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Encryption can very well be done on quite small portable devices, also during WWII. The famous German Enigma machine was about as large as a type-writer, and that was one of the most advanced and complex encryption of the time. Smaller machines with simpler encryption also existed. However, encrypted communications required a separate radio person who does ...


I think it's safe to conclude that no fighter plane radios were encrypted, due to requiring extremely bulky computers at the time. Communication between enemy fighters was theoretically possible, since all you need to do is tune in to the enemy's frequency, but most planes could only use a very limited set of preset frequencies. Of course this does mean ...

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