Update 2025

Last year I did a lot of research on the Typex and M-209 cipher machines. While researching the Typex I also found interesting information on the lesser-known Combined Cipher Machine. This device was widely used by the US and British armed forces in WWII and in the 1950’s yet there are only a few references in books and these do not include details on its operation and message procedures. For this reason, I decided to write the detailed essay ‘The Combined Cipher Machine 1942-1962’. I’ve also uploaded the files ‘CCM 1943-45’ (from the US National Archives) and a Typex and CCM distribution list from 1945 (from the British National Archives).