该密钥将发件人的“纯文本”信息加密，然后在接收方进行解密，使他们可以读取或收听信息。

The key converts a sender's "plain-text" messages into encrypted form, then decrypts them at the receiver's end so the messages can be read or heard.

youdao

发送加密消息类似于使用信封而不是使用明信片给收信人发送信件；这使其他人很难读到您的信息。

Sending an encrypted message is like sending your correspondence in an envelope rather than a postcard; it makes it difficult for other people to read your message.

youdao

为了发送加密信息，你需要使用收件人的公钥和你的私钥组合。

To send an encrypted message, you need to use the recipient's public key in combination with your private key.

youdao