The fingerprint embedding is recently research key of information security in multicast environment.
多播环境下，指纹嵌入应用技术是目前信息安全研究的焦点。
The security requirements of multicast were presented, the advantages and disadvantages of presented schemes were analyzed, and several main research directions were pointed out as well.
指出了组播通信的安全要求，分析了现有组密钥方案的优缺点。
Dynamic security of group key distribution is always the key point and difficult point in the research field of multicast security.
群密钥分配的动态安全性一直是组播安全研究的重点和难点。
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