general/encryption-devices
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C-36 (cipher machine)
1930s invention by Swede Boris Hagelin
Sectéra Secure Module
Family of secure communications products
C-52 (cipher machine)
1950s cipher machines by Crypto AG
HC-9
Mechanical cipher device
CD-57
Mechanical cipher machine
Kryha
Device for encryption and decryption
Secure Terminal Equipment
Encrypted telephone system
Cipher disk
Encryption and decryption tool consisting of two metal plates with alphabets