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. 21, 2013
Filed:
Sep. 29, 2010
Yuhui Zhong, Sammamish, WA (US);
Gregory Kostal, Kirkland, WA (US);
Tejas D. Patel, Seattle, WA (US);
Scott C. Cottrille, Sammamish, WA (US);
Vladimir Yarmolenko, Duvall, WA (US);
Pankaj Mohan Kamat, Kirkland, WA (US);
Sunitha Samuel, Kirkland, WA (US);
Frank D. Byrum, Seattle, WA (US);
Mayank Mehta, Redmond, WA (US);
Chandresh Kumar Jain, Sammamish, WA (US);
Edward Banti, Seattle, WA (US);
Yuhui Zhong, Sammamish, WA (US);
Gregory Kostal, Kirkland, WA (US);
Tejas D. Patel, Seattle, WA (US);
Scott C. Cottrille, Sammamish, WA (US);
Vladimir Yarmolenko, Duvall, WA (US);
Pankaj Mohan Kamat, Kirkland, WA (US);
Sunitha Samuel, Kirkland, WA (US);
Frank D. Byrum, Seattle, WA (US);
Mayank Mehta, Redmond, WA (US);
Chandresh Kumar Jain, Sammamish, WA (US);
Edward Banti, Seattle, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
The present invention extends to methods, systems, and computer program products for separating authorization identity from policy enforcement identity. Embodiments of the invention extend the consumption phase for protected information. Two identities, an authorization identity and a policy enforcement identity, are used for acquiring, issuing and enforcing usage license instead of one identity certificate. The authorization identity is used to evaluate against usage policy. The authorization identity is similar to identification information in an identity certificate. The policy enforcement identity is used to ensure the confidentiality of granted permissions and content key. The policy enforcement identity enforces a usage license on an authorization principal's (e.g., recipient's) machine. The policy enforcement identity's enforcement of a usage license is similar use of a cryptographic key in an identity certificate.