A secure and scalable group key exchange system
We present a Group Key Exchange protocol which extends in a natural way the Diffie-Hellman protocol. Our protocol is scalable: it has two rounds (for n > 2 parties) and the number of modular exponentiations per user is constant. It is secure against a passive adversary if the Diffie-Hellman problem is intractable. (c) 2005 Elsevier B.V. All rights reserved.
group key exchange diffie-hellman cryptography