hash to obtain a determined seed value. The client has access to the known seed value used by the vendor. The known seed value is compared to the determined seed value. If the seed values compare, the software license and the associated software is authenticate.