Computer Terms "Social Engineering"

Social Engineering means that someone gets personal secret information to catch off the target carelessness. The purpose of the conduct is that the person gets the target's password by accessing the target's computer illegally, without damaging the computer itself. The following are three examples of means of Social Engineering. First example is that someone personates a systems administrator, and others, and the person pumps the password from the target. Second, someone stands behind the target, who is using a keyboard, and looks at the monitor or keyboard when the target inputs the password. Then the gazer knows the password of the target. Final example is that someone steals a look at a paper which is written the target's password. Also, now, these ways are used to know not only password but also the password of credit card of the target.