Cryptology ePrint Archive: Report 2003/062

Extending Joux's Protocol to Multi Party Key Agreement

Rana Barua and Ratna Dutta and Palash Sarkar

Abstract: We present a secure unauthenticated as well as an authenticated multi party key agreement protocol. The unauthenticated version of our protocol uses ternary trees and is based on bilinear maps and Joux's three party protocol. The number of rounds, computation/communication complexity of our protocol compares favourably with previously known protocols. The authenticated version of our protocol also uses ternary trees and is based on public IDs and Key Generation Centres. The authenticated version of our protocol is more efficient than all previously known authenticated key agreement protocols.

Category / Keywords: group key agreement, authenticated key agreement, pairing based cryptography, ID based cryptography.

Date: received 3 Apr 2003, last revised 15 Sep 2003

Contact author: ratna_r at isical ac in

Available format(s): Postscript (PS) | Compressed Postscript (PS.GZ) | BibTeX Citation

Version: 20030915:100919 (All versions of this report)

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