Jethro通过目录中的数字证书发现Ellie的公开密钥并向她发送一条消息。

Jethro finds Ellie's public key published via a digital certificate in the directory and sends her a message.

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当ellie收到Jethro发出的消息时，她的Lotus Notes客户程序就会使用在一个目录中发布的包含Jethro的公开密钥的数字证书检查签名。

When Ellie receives the message from Jethro, her Lotus Notes client checks his signature via his digital certificate containing his public key that was published in a directory.

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发送方使用接收方的公开密钥(可以通过公开的数字证书得到)加密消息，然后接收方使用私钥解密消息。

The sender USES the recipient's public key (available via published digital certificates) to encrypt the message. The recipient then USES his private key to decrypt the message.

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