Title:
EFFICIENT AND VERIFIABLE MULTI-KEYWORD SORTING SEARCHABLE ENCRYPTION METHOD SUPPORTING PREFERENCE SEARCH AND LOGICAL SEARCH
Document Type and Number:
WIPO Patent Application WO/2019/165880
Kind Code:
A1
Abstract:
Disclosed is an efficient and verifiable multi-keyword sorting searchable encryption method supporting preference search and logical search. A data owner encrypts a document and constructs a ciphertext index based on a document collection, and generates summary information of the document by using a key and a document content and then sends to a cloud server a ciphertext document and the encrypted index and summary information; a data user shares key information generated by the data owner, and generates a query trapdoor according to the query and sends to the cloud server the encrypted query trapdoor and the number K of documents to be acquired; after receiving the ciphertext index and the query trapdoor, the cloud server executes a secure inner product operation, searches for the K documents most relevant to the user query and sorts same according to the related scores with the query, then generates a verification object, and finally returns the most relevant K documents and the verification object to the data user;
and the data user verifies the accuracy and completeness of the returned results by means of a verification algorithm.
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Inventors:
TANG SHAOHUA (CN)
HE ZHIQIANG (CN)
HE ZHIQIANG (CN)
Application Number:
PCT/CN2019/074061
Publication Date:
September 06, 2019
Filing Date:
January 31, 2019
Export Citation:
Assignee:
UNIV SOUTH CHINA TECH (CN)
International Classes:
G06F21/60; G06F16/24; H04L29/06
Foreign References:
| CN108388807A | 2018-08-10 | |||
| CN105812141A | 2016-07-27 | |||
| CN106326360A | 2017-01-11 | |||
| CN104615692A | 2015-05-13 |
Other References:
HONGWEI L I: "Enabling Fine-Grained Multi-Keyword Search Supporting Cla- ssified Sub-Dictionaries over Encrypted Cloud Data", IEEE TRANSACTIONS ON DEPENDABLE AND SECURE COMPUTING, vol. 13, no. 3, 30 June 2016 (2016-06-30), pages 315 - 319, XP011610236
Attorney, Agent or Firm:
GUANGZHOU HUAXUE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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