In France, thecabinet noir (French pronunciation:[kabinɛnwaʁ];French for "black room", also known as the "dark chamber" or "black chamber") was a government intelligence-gathering office, usually within apostal service, where correspondence between persons or entities was opened and read by government officials before being forwarded to its destination.[1] However, this had to be done with some sophistication, as it was considered undesirable if the subjects of the practice knew about it, and important "that the black chamber not interrupt the smooth running of the postal service."[2]
This practice had been in vogue since the establishment ofpostal andtelegraphy services, and was frequently used by the ministers ofLouis XIII andLouis XIV; but it was not until the reign ofLouis XV that a separate office for this purpose was created. This was called thecabinet du secret des postes, or more popularly thecabinet noir. Although declaimed against at the time of theFrench Revolution, it was used both by the revolutionary leaders and byNapoleon.[3][4]
Nowadays, the termcabinet noir in the press regards aides to elected officials, especially around thePresident of France, or to candidates for elected office, who are tasked with finding sensitive information on political opponents and using that information for political purposes.[5]
By the 1700s,cryptanalysis was becoming industrialized, with teams of government cryptanalysts working together to crack the most complex monoalphabeticciphers. Each European power had its own so called black chamber, a nerve centre for deciphering messages and gathering intelligence. The most celebrated, disciplined and efficient was the Geheime Kabinettskanzlei inVienna. It operated according to a strict timetable, because it was vital that its activities should not interrupt the smooth running of the postal service. Letters which were supposed to be delivered to embassies in Vienna were first routed via the black chamber, arriving at 7 am. Secretaries melted seals, and a team ofstenographers worked in parallel to make copies of the letters. Within three hours the letters had been resealed and returned to the central post office to be delivered to their intended destination. As well as supplying the emperors of Austria with vital intelligence, the Viennese black chamber sold the information it harvested to other European powers. In 1774, for example, an arrangement was made with Abbot Georgel, the secretary in the French embassy, who had access to a biweekly package on information for 1,000ducats.
A black chamber was also employed byAnthonie Heinsius,Grand pensionary of theDutch Republic, during theWar of the Spanish Succession under the direction of his private secretaryAbel Tassin d'Alonne. They used the services ofFrançois Jaupain, the director-general of the postal system in theSouthern Netherlands to intercept the diplomatic mail of France and its allies.[6]
In 1911, theEncyclopædia Britannica Eleventh Edition took the view that thecabinet noir had disappeared, but that the right to open letters in cases of emergency still appeared to be retained by the French government; and a similar right was occasionally exercised inEngland under the direction of aSecretary of State. In England, this power was frequently employed during the eighteenth century and was confirmed by the Post Office Act 1837; its most notorious use was, perhaps, the opening ofMazzini's letters in 1844.[3]
Suchpostal censorship became common duringWorld War I. Governments claimed that thetotal war which was waged required such censorship to preserve the civilian population'smorale from heart-breaking news up from the front. Whatever the justification, this meant that not a single letter sent from a soldier to his family escaped previous reading by a government official, destroying any notion ofprivacy orsecrecy of correspondence. Post censorship was retained during theinterwar period and afterwards, but without being done on such a massive scale.[7]
The USTrade Act of 2002 permits the opening of international mail to and from the United States by Customs[8] under theborder search exception to theFourth Amendment of the Constitution.[9] This practice has been criticised, including suggestions that it adds to the cost of conducting the Postal Service and can affectpostage rates.[10] The USPS apparently informed Congress of criticism before it passed the legislation.[11] The Act does prohibit reading mail incidentally included in the package or its envelope when searching for contraband.[8] TheIntelligence Authorization Act of 2004 has also been said to unconstitutionally permit the opening of domestic mail.[8]
This article incorporates text from a publication now in thepublic domain: Chisholm, Hugh, ed. (1911). "Cabinet Noir".Encyclopædia Britannica. Vol. 4 (11th ed.). Cambridge University Press. p. 920.