Hut 7

Hut 7 was a wartime section of the Government Code and Cypher School (GC&CS) at Bletchley Park tasked with the solution of Japanese naval codes such as JN4, JN11, JN40, and JN-25.[1][2][3] The hut was headed by Hugh Foss who reported to Frank Birch, the head of Bletchley's Naval section.

Hut 7 supplied cryptanalysts and linguists to Bletchley's front line station the Far East Combined Bureau (FECB) at Hong Kong, then Singapore, then Anderson Station (Colombo, Ceylon, now Sri Lanka), then Allidina School in Kilindini, Kenya before moving back to Colombo.[citation needed]

Bletchley co-operated with the US Navy Code and Signals Section known as OP-20-G in Washington D.C., and with FRUMEL in Melbourne (although the reciprocal cooperation from Fabian at FRUMEL was limited and reluctant); see Central Bureau and FRUMEL.

  1. ^ Loewe, Michael (1993). "Chapter 26: Japanese Naval Codes". In F. H. Hinsley and Alan Stripp (ed.). Codebreakers: The Inside Story of Bletchley Park. Oxford University Press. ISBN 0-19-285304-X.
  2. ^ Denham, Hugh (1993). "Chapter 27: Bedford-Bletchley-Kilindini-Columbo". In F. H. Hinsley and Alan Stripp (ed.). Codebreakers: The Inside Story of Bletchley Park. Oxford University Press. ISBN 0-19-285304-X.
  3. ^ Scott, Norman (April 1997). "Solving Japanese Naval Ciphers 1943 – 45". Cryptologia. 21 (2): 149–157. doi:10.1080/0161-119791885878.