Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/35904
Title: A DFA-based functional proxy re-encryption scheme for secure public Cloud data sharing
Authors: Liang, KT
Au, MH 
Liu, JK
Susilo, W
Wong, DCS
Yang, GM
Phuong, TVX
Xie, Q
Keywords: Functional encryption
Functional proxy re-encryption
Chosen-ciphertext security
Issue Date: 2014
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on information forensics and security, 2014, v. 9, no. 10, p. 1667-1680 How to cite?
Journal: IEEE transactions on information forensics and security 
Abstract: 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.
URI: http://hdl.handle.net/10397/35904
ISSN: 1556-6013
EISSN: 1556-6021
DOI: 10.1109/TIFS.2014.2346023
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