
The Bureau of Diplomatic Security, commonly known as Diplomatic Security (DS), is the security branch of the
United States Department of State
The United States Department of State (DOS), or State Department, is an United States federal executive departments, executive department of the Federal government of the United States, U.S. federal government responsible for the country's fore ...
. It conducts international investigations, threat analysis,
cyber security
Computer security, cybersecurity (cyber security), or information technology security (IT security) is the protection of computer systems and networks from attack by malicious actors that may result in unauthorized information disclosure, th ...
,
counterterrorism
Counterterrorism (also spelled counter-terrorism), also known as anti-terrorism, incorporates the practices, military tactics, techniques, and strategies that governments, law enforcement, business, and intelligence agencies use to combat or el ...
, and protection of people, property, and information. Its mission is to provide a safe and secure environment for officials to execute the
foreign policy of the United States
The officially stated goals of the foreign policy of the United States of America, including all the bureaus and offices in the United States Department of State, as mentioned in the ''Foreign Policy Agenda'' of the Department of State, ar ...
.
Overview
The Bureau of Diplomatic Security (DS) is the political face and parent organization of the
Diplomatic Security Service
The Diplomatic Security Service (DSS or DS) is a security and law enforcement agency that acts as the operational division of the Bureau of Diplomatic Security, which is a branch of the United States Department of State. Its primary mission is ...
(DSS). The DSS consists of over 2,000 Special Agents who are responsible for protecting visiting foreign dignitaries and U.S. diplomatic missions abroad. The DSS is the primary conduit utilized by the Bureau of Diplomatic Security and the Department of State for the majority of all security and law enforcement matters. Both acronyms (DS and DSS) are used interchangeably within the State Department and other agencies.
The
Assistant Secretary of State for Diplomatic Security is in charge of the Bureau of Diplomatic Security. Under the Assistant Secretary of State are several Deputy Assistant Secretaries; the Principal Deputy Assistant Secretary is the Director for the Diplomatic Security Service. The Director for the DSS is the top-ranking, active special agent in the DSS and leads a force of Special Agents,
Diplomatic Couriers, Security Engineering Officers, and Security Technical Specialists. Special Agents are sometimes referred to as "DS Agents" or "DSS Agents". Both terms are used interchangeably within the organization and other agencies.
For people who do not work for the Department of State (DOS), there is much confusion about the relationship between DS and DSS. Even within the Department of State, there is still some confusion regarding the difference between the two entities. The DSS is structured as a
law enforcement agency that is primarily made up of federal
special agents, and the DSS acts as the operational division of the Bureau of Diplomatic Security.
Overseas, DS develops and implements security programs to safeguard all personnel who work in every U.S. diplomatic mission around the world and to protect classified information at these locations. The DS presence overseas is led at each post (
embassy
A diplomatic mission or foreign mission is a group of people from a state or organization present in another state to represent the sending state or organization officially in the receiving or host state. In practice, the phrase usually deno ...
) by a DSS Special Agent who is referred to as a
Regional Security Officer, or more commonly as the RSO, and who serves as the senior law enforcement and security
attaché
In diplomacy, an attaché is a person who is assigned ("to be attached") to the diplomatic or administrative staff of a higher placed person or another service or agency. Although a loanword from French, in English the word is not modified accord ...
. In the United States, DS protects the
Secretary of State, the
U.S. Ambassador to the United Nations
The United States ambassador to the United Nations is the leader of the U.S. delegation, the U.S. Mission to the United Nations. The position is formally known as the permanent representative of the United States of America to the United Nations ...
, and foreign dignitaries/
diplomat
A diplomat (from grc, δίπλωμα; romanized ''diploma'') is a person appointed by a state or an intergovernmental institution such as the United Nations or the European Union to conduct diplomacy with one or more other states or internati ...
s who visit the United States. DS has protected
Yasser Arafat
Mohammed Abdel Rahman Abdel Raouf al-Qudwa al-Husseini (4 / 24 August 1929 – 11 November 2004), popularly known as Yasser Arafat ( , ; ar, محمد ياسر عبد الرحمن عبد الرؤوف عرفات القدوة الحسيني, Mu ...
, the
Dalai Lama
Dalai Lama (, ; ) is a title given by the Tibetan people to the foremost spiritual leader of the Gelug or "Yellow Hat" school of Tibetan Buddhism, the newest and most dominant of the four major schools of Tibetan Buddhism. The 14th and current Dal ...
, and
Prince Charles
Charles III (Charles Philip Arthur George; born 14 November 1948) is King of the United Kingdom and the 14 other Commonwealth realms. He was the longest-serving heir apparent and Prince of Wales and, at age 73, became the oldest person to ...
. The agency develops and implements security programs to protect the more than 100 domestic State Department facilities as well as the residence of the Secretary of State.
In addition to investigating crimes involving passport and visa fraud, DSS agents are engaged in other types of investigation. In cooperation with appropriate U.S. agencies such as the FBI and the CIA, DSS investigates the activities of foreign intelligence agencies directed against Department employees. At the request of other law enforcement agencies, DSS assists in apprehending fugitives who have fled the United States. Personnel security background investigations are conducted on all employees, applicants, and contractors seeking employment with the Department. Intelligence investigations look into terrorist incidents and threats made against State Department employees and facilities throughout the world.
