Patent · US Active

Providing secure indexes for searching encrypted data

US9633219B2 · kind B2 · utility

5Cited by

1References

7Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Michael Baessler · Neckartenzlingen, DE
Jochen Doerre · Eppelheim, DE
Thomas Hampp-Bahnmueller · Stuttgart, DE
Philipp Hoffmann · Weil im Schönbuch, DE
Daniel Pittner · Steinenbronn, DE
Werner Schollenberger · Holzgerlingen, DE

Key dates

Filing date	Aug 26, 2015
Grant date	Apr 25, 2017
Priority date	—
Expiry date	Sep 29, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2463/062
WIPO fieldDigital communication
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.