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A DFA-Based Functional Proxy Re-Encryption Scheme for Secure Public Cloud Data Sharing

Liang, Kaitai, Au, Man Ho, Liu, Joseph K, Susilo, Willy, Wong, Duncan S, Yang, Guomin, Phuong, Tran Viet Xuan and Xie, Qi (2014) A DFA-Based Functional Proxy Re-Encryption Scheme for Secure Public Cloud Data Sharing IEEE Transactions on Information Forensics and Security, 9 (10). pp. 1667-1680.

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— In this paper, for the first time, we define a general notion for proxy re-encryption (PRE), which we call deterministic finite automata-based functional PRE (DFA-based FPRE). Meanwhile, we propose the first and concrete DFA-based FPRE system, which adapts to our new notion. In our scheme, a message is encrypted in a ciphertext associated with an arbitrary length index string, and a decryptor is legitimate if and only if a DFA associated with his/her secret key accepts the string. Furthermore, the above encryption is allowed to be transformed to another ciphertext associated with a new string by a semitrusted proxy to whom a re-encryption key is given. Nevertheless, the proxy cannot gain access to the underlying plaintext. This new primitive can increase the flexibility of users to delegate their decryption rights to others. We also prove it as fully chosen-ciphertext secure in the standard model.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Computing Science
Authors :
Au, Man Ho
Liu, Joseph K
Susilo, Willy
Wong, Duncan S
Yang, Guomin
Phuong, Tran Viet Xuan
Xie, Qi
Date : 25 July 2014
DOI : 10.1109/TIFS.2014.2346023
Copyright Disclaimer : 1556-6013 © 2014 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See for more information.
Uncontrolled Keywords : Functional encryption; functional proxy; re-encryption; chosen-ciphertext security.
Depositing User : Jane Hindle
Date Deposited : 31 Oct 2017 15:29
Last Modified : 16 Jan 2019 19:03

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