Combined Cipher Machine - Wikipedia
The CCM programme cost US$6 million. SIGROD was an implementation of the CCM which, at one point, was proposed as a replacement for the ECM Mark II (Savard and Pekelney, 1999).. TypeX Mark 23 was a later model of the Typex cipher machine family that was adapted for use with the Combined Cipher Machine.. Security. While Allied codebreakers had much success reading the equivalent …