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:
Aug. 30, 2011
Filed:
Dec. 21, 2007
Moritz Y. Becker, Cambridge, GB;
Jason F. Mackay, Redmond, WA (US);
Moritz Y. Becker, Cambridge, GB;
Jason F. Mackay, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Logical abduction is used to derive the premises that support an access query. In a logic-based access-control system, a query, as to one or more principals' right to access one or more resources, is a statement that can be either true or false. The statement evaluates to true if the principal is allowed to access the resource under the existing set of assertions. Assertions that, if made, would cause the statement to be true can be abduced from the query and from the policy against which the truth of the query is to be judged. The abduced assertions can be used to assist in making the appropriate assertions to cause the query to evaluate to true so that access to the resource can be granted.