[lrvick]

What open hardware can legally do any useful (open source, auditable, and secure) encrypted voice communication at long distance via ISM?

[Johnythree]

Talk to your radio supplier, there are many encryption devices routinely used on VHF and UHF.

Of course encryption is not impossible on HF, just a bit more difficult.

Whatever, both commercial and military uses are using encryption on HF.

[lrvick]

Commercial and military use encryption with well known backdoors on HF, using bands only they are licensed to use with proprietary hardware.

https://www.wired.com/story/tetra-radio-encryption-backdoor/

This is why proprietary solutions are non-starters.

Civilians deserve real encryption they can control with provable privacy.

[rsync]

Yes, please - I would like to see examples of the hardware stack that enables this use-case.

Thanks.

[jjjjmoney]

I’m trying to dig up the M17 messages on the chipsets, but until then - WiFi is incredibly popular and operates on ISM bands. Same with LoraWan, and I have seen some proprietary 900Mhz mesh devices (I think called Milo(?)).

The M17 project found some low cost transceivers that operate on a pretty low level, and I think those would be relevant for future development on ISM for people wanting to use encryption.