Government Code and Cypher School

E78811

The Government Code and Cypher School was the British World War II codebreaking organization, based at Bletchley Park, responsible for decrypting enemy communications and laying the foundations of modern cryptography and computing.

All labels observed (3)

How this entity was disambiguated

Statements (52)

Predicate Object
instanceOf British government organization
signals intelligence agency
activeDuring World War II
alsoKnownAs Government Code and Cypher School
surface form: Government Code and Cipher School
codeName GC&CS
contributedTo Allied victory in World War II
development of modern computing
development of modern cryptography
country United Kingdom
employer Alan Turing
Bill Tutte
Dilly Knox
Gordon Welchman
Harry Hinsley
Hugh Alexander
Joan Clarke
Mavis Batey
Max Newman
Stuart Milner-Barry
Tommy Flowers
endTime 1946
field communications security
cryptanalysis
cryptography
signals intelligence
handledLanguage German
Italian
Japanese
Russian
headquarters Bletchley Park
location Bletchley Park
London, England
surface form: London
mainOpponent Fascist Italy
Japan
surface form: Imperial Japan

Nazi Germany
notableProject Ultra intelligence program
notableWork breaking German Enigma ciphers
breaking Lorenz cipher (Tunny)
operatedBy UK government
surface form: British government
partOf British intelligence
surface form: British intelligence community
predecessor Room 40
responsibleFor decrypting enemy communications
shortName GC&CS
startTime 1919
subordinateTo Foreign and Commonwealth Office
surface form: Foreign Office
successor Government Communications Headquarters
usedFacility Hut 3
Hut 4
Hut 6
Hut 8
usedTechnology Bombe machines
Colossus computers

How these facts were elicited

Referenced by (27)

Full triples — surface form annotated when it differs from this entity's canonical label.

Alan Turing employer Government Code and Cypher School
Government Communications Headquarters formedFrom Government Code and Cypher School
Government Communications Headquarters precededBy Government Code and Cypher School
BRUSA Agreement primaryParties Government Code and Cypher School
this entity surface form: British Government Code and Cypher School
BRUSA Agreement involvedOrganization Government Code and Cypher School
Government Code and Cypher School alsoKnownAs Government Code and Cypher School
this entity surface form: Government Code and Cipher School
Bletchley Park operatedBy Government Code and Cypher School
Bletchley Park operatorDuring Government Code and Cypher School
Room 40 subsequentOrganization Government Code and Cypher School
MI1 followedBy Government Code and Cypher School
Joan Clarke employer Government Code and Cypher School
Hugh Alexander employer Government Code and Cypher School
United Kingdom in World War II intelligenceService Government Code and Cypher School
GC&CS fullName Government Code and Cypher School
GC&CS alsoKnownAs Government Code and Cypher School
Dilly Knox employer Government Code and Cypher School
Dilly Knox memberOf Government Code and Cypher School
Harry Hinsley employer Government Code and Cypher School
Hut 8 operatedBy Government Code and Cypher School
Colossus computers operator Government Code and Cypher School
Block B usedBy Government Code and Cypher School
Ultra intelligence operator Government Code and Cypher School
Hut 6 operatedBy Government Code and Cypher School
Hut 3 operatedBy Government Code and Cypher School
Hut 4 partOf Government Code and Cypher School
Hut 4 operatedBy Government Code and Cypher School
Mavis Batey employer Government Code and Cypher School