1989/04/01 by Wolfgang W. Mache · 1 citation
Computer Science · Social Sciences · Engineering · #History of Computing Technologies #Intelligence, Security, War Strategy #Siemens #Telegraphy #Telecommunications #Cipher #Telephony #Computer science #Electrical engineering #Engineering #Computer security #Encryption
paper · doi:10.1080/0161-118991863817
openalex publication_date 1989/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
This paper spans a period from early pioneers in electrical telegraphy and telephony to the roots of the Geheimschreiber: the (electric) Siemens Schnelltelegraphy and the development of the first electrical teletypewriter “T25” by Wernerwerk 1, Berlin, in 1928. The paper expresses the opinion that the Geheimschreiber: T52d/e was not cracked by Bletchley Park's deciphering machines during WWII.