Abstract: Wireless conference call has become a research hotspot due to its economy，convenience and uncertain location of the participants.The ability to protect and authenticate the identity of participants in wireless conference call application is critical.In this paper，a new protocol presented for wireless conference key setup integrates symmetric key encryption，hashing and （t，n） secret shared together.To start a new conference，at least t participants have to be active and broadcast their shares.This protocol provides mobile participants with user identity anonymity and authentication during the conference call.According to the importance of the meeting and the connection of the wireless network，the chairperson can set an appropriate value for its corresponding t.Compared with Zhong’s protocol，this protocol has better availability and wider application.

Key words: conference call, （t, n） secret shared, anonymity, authentication

摘要： 无线电话会议由于具有不受地域限制、经济和方便等优点，使得它成为一个研究热点。在无线电话会议中，对会议参与者的身份进行认证和匿名是非常重要的安全问题。将对称加密系统、单向的安全Hash函数和（t，n）秘密共享方案相结合，提出了一种建立无线电话会议密钥的新协议。协议较好地解决了用户认证性和匿名性问题，用（t，n）秘密共享方案保证了与会者人数不少于t。根据会议的重要性和无线网络的连接性，会议主持人可以设置合适的t值。与Zhong的方案相比，该协议具有更好的实用性和广泛的应用前景。

关键词: 电话会议, （t, n）秘密共享, 匿名, 认证