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Secure bidirectional proxy re-encryption for cryptographic cloud storage

Shao, Jun, Lu, Rongxing, Lin, Xiaodong and Liang, Kaitai (2015) Secure bidirectional proxy re-encryption for cryptographic cloud storage Pervasive and Mobile Computing, 28. pp. 113-121.

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Bidirectional proxy re-encryption allows ciphertext transformation between Alice and Bob via a semi-trusted proxy, who however cannot obtain the corresponding plaintext. Due to this special property, bidirectional proxy re-encryption has become a flexible tool in many dynamic environments, such as cryptographic cloud storage. Nonetheless, how to design a secure and efficient bidirectional proxy re-encryption is still challenging. In this paper, we propose a new bidirectional proxy re-encryption scheme that holds the following properties: (1) constant ciphertext size no matter how many times the transformation is performed; (2) master secret security in the random oracle model, i.e., Alice (resp. Bob) colluding with the proxy cannot obtain Bob’s (resp. Alice’s) private key; (3) replayable chosen ciphertext (RCCA) security in the random oracle model. The above three properties are usually required in the cryptographic cloud storage. Furthermore, the proposed new master secret security may be of independent interest, as it is closer to the original desire: delegate the decryption rights while keeping the signing rights.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Computing Science
Authors :
Shao, Jun
Lu, Rongxing
Lin, Xiaodong
Date : 2015
DOI : 10.1016/j.pmcj.2015.06.016
Copyright Disclaimer : © 2015 Elsevier B.V. All rights reserved.
Uncontrolled Keywords : Bidirectional proxy re-encryption; Replayable chosen-ciphertext attack; Master secret security; Multi-use; Constant size; Cryptographic cloud storage
Depositing User : Jane Hindle
Date Deposited : 31 Oct 2017 08:55
Last Modified : 16 Jan 2019 19:03

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