The first step to creating a sequence diagram is to determine whether the diagram will represent an interaction with an external or internal entity.

创建序列图的第一步是确定该图是否表示与外部或内部实体的交互。

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In the real world, the certificates are typically themselves signed by some trusted authority such as VeriSign or an internal entity so you know that the public key is legitimate.

在现实世界中，证书通常由一些受信任的机构(如versign)或者某个内部实体进行签名，这样您便可以知道公钥是合法的。

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In the real world, the certificates are typically themselves signed by some trusted authority such as VeriSign or an internal entity so you know that the public key is legitimate.

在现实世界中，证书通常由一些受信任的机构(如versign)或者某个内部实体进行签名，这样您便可以知道公钥是合法的。

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