And cryptography involves scrambling information, converting what you a human can read into sort of nonsense that hopefully a bad guy cannot read.

密码包含不规则的信息，它把我们正常人能读懂的东西转化为,希望坏人读不懂的东西。

哈佛公开课 - 计算机科学课程节选

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 more complicated in making protein from an RNA strand and that complication is called the genetic code.

而从一条单链RNA翻译为蛋白,这个过程更为复杂,称之为遗传密码

耶鲁公开课 - 生物医学工程探索课程节选