Ciphering equipment used by the Swiss Army

The Zurich based company Dr. E. Gretener AG who had already developed the teleprinter ETK and the Telecrypto 53 ciphering machine, a ciphering based on similar technology but able to encrypt messages in Baudot Code CCITT No. 2 has been developed in the early sixties: their Telecrypto 61 could be used in conncetion with standard Siemens teletype machines.


Ciphering machine

The Telecryptogerät TC-61 consists of a base unit with all control elements to synchronize and control a standard Baudot code teleprinter

and a set-top ciphering unit which does the encrypting / decoding and with a mechanical key generator SPG to provide true random message keys.

Usually, the Telecrypto 61 has been used together with the teleprinter Siemens Stg-100 or the paper tape teleprinter Siemens Stg-68 in wire - bound use.

weitere Lektüre:
d: Fernschreiber und Zusatzgeräte, Regl 58.104 d