Identity-Based Authenticated Asymmetric Group Key Agreement Protocol

Lei Zhang; Qianhong Wu; Bo Qin; Josep Domingo-Ferrer

Paper 2010/209

Identity-Based Authenticated Asymmetric Group Key Agreement Protocol

Lei Zhang, Qianhong Wu, Bo Qin, and Josep Domingo-Ferrer

Abstract

In identity-based public-key cryptography, an entity's public key can be easily derived from its identity. The direct derivation of public keys in identity-based public-key cryptography eliminates the need for certificates and solves certain public key management problems in traditional public-key cryptosystems. Recently, the notion of asymmetric group key agreement was introduced, in which the group members merely negotiate a common encryption key which is accessible to any entity, but they hold respective secret decryption keys. In this paper, we first propose a security model for identity-based authenticated asymmetric group key agreement (IB-AAGKA) protocols. We then propose an IB-AAGKA protocol which is proven secure under the Bilinear Di±e-Hellman Exponent assumption. Our protocol is also efficient, and readily adaptable to provide broadcast encryption.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. The 16th Annual International Computing and Combinatorics Conference (COCOON 2010)
Keywords: Identity-Based Public-Key Cryptography Group Key Agreement Asymmetric Group Key Agreement Bilinear Map.
Contact author(s): lei zhang @ urv cat
History: 2010-04-19: received
Short URL: https://ia.cr/2010/209
License: CC BY

BibTeX

@misc{cryptoeprint:2010/209,
      author = {Lei Zhang and Qianhong Wu and Bo Qin and Josep Domingo-Ferrer},
      title = {Identity-Based Authenticated Asymmetric Group Key Agreement Protocol},
      howpublished = {Cryptology {ePrint} Archive, Paper 2010/209},
      year = {2010},
      url = {https://eprint.iacr.org/2010/209}
}