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In the context of HAM radio transmissions, encryption includes voice scrambling methods that we wouldn't nowadays consider secure encryption. There used to be a lot of analogue voice scramblers and voice inversion tools. I think you can still buy them. Generally, there is a prohibition against obscuring transmissions on HAM radio. (Or at least I think so, I'm not a HAM operator myself.)

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Yep. There are some manufacturers that offer AES 256 encryption capable encryption too. I think that's still generally secure.

Why is this downvoted? Kenwood is one of the manufactures that has AES 256 radios capable of transmitting in the ham bands. NIST still considers AES 256 secure.

Not sure why it was being downvoted, but saying "AES 256" is secure is both true and meaningless. It's a low level building block of cryptosystems, and there are countless examples of AES based systems being compromised because the system built around it had flaws.

Yeah, I guess the algorithm is secure but how it's implemented may not be. I think the NSA was involved with at least some radio manufacturers implementation, so there could be a backdoor.

Random pedantry... Ham is not an acronym, so it isn't capitalized.

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