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. 24, 2021
Filed:
May. 30, 2019
Kira Inc., Toronto, CA;
Samuel Peter Thomas Fletcher, Toronto, CA;
Alexander Karl Hudek, Toronto, CA;
KIRA INC., Toronto, CA;
Abstract
The present invention discloses a method of creating word-level differential privacy with the hashing trick to protect confidentiality of a textual data, the method comprising: receiving a list of a plurality of hashes with a weight (or weights) associated with each of the plurality of hashes; Updating said list with new hashes that are within the range of allowable hash values but not included in said received list of hashes; Updating said list with a new weight to each of said plurality of hashes that are missing said weight; Fitting a probability distribution to said list of said weights of said plurality of hashes; and generating said new weights and said adjusted weights based on sampling of said probability distribution.