AFAIK, "Thus the current citation for it is J. Reeds, D. Ritchie, R. Morris, "The Hagelin Cipher Machine (M-209): Cryptanalysis from Ciphertext Alone", unpubli

AFAIK, "Thus the current citation for it is J. Reeds, D. Ritchie, R. Morris, "The Hagelin Cipher Machine (M-209): Cryptanalysis from Ciphertext Alone", unpublished technical memorandum, Bell Laboratories, 1978. Submitted to Cryptologia." has been published in 2015: http://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs1978.pdf http://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs197...