Just had a thought. What if Domino has a feature where anyone (with registration) can deposit their public keys into a repository, that, if anyone wants to communicate securely, just do a quick look and grab the public key here, and bam, it's done.
It's like cross-certification between two parties, except this should be done at a global scale.
Thinking of the applications, I can now encrypt emails, and visit partner's secure intranet portal, without relying on public certificates (GoDaddy, LetsEncrypt, etc.)
Thank you for your consideration.