0646

File Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/646
Date 14 June 1942
Government Department Government Code and Cypher School
File Accession Date 1993

Description

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 report: a report of an investigation with U.S. cryptographers on the possibility that the Germans are reading U.S. ciphers; see also 9743, 9744, 9779, 9782, 9871.

Document Title Date
i Front Cover 14 June 1942 Download PDF (252 KB)
1st Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence 14 June 1942 Download PDF (255 KB)
Cookies Notification

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Find out more.

Accept