National Protection and Programs Directorate (NPPD)
The Department of Homeland Security (DHS) division that leads the DHS mission to reduce risk to the Nation’s critical physical and cyber infrastructure through partnerships that foster collaboration and interoperability. (DHS FY13 Budget Guidance). NPPD contains the Federal Protective Service, the Office of Identity Management, the Office of Cybersecurity and Communications, the Office of Cyber and Infrastructure Analysis, and the Office of Infrastructure Protection.
Source: Starting Point: U.S. Election Systems as Critical Infrastructure, U.S. Election Assistance Commission, https://www.eac.gov/sites/default/files/eac_assets/1/6/starting_point_us_election_systems_as_Critical_Infrastructure.pdf