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。
There are many Beths in the world, shy and quiet, sitting in corners till needed, and living for others so cheerfully that no one sees the sacrifices till the little cricket on the hearth stops chirping, and the sweet, sunshiny presence vanishes, leaving silence and shadow behind.
雪人在我的想象中早已存在，远早于他出现在纸上。
我们生活在时间中——它塑造并控制着我们——但我从未觉得自己真正理解它。
The bank is not a pawnshop, the bank is a credit intermediary.
尊敬自己的长辈，从而推广到尊敬别人的长辈；爱护自己的儿女，从而推广到爱护别人的儿女。
I'm not perfect, but I'm always me.