19th century

Within days of Belgian independence, an "Administration for Public Safety" (Administration de la Sûreté Publique) was installed to protect the fledgling state against attempts by the Dutch king William I to suppress the Belgian rebels. The Public Safety would have two directorates, one being the alien police and the other the security service. As a security service, Public Safety had to protect the Belgian state against Dutch spies and republicans. Intelligence gathering happened only internally: spying abroad was considered a potential breach of the country's neutrality which was imposed by the other European states as a condition for Belgian independence. The service did initiate contacts with foreign intelligence services almost from the outset, building up tight relationships with other European secret services. After peace with the Netherlands, the service focused on subversive elements, successfully thwarting an attempted republican coup d'état instigated by Karl Marx in 1848. Other successes include the formation of an impromptu foreign intelligence service during the Franco-Prussian War of 1870 to support the Belgian Army, which was standing guard for a potential invasion of Belgium.

From the late 1870s and especially during the 1880s, the Public Safety's main concern was the rise of socialist movements. Its freedom from political control - due to the lack of a legal framework and politicians who preferred to keep their secret service at arms' length - led the service to actively engage in provocation operations. In 1886, this led to a scandal when a paid informer was caught planning a bombing attack: the Pourbaix Affair, as it was called, led to a slashing of the Public Safety's budget. Before long, funds had to be increased again however, as a wave of terrorist attacks by Russian anarchists struck Europe. During this time the Belgian intelligence service entered into a very close relationship with the Paris office of the Russian Okhrana.

20th century

On the outbreak of the First World War, the Administration for Public Safety destroyed its archives to prevent them from falling into enemy hands. Nothing is known of its history during the war. At the front, a military intelligence service was founded in 1915 that conducted all intelligence work and coordinated the activity of the resistance. Soon after the end of the war, the rivalry between the Public Safety and its military counterpart, known today as the General Information and Security Service (ADIV/SGRS), would arise as both services' activities overlapped sometimes. The military intelligence service had been given the counterespionage mission, but after it was suspended in 1923 because of a scandal involving the Belgian occupation of the Rhineland, the Public Safety had to take over again. In 1929, an administrative reform made the alien police an independent department and the Public Safety was given the name it still has today: Security of the State (Veiligheid van de Staat/Sûrete de l'Etat).

In the 1930s, State Security was occupied dealing by left- and right-wing extremis, and a surge in German espionage activity. The German threat caused the Belgian government to reinstate the military intelligence service in 1937. As war became imminent, the two services were briefly brought together under the same ministry. After the German invasion, Belgian intelligence followed the government in exile to London to undertake the coordination of the resistance once again. This was impeded by the rift between the government and King Leopold III, who had decided to stay in Belgium and thus fall into the hands of the Nazis. The government, unwilling to trust the military intelligence service because of their loyalty to their commander-in-chief made prisoner of war, favoured the State Security. This greatly exacerbated the rivalry between the two services, whose mutual animosity forced the government to appoint a High Commissioner to coordinate their actions.

In 1944, State Security returned to Belgium with MI6 and the Dutch secret service, which was allowed to install itself in Brussels while waiting for the liberation of the Netherlands. The service would play a substantial part in the tracking and punishing of those who had collaborated with the Germans. Afterwards a severe political crisis ensued, as many Belgians opposed the return from captivity of the discredited Leopold III. The State Security had to monitor the opposing forces, especially the nascent communist movement. The onset of the Cold War shifted the focus almost entirely on communism. The threat of Soviet espionage would take priority when Belgium became the host nation of NATO headquarters. With British and American help, Belgian intelligence was significantly expanded to meet the surge of Warsaw Pact spies. As counterespionage required the expenditure of dedication manpower and resources, from the 1970s onward, the spectre of international terrorism would come to haunt Europe again. As a convenient transit country, Belgium would often feature in terrorist activity, giving the State Security a key role in many successful counterterrorism operations. Despite this, starting in 1982, Belgium would fall victim to a surge of violence. The attacks by the communist terror group Cellulles Combattantes Communistes (CCC) coincided with a number of incidents committed by a band of gangsters (eventually acquiring the name of "Les tueurs du Brabant" or "Bende van Nijvel") which gradually intensified in the level of violence used. Whereas the CCC was effectively neutralized within a year, the Brabant killers would continue their bloody activities before disappearing in November 1985 after their most violent raid on a supermarket that claimed 28 fatalities. The case, as well as the identities of the perpetrators, remain unsolved.

