The essence of cryptography is to allow communication in the presence of adversaries.

唯一真正的罪过是后悔。

没有中立的艺术。

在数学中，最简单的问题往往能引出最深刻的见解。

I don't believe in luck. I believe in hard work.

有比焚书更严重的罪行。其中之一是不读书。