密码学中的挑战不仅仅是创建不可破解的代码，还包括创建即使技术发展也能保持安全的系统。
An excellent man; he has no enemies; and none of his friends like him.
A woman's guess is much more accurate than a man's certainty.
不要被别人的评价左右，做最真实的自己。