密码学的目标是使破解系统的成本超过受保护信息的价值。
过去从未消逝，它甚至从未过去。
O amor é a única coisa que cresce quando se reparte.
我不会让世界偷走我的平静。
The silliest woman can manage a clever man; but it needs a very clever woman to manage a fool.
No man's knowledge here can go beyond his experience.