In the world of cryptography, the only secure system is the one that is never connected to any network.
For every dollar you spend purchasing something substantial, expect to pay a dollar in repairs, maintenance, or disposal by the end of its life.
为何一个人建了一堵墙,另一个人马上就想知道墙的另一边是什么?
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."