"Private information" is the information that can identify an individual or may invade the privacy when it is known to others.
It is this that name, address, mail address, password, credit number and so on.
Nowadays there are many opportunity use the private information on the Internet.
For example, there are cases of use internet banking and Internet shopping.
You need to input your private information when you use these things.
That things that I give it now is an example, and because private information is worth being high, a lot of crime that to steal it occurs.
▲Your private information may be aimed by someone. Let's be careful.