A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following correspondence: the Japanese Embassy in Washington was ordered to destroy its cyphers and cypher machine on December 4.
- Collection ID
- HW1
- Conflict
- Second World War
- Document Reference
- HW1 /294/2
- Document Types
- Memorandum
- File Reference
- HW1 /294
- Identifier
- 10.1080/swwf.hw1.0294.002
- Keywords
- Diplomatic Missions Security Cyphers
- Languages
- English
- Organizations
- Government Code and Cypher School
- Pages
- 1
- Published in
- United Kingdom
- Themes
- Military Intelligence
