[openpgp] Re: Persistent Symmetric Keys: new algorithms or new packets?

Hi Justus,

Thanks for the comments!

On Wednesday, July 23rd, 2025 at 15:15, Justus Winter wrote:
> I think wouldn't mind the new kind of key packet also using PKESK
> packets and signature packets.

How do you envision this part concretely? Those packets have a public
key algorithm field, so we would presumably still need to register at
least one algorithm ID for this scenario, then?

Or we could set it to 0, which is reserved?

Either way I don't think it 100% achieves what Andrew said namely
> It also makes the registries semantically cleaner - we’re not creating
> fake “asymmetric” algorithm codepoints that replicate existing
> codepoints in the symmetric registry...

At the very least we need one codepoint in the asymmetric algorithms
registry which means "actually it's symmetric instead", which is kind of
the same thing as what the current proposal does..

Best,
Daniel

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