When Internet moved from physically wired networks to wireless technology it became easier to hack and less secure because the encryption schemes are relatively simple.

当互联网从物理有线网络转移到无线技术时，由于加密方案相对简单，黑客攻击变得更容易且安全性更低。

A few centuries later, in World War II, the Nazis communicated using the Engima code, a much more complicated encryption scheme that they thought was unbreakable.

几个世纪后， 在第二次世界大战中， 纳粹使用 Engima 密码进行通信，这是一种他们认为牢不可破的更为复杂的加密方案。