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. 27, 2012
Filed:
Feb. 25, 2010
Frank D. Mcsherry, San Francisco, CA (US);
Kunal Talwar, San Francisco, CA (US);
Frank D. McSherry, San Francisco, CA (US);
Kunal Talwar, San Francisco, CA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A query log includes a list of queries and a count for each query representing the number of times that the query was received by a search engine. In order to provide differential privacy protection to the queries, noise is generated and added to each count, and queries that have counts that fall below a threshold are removed from the query log. A distribution associated with a function used to generate the noise is referenced to determine a distribution of a number of times that a hypothetical query having a zero count would have its count exceed the threshold after the addition of noise. Random queries of an amount equal to a sample from the distribution of number of times are added to the query log with a count that is greater than the threshold count.