The data breach we’re talking about stems from a company called National Public Data. This organization, which gathers personal information for background checks and other purposes, was compromised by hackers. The stolen data was first offered for sale by a group known as USDOD, and later, a substantial portion of this data was leaked for free on a popular hacking forum. The information leaked includes names, addresses, Social Security numbers, and possibly even aliases, enough to cause a nightmare of identity theft and fraud.