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:
Mar. 01, 2011
Filed:
May. 31, 2007
Carl Melvin Ellison, Seattle, WA (US);
Paul J. Lach, Seattle, WA (US);
Butler Wright Lampson, Cambridge, MA (US);
Melissa W. Dunn, Woodinville, WA (US);
Ravindra Nath Pandya, Clyde Hill, WA (US);
Charles William Kaufman, Sammamish, WA (US);
Carl Melvin Ellison, Seattle, WA (US);
Paul J. Lach, Seattle, WA (US);
Butler Wright Lampson, Cambridge, MA (US);
Melissa W. Dunn, Woodinville, WA (US);
Ravindra Nath Pandya, Clyde Hill, WA (US);
Charles William Kaufman, Sammamish, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
The subject disclosure pertains to systems and methods that facilitate managing groups entities for access control. A negative group is defined using a base group, where the negative group associated with a base group includes any entities not included in the base group. Negative groups can be implemented using certificates rather than explicit lists of negative group members. A certificate can provide evidence of membership in the negative group and can be presented for evaluation to obtain access to resources. Subtraction groups can also be used to manage access to resources. A subtraction group can be defined as the members of a first group, excluding any members of a second group.