你可以在某一时间欺骗所有人；也可以在所有时间欺骗某些人；但你不可能在所有时间欺骗所有的人。

The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates.

The art of cryptography is to make the cost of breaking the system exceed the value of the information protected.