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:
Jul. 31, 2018
Filed:
Aug. 11, 2016
International Business Machines Corporation, Armonk, NY (US);
Michael Baessler, Neckartenzlingen, DE;
Jochen Doerre, Boeblingen, DE;
Thomas A. P. Hampp-Bahnmueller, Stuttgart, DE;
Philipp Hoffmann, Weil im Schoenbuch, DE;
Daniel Pittner, Steinenbronn, DE;
Werner Schollenberger, Holzgerlingen, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Providing an encrypted search index for performing searches on encrypted documents, the method comprising: (i) providing a set of documents, the documents comprising a plurality of unencrypted phrases; (ii) providing a master key; (iii) providing, based on the master key, for each phrase a set of encryption keys comprising one or more encryption keys; (iv) selecting, for each phrase, one encryption key of the set of encryption keys; (v) encrypting each phrase with the selected encryption key; and (vi) building an index based on the encrypted phrases, the index comprising information regarding which encrypted phrase is comprised within a certain document.