Since 1984, DS has administered the
Rewards for Justice Program The Rewards for Justice Program (RFJ) is the counterterrorism and counterintelligence platform administered by the U.S. Department of State's Diplomatic Security Service agency. The Rewards For Justice program is seeking information leading to th ...
, which pays monetary rewards of up to $5 million, or in recent years even more, upon special authorization by the Secretary of State, to individuals who provide information which substantially leads to the countering of terrorist attacks against United States persons. Through 2001, $62 million had been paid to over forty people in this effort.
History
Bureau of Secret Intelligence

The Department of State's
Diplomatic Security Service
The Diplomatic Security Service (DSS or DS) is a security and law enforcement agency that acts as the operational division of the Bureau of Diplomatic Security, which is a branch of the United States Department of State. Its primary mission is ...
was formally established in 1916 under Secretary of State
Robert Lansing. The office was headed by a chief special agent, who also carried the title of special assistant to the secretary and reported directly to the secretary on special matters.
A handful of agents worked out of two locations,
Washington, D.C. and
New York City
New York, often called New York City or NYC, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the most densely populated major city in the U ...
, operating on confidential funds from the secretary's office. They conducted sensitive investigations, especially on the operations of foreign agents and their activities in the United States. The Diplomatic Security Service was known as the
Bureau of Secret Intelligence The Bureau of Secret Intelligence (Office of the Chief Special Agent) was founded in 1916. The U.S. Department of State's Bureau of Secret Intelligence, later known as the Office of Security (SY) and now as the U.S. Diplomatic Security Service, was ...
at its inception in 1916. The Bureau of Secret Intelligence was also known as U-1, an off-the-books adjunct to the Division of Information. Before the United States entered World War I, German and Austrian spies were conducting operations in New York City. The spies were using forged or stolen identity papers. President Woodrow Wilson authorized the Secretary of State to establish a security arm of the Department of State. Three agents were recruited from the
United States Secret Service
The United States Secret Service (USSS or Secret Service) is a Federal law enforcement in the United States, federal law enforcement agency under the United States Department of Homeland Security, Department of Homeland Security charged with co ...
because of their experience with counterfeit documents. Since the
U.S. Postal Inspection Service (USPIS) had the best laboratory, the director of the new agency was recruited there.
The assumption is that the name "Office of the Chief Special Agent", which was sometimes used in 1916, and to this day by various information portals to include the Department of State's website, to downplay the bureau's original mission.
In 1918, the
United States Congress
The United States Congress is the legislature of the federal government of the United States. It is bicameral, composed of a lower body, the House of Representatives, and an upper body, the Senate. It meets in the U.S. Capitol in Washi ...
passed legislation requiring passports for Americans traveling abroad and visas for aliens wishing to enter the United States. Shortly thereafter, the Chief Special Agent's office began investigating passport and visa fraud. Special agents also protected distinguished visitors to the United States.
During
World War I
World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
, the Chief Special Agent's office was given the responsibility for interning and exchanging diplomatic officials of enemy powers and assisting in screening people repatriated from enemy-controlled areas.
The Chief Special Agent began reporting his normal activities to the Assistant Secretary for Administration. However, he still retained his title of Special Assistant to the Secretary and reported directly to the Secretary on sensitive matters.
With the help of the
U.S. Postal Inspection Service (USPIS), security at State expanded and increased the depth of personnel investigations. The Chief Special Agent's office was used not only for security work within the State Department but also in several aspects of immigration control and in the control of crime on the high seas.
In the 1930s, it became clear that there were major passport fraud activities worldwide involving both
Communists
Communism (from Latin la, communis, lit=common, universal, label=none) is a far-left sociopolitical, philosophical, and economic ideology and current within the socialist movement whose goal is the establishment of a communist society, a ...
and
Nazis
Nazism ( ; german: Nazismus), the common name in English for National Socialism (german: Nationalsozialismus, ), is the far-right politics, far-right Totalitarianism, totalitarian political ideology and practices associated with Adolf Hit ...
. The Chief Special Agent's office, working as the investigative and identification arm of the Passport Office, successfully exposed several of these subversive operations.
Office of Security (S.Y.)
With the coming of World War II in the minds of the political leaders of America, they decided it was time to develop a separate branch of the Bureau of Diplomatic Security. This new branch would be referred to as the Office of Security, or simply the S.Y. One major addition to the Bureau of Diplomatic Society stemming from the addition of the Office of Security was the development of security staffs on a regional level. The Office of Security was also responsible for starting the use of overseas agents carrying out various tasks to protect the security of the United States.
As the threat of terrorist acts against America grew, the SY expanded its role as a part of the United States Department of State.
World War II
In many of these cases, the passport aspect was incidental to a much larger problem -
Soviet
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...
and
German
German(s) may refer to:
* Germany (of or related to)
**Germania (historical use)
* Germans, citizens of Germany, people of German ancestry, or native speakers of the German language
** For citizens of Germany, see also German nationality law
**Ger ...
espionage networks. Investigation of passport fraud in New York City led to the discovery of a Soviet intelligence network that, in turn, revealed a number of Soviet agents and American Communist Party members engaged in espionage activities. Although a back-door approach, these investigations succeeded in exposing for the first time the existence of such Soviet operations.
With the outbreak of
World War II
World War II or the Second World War, often abbreviated as WWII or