Traditional Culture Encyclopedia - Hotel reservation - There used to be a data of 2000w, and it was only personal information. What's the use?

There used to be a data of 2000w, and it was only personal information. What's the use?

General personal information problems:

User name, password, ID card, mobile phone name, birthday.

These are important personal data, which are often used by so-called hackers on the Internet to complain about your QQ, or to get more information from you through social engineering.

If you are referring to the 2000W data of a hotel, then providing the corresponding relationship between name and ID card can be used to forge ID card, etc. ...