Publication Type

Journal Article

Version

acceptedVersion

Publication Date

5-2022

Abstract

Outsourcing encrypted data to cloud servers that has become a prevalent trend among Internet users to date. There is a long list of advantages on data outsourcing, such as the reduction cost of local data management. How to securely operate encrypted data (remotely), however, is the top-rank concern over data owner. Liang et al. proposed a novel encrypted cloud-based data share and search system without loss of privacy. The system allows users to flexibly search and share encrypted data as well as updating keyword field. However, the search complexity of the system is of extreme inefficiency, O(nd), where d is the total number of system files and n is the size of query formula. This article, for the first time, leverages the "oblivious cross search" technology in public key searchable encryption context to reduce the search complexity to only O(nf(w)), where f(w) is the number of files embedded with the "least frequent keyword" w. The new scheme maintains efficient encrypted data share and keyword field update as well. This article further revisits the security models for payload security, keyword privacy and search token privacy (i.e., search pattern privacy) and meanwhile, presents security and efficiency analysis for the new scheme.

Keywords

Secure data search, share, flexible query, update, efficiency

Discipline

Information Security

Research Areas

Cybersecurity

Publication

IEEE Transactions on Services Computing

Volume

15

Issue

3

First Page

1619

Last Page

1633

ISSN

1939-1374

Identifier

10.1109/TSC.2020.3004988

Publisher

IEEE

Copyright Owner and License

Authors

Additional URL

https://doi.org/10.1109/TSC.2020.3004988

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