Paper 2013/115
A Conditional Proxy Broadcast Re-Encryption Scheme Supporting Timed-Release
Kaitai Liang, Qiong Huang, Roman Schlegel, Duncan S. Wong, and Chunming Tang
Abstract
To allow a delegator not only to delegate the keyword-controlled decryption rights of a broadcast encryption to a set of specified recipi- ents, 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 (TR-CPBRE). We also propose a concrete construction for TR-CPBRE which can be proven selective identity adaptive CCA secure under the (P; Q; f)-general de- cisional 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.
Metadata
- Available format(s)
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- timed-release encryptionbilinear map.
- Contact author(s)
- kliang4-c @ my cityu edu hk
- History
- 2013-05-06: last of 4 revisions
- 2013-02-27: received
- See all versions
- Short URL
- https://ia.cr/2013/115
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2013/115, author = {Kaitai Liang and Qiong Huang and Roman Schlegel and Duncan S. Wong and Chunming Tang}, title = {A Conditional Proxy Broadcast Re-Encryption Scheme Supporting Timed-Release}, howpublished = {Cryptology {ePrint} Archive, Paper 2013/115}, year = {2013}, url = {https://eprint.iacr.org/2013/115} }