Exclusive: DHS investigating whether floor plans and other security information were exposed in ransomware attack on contractor

Homeland Security report details how teen hackers exploited security weaknesses in some of the world's biggest companies

US remains in 'heightened threat environment' with recent racist and ethnically motivated attacks, DHS says

DHS directs review of personnel with access to classified material in wake of Pentagon leak

Department of Homeland Security to Spend $700,000 Studying 'Radicalization' Through Games