提出了三种可认证会议密钥分配方案：基于ＭＲ型数字签名、基于加强型ＥｌＧａｍａｌ签名及基于身份的会议密钥分配方案，并分析、讨论了各自的安全性．这三种方案的基本思路都是由会议主席产生会议密钥并秘密地传送给会议参加者，会议参加者可以对会议密钥及其签发者进行认证． Three schemes of conference key distribution are proposed: MR-based digital signature, enhanced ElGamal signature and identity-based conference key distribution scheme, and analyze and discuss their respective security. The basic idea of ​​these three schemes is that the chairman of the conference generates a conference key and sends the conference key to a conference participant in secret, and the conference participant can authenticate the conference key and the issuer thereof.