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。
The server sends the serialized credentials, including the sending server's identity for basic authentication, to the target server.
服务器将经过序列化的凭据(包括用于基本身份验证的发送服务器标识)发送给目标服务器。
Traditionally, Web sites have maintained their own authentication systems internally—including providing a user registry to store the end user’s digital identity.
过去，Web 站点常常在内部维护自己的身份验证系统，包括提供一个用户注册表来存储最终用户的数字身份。
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