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Telex encryptor
- this page is a stub
GC-521, or Gretacoder 521, was a custom-made
encryption/decryption device
for teleprinter signals
(telex),
developed around 1980 by Gretag in
Regensdorf (Switzerland) as an add-on for the Hasler SP-300 teleprinter.
The complete teleprinter with crypto was known as SP-300 GCA.
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© Crypto Museum. Created: Tuesday 18 June 2019. Last changed: Tuesday, 18 June 2019 - 16:58 CET.
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