Government Code and Cypher School

E78811

British government organization signals intelligence agency

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.

Aliases (2)

British Government Code and Cypher School ×1
Government Code and Cipher School ×1

Statements (52)

Predicate	Object
instanceOf	British government organization → signals intelligence agency →
activeDuring	World War II →
alsoKnownAs	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 →
mainOpponent	Fascist Italy → Imperial Japan → Nazi Germany →
notableProject	Ultra intelligence program →
notableWork	breaking German Enigma ciphers → breaking Lorenz cipher (Tunny) →
operatedBy	British government →
partOf	British intelligence community →
predecessor	Room 40 →
responsibleFor	decrypting enemy communications →
shortName	GC&CS →
startTime	1919 →
subordinateTo	Foreign Office →
successor	Government Communications Headquarters →
usedFacility	Hut 3 → Hut 4 → Hut 6 → Hut 8 →
usedTechnology	Bombe machines → Colossus computers →

Referenced by (8)

Subject (surface form when different)	Predicate
Government Code and Cypher School ("Government Code and Cipher School") →	alsoKnownAs
Alan Turing →	employer
Government Communications Headquarters →	formedFrom
BRUSA Agreement →	involvedOrganization
Bletchley Park →	operatedBy
Bletchley Park →	operatorDuring
Government Communications Headquarters →	precededBy
BRUSA Agreement ("British Government Code and Cypher School") →	primaryParties