Mandatory key registration

In the event of legally required key registration, I would like to continue to use PGP. My private RSA key is my own business, so I would like to comply with the requirements by registering my IDEA keys instead. There are approximately 2**128 of them, and I'm not quite sure which one will be used next, so can I just register ALL of them? Can I do this on-line? If all the cypherpunks use the same key set, must we each register all of them, or will a single list do? Rick F. Hoselton (who doesn't claim to present opinions for others)