The CH3A online one tape cryptoequipment

Technical data

Manufactured by Olivetti for the French army, the CH-3-A cryptographic machine appears to operate online using a one-time pad tape.
It was designed to be placed between a teletypewriter and the connection equipment.
No more information is available for this machine, which dates from the 1950s.

Pictures

CH3A - Front
CH3A - Back
CH3A - Opened
CH3A - Inside

First revision: 2025/12/07
Last revision: 2025/12/07