Paper 2003/164
Identity-Based Threshold Decryption
Joonsang Baek and Yuliang Zheng
Abstract
In this paper, we examine issues related to the construction of identity-based threshold decryption schemes and argue that it is important in practice to design an identity-based threshold decryption scheme in which a private key associated with an identity is shared. A major contribution of this paper is to construct the first identity-based threshold decryption scheme secure against chosen ciphertext attack. A formal proof of security of the scheme is provided in the random oracle model, assuming the Bilinear Diffie-Hellman problem is computationally hard. Another contribution of this paper is, by extending the proposed identity-based threshold decryption scheme, to construct a mediated identity-based encryption scheme secure against more powerful attacks than those considered previously.
Note: This is a full version.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. A short version of this paper is to appear in the proceedings of PKC 2004.
- Contact author(s)
- joonsang baek @ infotech monash edu au
- History
- 2003-12-24: last of 6 revisions
- 2003-08-11: received
- See all versions
- Short URL
- https://ia.cr/2003/164
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2003/164,
author = {Joonsang Baek and Yuliang Zheng},
title = {Identity-Based Threshold Decryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2003/164},
year = {2003},
url = {https://eprint.iacr.org/2003/164}
}
