This week, the Department of Homeland Security (“DHS”) issued three proposed rules expanding data security and privacy requirements for contractors and subcontractors. The proposed rules build upon other recent efforts by various federal agencies to strengthen safeguarding requirements for sensitive government information.  Given the increasing emphasis on data security and privacy, contractors and subcontractors are well advised to familiarize themselves with these new requirements and undertake a careful review of their current data security and privacy procedures to ensure they comply.