secret message

基本解释

I gave the king his tribute and I also told him that I needed to tell him a secret message from God, privately.
献完贡品以后，我告诉他，上帝说了一个秘密，让我私下转述他。
“Next, you dip a toothpick into the lemon juice, like this, ” I said. “And you write a secret message on plain white paper.”
“接着，用一根牙签沾上柠檬汁，像这样，”我说，“然后在白纸上写下一条秘密的消息。”
A research team at Harvard analyzed the secret message, and, according to Lafferty’s summary of its findings, it had never seen “sixteenth-century ink act as it does on that particular document.”
哈佛大学研究小组分析了秘密信息。根据拉弗蒂的调查结果摘要显示，没有哪个16世纪的墨水和“那个字条上的”一样。

You can brute force it and unfortunately, the so-called Caesar cipher is not very secure because if you assume, for our purposes in English alphabet with 26 characters, say all lowercase for all uppercase, my God, you only have to try like 24, 25, 26 possible rotations until you can figure out what his secret message is.
你可以强行解密但是不幸地是，所谓的凯撒密码不是很安全的,因为如果假设，对于我们的26个字符的字母表,指明所有的小写为大写，我的天，你只要试24，25次，26次就可以解答出,密文的内容。
哈佛公开课 - 计算机科学课程节选
It's a secret number so that if Julius Caesar scrambled his message with the key 13, well, then the recipient had better know what that number is or realistically, -- and this is why it's kind of hard to buy -- into some of these age old algorithms, -- what would an alternative approach be to figuring out Julius Caesar's messages to his generals if he didn't know that secret number was 13?
它是一个机密的数字，以至于,如果凯撒大帝使用密钥13加密了它的消息，然后接收者最好知道那个数字是什么,实际上--这就是为什么很难,破解这些古老的算法-,有什么变换方法使凯撒大帝的将军,可以解密凯撒大帝的消息，如果他不知道,那个机密数字是13呢？
哈佛公开课 - 计算机科学课程节选

Or try to decode the 14-page secret message Singh offers up in the appendix of his book.
FORBES: I've got a secret
Hidden inside the new Cyberpunk 2077 trailer is a secret message to fans.
FORBES: Move up http://i.forbesimg.com t Move down