identity theft, the use of one person's personal information by another to commit fraud or other crimes. The most common forms of identity theft occur when someone obtains another person's social security number, driver's license number, date of birth, and the like and uses it to open a fraudulent bank, credit card, cellular telephone, or other account, or to obtain false loans. Criminal identity theft, the most common nonfinancial type, occurs when someone gives another's personal information to a law enforcement officer when he or she is arrested. In addition to the financial losses resulting from identity theft, the person whose personal information has been used will have an erroneous credit or criminal history that is often expensive and time-consuming to correct. The occurrence of identity theft increased significantly beginning in the late 1990s due to the computerization of records and the ability to use another's personal information anonymously over the Internet.