The United States Secret Service is a federal law enforcement agency under the Department of Homeland Security. It was established in 1865, originally to combat counterfeit currency. Today, its primary missions include protecting the President, Vice President, and visiting foreign dignitaries, as well as securing major national events. In addition to its protective duties, the Secret Service investigates financial crimes, including credit card fraud and cybercrime. The agency employs a range of specialized techniques and technologies to safeguard the nation's financial infrastructure and ensure the integrity of the U.S. economy.