Looking for Elgamal sign+encrypt key information

[Len Sassaman]

On Mon, 15 Mar 2004, Atom 'Smasher' wrote:

> looks like the latest draft doesn't really encourage RSA....
>
> http://www.ietf.org/internet-drafts/draft-ietf-openpgp-rfc2440bis-09.txt
>
>     Implementations MUST implement DSA for signatures, and ElGamal for
>     encryption. Implementations SHOULD implement RSA keys.
>     Implementations MAY implement any other algorithm.
>
> so, if one were to make an RSA-only key, that key would not be strictly
> openPGP compliant? one would have to add an ElGamal subkey, for full
> compliance?
>
> in that case, what would be a good way (or ways) to force the sender to
> use the RSA encryption key, and only use the ElGamal encryption key if RSA
> isn't supported on their end?

The RFC applies to implementations, not use models.