What is Social Engineering ?

I have no idea about "Social Engineering", so I looked for it by the Internet.

Social Engineering is getting target's password irregally and invading the computer without harming computer itself.
According to the IT terminology dictionary, e-Words, Social Engineering is getting important information of security such as passwords by measures such as social storytelling, eavesdropping, and stealing through managerial staff of net work.
There are some adroit ways.



・ Getting password from manegerial staffs by telephone with pretending to the users or customers

・ To steal password when the target is inputting the password to the screen
with standing back

・ To install irregal software, keylogger which record the input of keyboard
and to guess the password by the record

・ To glance, memorize, and transcribe a memo which is written password or ID

I cannot imagine how to do it without being detected by police.
I think the people who can do Social Engineering are clever and smart,
but they do not use their ability wisely.