You could make up messages and encrypt them, and your friend could use the code to decode the message.

您可以编制各种消息并对它们进行加密，您的伙伴可以使用暗号来解码这些消息。

youdao

You could make up messages and encrypt them, and your friend could use the code to decode the message.

您可以编制各种消息并对它们进行加密，您的伙伴可以使用暗号来解码这些消息。

youdao