This secret key is known only to the user and the security server.
此秘密密钥只有该用户和安全服务器知道。
The user supplies a secret key (password) to the security server to prove its identity.
用户向安全服务器提供一个秘密密钥（密码）来证明其身份。
Security server (primary and failover).
安全服务器(主服务器和故障转移服务器)。
Security server (primary and failover).
安全服务器(主服务器和故障转移服务器)。
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