In attempts to investigate the traumatic events, the State Security's activities came under scrutiny. Revelations about the ties between certain intelligence officers and right-wing organisations coincided with hints that the Brabant killers were actually linked to the NATO-led Stay Behind operation, known in Italy as Gladio, and which were coordinated in the participating nations by their secret services. The ensuing parliamentary inquiries found that the Belgian security apparatus was flawed in that it was fragmented and unsupervised. The main recommendation therefore was to provide a legal framework for the intelligence and security services to operate in, and to place them under parliamentary oversight. The State Security entered the post-Cold War era clouded by uncertainty about its future. Despite a widespread demoralisation among the staff because of this, the service continued to successfully counteract the remaining KGB operations in Belgium. Throughout most of the 1990s, the service attempted to reorganise and revitalize itself.^[1]

21st century

When in 1998 the Intelligence Services Act came in effect, the State Security finally had a legal framework that determined its remit and competences to fulfill its missions.^[9] The sensitivity of intelligence work, after the scandals of the 1980s, had led the lawmakers to postpone the authorisation to use intrusive technical means to collect intelligence. Instead, the Belgian intelligence services were only authorised to work with human sources (HUMINT). Technical collection of intelligence was not allowed, significantly putting the Belgian intelligence services behind their foreign counterparts in terms of collection and effectiveness. This was changed only in 2010 through the introduction of the Special Intelligence Methods Act (Bijzondere Inlichtingenmethoden, 'BIM' see below). Until then, the Belgian police had superior capabilities, having been allowed to use wiretapping and technical surveillance methods in 2003 (it had been the intention to provide the intelligence services with similar competences, but this work was left unfinished until 2009). Naturally, this caused a good deal of discontent with the State Security, which had to cede its place as the international preferred Belgian partner for counterterrorism.^[10]

Another cause for frustration was the installation of a threat intelligence fusion centre in 2006, a consequence of a European agreement to establish such centres as a reaction to the terrorist attacks on Madrid and London in 2004–2005. Fearing competition and even potential obsolescence, State Security chief Koenraad Dassen actively attempted to harm the establishment of the Coordination Unit for Threat Analysis (CUTA).^[11] Dassen did however try to lift the State Security's veil of secrecy, by publishing for the first time a public activity report in 2005, the same year the State Security celebrated its 175th anniversary with a conference ana book on its history and activities.^[12] However, the service was embarrassed by the escape of a Kurdish terrorist, as VSSE officers had been put to the task of guarding her while under house arrest. Dassen resigned, stating that guarding suspects was not a task fit for intelligence, but a job for the police.

In these years Belgian intelligence was adjusting to being subject to the oversight of the parliamentary review committee Committee I. Reorganisation and modernisation of the service was happening slowly and a first performance audit by the Committee I found a number of flaws. The root of the problem was however a chronic underfunding and political disinterest in the security services.^[13] Substantial reorganisation was needed when the service was finally allowed to conduct technical surveillance operations, requiring not only the equipment to do so, but also the right mindset to meet the demands for proper justification of the use of the methods granted by the 2010 BIM-law.^[14]

In the 2010s, the VSSE found espionage to be on the rise as never before, a result of the valuable and sensitive information present in Brussels, seat of various EU institutions. The CUTA and VSSE were the first security services to warn about the threat of foreign fighters returning to their country in the early days of the Syrian conflict. As the number of foreign fighters, grew the service quickly became overwhelmed, and requests for additional financial support were not met by the government even after the VSSE provided the information that foiled a terrorist cell in the border town of Verviers planning an attack shortly after the Charlie Hebdo massacre. The 13-14 November 2015 attack on Paris revealed Belgium to be the centre of terrorist activity, a connection given bloody confirmation on 22 March 2016, with the bombing of the Belgian national airport and a metro carriage in the European quarter.^[15] The circumstances that led to the failure to prevent the attacks were investigated by a parliamentary commission that recommended a substantial increase in the security services' manpower and budgets and a better integration of the different actors, as well as improvements of information management and sharing. Since 2016, the VSSE has increased its counterterrorism capabilities, helped by long-awaited financial injections. Cooperation with the other security services is also occurring at previously unseen levels of intensity. To further support public understanding of the work of the intelligence service, the VSSE celebrated the 20th anniversary of its legal framework by launching its website and publishing, for the first time in seven years, an activity report.^[16]

In 2022, the VSSE tipped the FBI about an Iraqi terrorist. A murder plot targeting former American president George W. Bush was thus foiled.^[17]