The story of how the Enigma machine was broken is famous across the world. What is less well known is how the Americans and the British were keeping their communications secure.



This video discusses two machines, the ECM Mark II and the TypeX, both of which were resistant to cryptanalysis during their time of operation.



Read more for yourself here:

https://maritime.org/doc/crypto/ecm/i...
http://www.jproc.ca/crypto/typex.html
https://patents.google.com/patent/US6...



The images used in this video were reproduced under the CCSA license: https://creativecommons.org/licenses/...