Because data warehouses have become a true treasure trove of personal and financial information of in some cases millions of people, these data warehouses have become prime targets of people who are intent on committing identity fraud. In short, if these criminals can somehow access the information and data that is contained in these electronic warehouses, they might be able to misappropriate millions and millions of dollars in a very short period of time. (You must keep in mind that in many ways identity theft has become a very big business.)
How Information is Removed from Data Warehouses
In this day and age there generally are three different manners in which data is removed illicitly from a data warehouse.
First of all, there remain very talented hackers in operation today who are still able to penetrate security defenses maintained by data warehouses. These people launch on attack on a data warehouse from the outside and remove personal and financial information.
Second, many instances involving the wrongful removal of information from a data warehouse involves the proverbial inside job in which a person with authority to access the information in a data warehouse does so for inappropriate purposes.
Finally, there are many instances when data warehouses negligently or accidentally release information that they maintain to third parties which ends up leading to widespread identity theft.