Publication Type

Journal Article

Version

acceptedVersion

Publication Date

6-2020

Abstract

In this paper, we consider the security issues in data sharing cliques via remote server. We present a public key re-encryption scheme with delegated equality test on ciphertexts (PRE-DET). The scheme allows users to share outsourced data on the server without performing decryption-then-encryption procedures, allows new users to dynamically join the clique, allows clique users to attest the message underlying a ciphertext, and enables the server to partition outsourced user data without any further help of users after being delegated. We introduce the PRE-DET framework, propose a concrete construction and formally prove its security against five types of adversaries regarding two security requirements on message confidentiality and unforgeability of attestation against the server. We also theoretically analyze and compare the proposed PRE-DET construction with related schemes in terms of ciphertext sizes and computation costs of encryption, decryption, ciphertext equality testing and re-encryption, which confirms the practicality of our construction.

Keywords

Confidentiality, Data attestation. Data outsourcing, Data sharing, Encryption, Equality test on ciphertexts, Re-encryption

Discipline

Databases and Information Systems | Information Security

Research Areas

Data Science and Engineering; Cybersecurity

Publication

Information Sciences

Volume

522

First Page

80

Last Page

98

ISSN

0020-0255

Identifier

10.1016/j.ins.2020.02.064

Publisher

Elsevier

Embargo Period

2-24-2021

Copyright Owner and License

Authors

Additional URL

https://doi.org/10.1016/j.ins.2020.02.064

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