密钥管理通过IP网络传输，结合PKI与智能卡技术，可以保证密钥传输的安全性和正确性。
Key management can make the key transporting on IP network safe and accurate greatly combining with PKI and smart card method.
为网络视频会议传输提供有效的通信安全，采用一个会议密钥分配的智能卡系统，来解决使用者身份认证和通信安全问题。
It presents smart card system of session key distribution for communications safety to net video conference transmission, resolves user identity authentication with security.
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