<P> The United States Secret Service ( `` USSS '' or `` Secret Service '' ) is a federal law enforcement agency under the U.S. Department of Homeland Security , charged with conducting criminal investigations and protecting the nation 's leaders . Until 2003 , the Service was part of the U.S. Department of the Treasury , as the agency was originally founded to combat the then - widespread counterfeiting of U.S. currency . </P>
what are two duties of the us secret service
conducting criminal investigations protecting the nation 's leaders