On 11/10/25 1:43 AM, Werner Koch wrote:
> Hi!

Hi Werner, and nice to meet you! I really appreciate all the work you’ve done for PGP.

> BTW, RFC-4880 compatibily would also mean to drop support for Curve25519
> (ed25519 and cv25519) because they are not covered by the ECC extension
> to OpenPGP (RFC-6637).  I doubt that anyone wants that.
>
> OCB mode is meanwhile widely used and RNP (the Thunderbird *PGP library)
> also supports it (actually cross-tested with GnuPG back in 2018).  The
> TB maintainer just refuses to enable this feature in RNP.

True, and perhaps I didn’t say what I meant.

At least on macOS, using any flags, such as --rfc4880, --openpgp, and --rfc4880bis, when editing the key and setting prefs do not change the key feature flags whatsoever. They only change when set manually. I don’t mean to change the algorithm of the key, of course.

And I understand what’s *possible* in RNP/TB, but I’d hope to be able to set the feature flags of my key to be TB-compatible.

Best,
Jack

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