Werner Liebknecht was an engineer and Beamter who was Director of Engineering at Referat Wa Prf 7 of the Waffenamt during World War II in Wire Communication Techniques from January 1937 until April 1945 and he conducted engineering design on teletype encoding of the SZ40 and SZ42 for the Germany Army.
Werner Liebknecht (born 1 June 1905 in Waltershausen) was a German engineer and Beamter who was Director of Engineering at Referat Wa Pruf 7 of the Waffenamt during World War II and who was responsible for the design and development of many of the cryptographic devices used by German Armed Forces during World War II, including the cipher teleprinter attachment, the SZ 40 and the Siemens and Halske T52 secure teleprinter. From January 1937 to 9 April 1945 Liebknecht worked at the Waffenamt, Group WA Pruf 7 Section II in Wire Communication Techniques. His work on speech encipherment involved working on technical questions of speech (Ciphony) and on Wireless telegraphy and on telegraphy in general, Liebknecht conducted engineering design on teletype encoding of the SZ40 and SZ42 for the Germany Army. 
