Social Engineering

Social Engineering is to steal someone's passward or personal information by doing outrage
like flickering. Also, social engineering is called "social hacking" and "social cracking."
For example, a man who isn't a member of a company pretends to be a member
and he invades in company. Then, he steals company's information by asking questions and picking garbages that has company's passward.
Another example, a man calls someone's home and then, he asks about this home's personal
information to from a child.