@wb2ifs @PrideRadioGroup Oh, I've been thinking about a next-gen APRS protocol for a few years now.
What do you mean non-repudiation in this context? As in the higher-level protocol in the digital mode supports actual cryptographic authentication, or something else?
Maybe there's a better word, but I think "non-repudiation" fits, I just wasn't sure exactly what context it fits.
Non-repudiation has a fairly specific meaning in cryptography, but I don't want to imply it can't have any meaning outside cryptography.
Yeah I totally think ham-oriented digital modes should automatically ID on every packet, whether or not it's spoofable.
Cryptographic signatures simply tie the origin of a message to the origin of a key. If you were to add cryptographic authentication to a ham radio protocol, you need to be able to answer questions about how the public keys are managed, authenticated, and distributed.
I started writing down my very preliminary thoughts about the issues that a next-gen APRS protocol should address. It rambles a bit, but it is here if you are curious: