International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Josep Domingo-Ferrer

Publications

Year
Venue
Title
2011
ASIACRYPT
2010
EPRINT
Identity-Based Authenticated Asymmetric Group Key Agreement Protocol
Lei Zhang Qianhong Wu Bo Qin Josep Domingo-Ferrer
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.
2009
EUROCRYPT
1999
PKC
1993
EUROCRYPT
1990
EUROCRYPT
1989
EUROCRYPT

Program Committees

CHES 2010
Eurocrypt 1996