Conference Key Agreement Protocol Based on Elliptic Curve

To improve the implementation efficiency of conference key agreement protocol with fault toler- ance,this paper presents a conference key agreement protocol with forward secrecy by using Elliptic Curve Digital Signature Algorithm and elliptic curve Diffie-Hellman key exchange protocol.Based on the intractability of the Elliptic Curve Discrete Logarithm Problem,honest participants can agree on a common conference key no matter how many malicious participants are,and passive adversaries get no information about the conference key established by honest participants.Compared with the existing schemes at the same security level,the proposed scheme requires much less computation and communication cost.