It is a major contractor performing background checks for the U.S. government . The FBI is investigating , and the Department of Homeland Security said it has halted providing employee data to USIS for background checks until it can be assured the data wo n't be compromised . It said hackers breached its computer system ; FBI is investigating . It said experts ` ` believe it has all the markings of a state - sponsored attack '' Department of Homeland Security has halted providing employee data to USIS .
It is a major contractor performing background checks for the U.S. government . It said hackers breached its computer system ; FBI is investigating . It said experts ` ` believe it has all the markings of a state - sponsored attack '' Department of Homeland Security has halted providing employee data to USIS .