Gold Codes are generated daily and provided by the National Security Agency (NSA) to the White House, The Pentagon, United States Strategic Command, and TACAMO. For an extra level of security, the list of codes on the card includes codes that have no meaning, and therefore the president must memorize where on the list the correct code is located. The concept behind the codes is that they permit the president to positively identify themself as the commander-in-chief and thereby authenticate a launch order to the National Military Command Center (NMCC).[7][8]