The goal of cryptography is to make it so that the cost of breaking the system exceeds the value of the information protected.
解释:人不博览群书,不了解古今,不能识别世间事物,不知道是与非,就像盲人看不到颜色 、聋人听不到声音、鼻塞的人闻不到花香一样啊。
Great histories are written with ink and blood.