自由的代价是永恒的警惕。
The price of freedom is eternal vigilance.
如果财富能够争取得到,即使让我手执马鞭去做一个车夫,我也去做,但如果追求不到,还不如去干我喜欢的事。
Cryptography is the art of transforming information into a form that is unintelligible to anyone who does not possess the key to unlock it.