Re: [openpgp] Context Parameters for Signing and Encryption

[Daniel Huigens <[e-mail]>]

On Wednesday, February 8th, 2023 at 23:28, Daniel Kahn Gillmor wrote:
> I think what you're saying is that a greenfield implementation can
> simply mandate that a particular context be used, and legacy/existing
> systems cannot safely adopt the context parameter.

Indeed a greenfield application / usage of OpenPGP can mandate that a
particular context be used; legacy/existing applications / usages could
also adopt the context parameter, but would indeed need additional
signalling to know whether they can do so. I'm simply saying that we
can declare that signalling out of scope for the OpenPGP spec proper,
and that we can discuss it in the context of each specific application;
and that even if we don't end up doing so, the context parameter will
still be useful for new / greenfield applications.

Best,
Daniel