黑客的世界是什么样的?他们用什么技术,那些工具来攻击其目标,他们的想法又是怎么样的,而我们又怎么样来防范黑客的攻击。 -Hackers of the world is like? What technology they use those tools to attack their targets, how they think they are kind, and so what we have to guard against hackers.