Secure conference key distribution schemes for conspiracy attack

Authors:
Kenji Koyama
Affiliations:
NTT Communication Science Laboratories, Kyoto, Japan
Venue:
EUROCRYPT'92 Proceedings of the 11th annual international conference on Theory and application of cryptographic techniques
Year:
1992

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Abstract

At the Eurocrypt'88 meeting, we proposed three identity-based conference key distribution schemes. At the Asiacrypt'91 meeting, Shimbo and Kawamura presented a conspiracy attacking method which worked against our schemes to disclose a user's secret information. This paper proposes an improved identity-based conference key distribution scheme to counter this attack.