"No-Keyserver" (and other) flags on keys

[David Shaw]

On Jun 27, 2010, at 3:58 PM, Dan Mahoney, System Admin wrote:

> All,
> 
> How difficult would it be to propose some kind of extension flag to the PGP key format that in essence says "don't publish me to a keyserver". Note that I'm asking from a technical point of view, not a social (i.e. making servers support it) or IETF one (insert bikesheds here).
> 
> My question is: Is it possible to do in such a way that keys would be backward-compatible?

Not only is it possible, it already exists.  GnuPG can even set it and unset it, as you like.

It's effectively a no-op though, as no server supports it.

David