调用播放器的函数根据使用的播放器阅读消息。
The functions that call the players to read off the messages depend on the player you use.
但是，管理员不能阅读消息，这满足了合规性要求。
However, the message will be unreadable to the administrator, which addresseses the compliance requirement.
预期的接收者使用相应的私钥解密消息并阅读消息。
The intended recipient then decrypts the message with the corresponding private key and reads it.
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