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A Conditional Proxy Broadcast Re-Encryption Scheme Supporting Timed-Release

Liang, Kaitai, Huang, Qiong, Schlegel, Roman, Wong, Duncan S. and Tang, Chunming (2013) A Conditional Proxy Broadcast Re-Encryption Scheme Supporting Timed-Release In: ISPEC 2013: 9th International Conference on Information Security Practice and Experience, 12-24 May 2013, Lanzhou, China.

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To allow a delegator not only to delegate the keywordcontrolled decryption rights of a broadcast encryption to a set of specified recipients, but also to control when the decryption rights will be delegated, in this paper, for the first time, we introduce a new notion called Timed-Release Conditional Proxy Broadcast Re-Encryption (TRCPBRE). We also propose a concrete construction for TR-CPBRE which can be proven selective identity adaptive CCA secure under the (P,Q, f)- general decisional Diffie-Hellman exponent assumption, and chosen-time period chosen-ciphertext secure under the bilinear Diffie-Hellman assumption. When compared with the existing CPBRE and Timed-Release Proxy Re-Encryption (TR-PRE) schemes, our scheme achieves better efficiency, and enables the delegator to make a fine-grained delegation of decryption rights to multiple delegatees.

Item Type: Conference or Workshop Item (Conference Abstract)
Divisions : Faculty of Engineering and Physical Sciences > Computing Science
Authors :
Date : May 2013
Identification Number : 10.1007/978-3-642-38033-4_10
Copyright Disclaimer : © Springer-Verlag Berlin Heidelberg 2013
Uncontrolled Keywords : timed-release encryption unidirectional conditional proxy broadcast re-encryption bilinear map
Additional Information : Part of the Lecture Notes in Computer Science book series
Depositing User : Karen Garland
Date Deposited : 22 Nov 2017 13:38
Last Modified : 22 Nov 2017 13:38

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