When a group of people want to communicate securely over an open network

they need to run a conference-key establishment protocol to establish a common conference key K such that all their communication thereafter are encrypted with the key K.By using the secret sharing scheme based on the MDS code as the basic component in this paper

we propose a new provably secure conference-key agreement protocol under the broadcast channel.In the protocol

a passive adversary gets no information about the conference-key established by the honest participants under the assumption of general Diffie-Hellman problem;and the honest participants can agree on a common conference-key no matter how many participants are malicious.