The security request of security multicast is different, including identity authentication, data authentication, data integrality, key updating etc.

安全多播系统对安全的需求比较复杂，包括身份认证、数据认证、数据完整性、密钥更新等多方面需求。

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Source authentication is the key and difficulty problem through the multicast. And it also become the basis and precondition for realizing the security multicast.

而组播数据源认证又是整个安全组播通信中的重点和难点问题，也是真正实现安全组播通信的基础和前提。

youdao

Source authentication is the key and difficulty problem through the multicast. And it also become the basis and precondition for realizing the security multicast.

而组播数据源认证又是整个安全组播通信中的重点和难点问题，也是真正实现安全组播通信的基础和前提。

youdao