I don't believe in pessimism. If something doesn't come up the way you want, forge ahead. If you think it's going to rain, it will.

We don't read and write poetry because it's cute. We read and write poetry because we are members of the human race. And the human race is filled with passion. Medicine, law, business, engineering: these are noble pursuits and necessary to sustain life. But poetry, beauty, romance, love...these are what we stay alive for.

密码学是关于在存在对手的情况下进行通信的。