This page is currently meant primarily for demo purposes. In particular, you shouldn’t assume that it’ll combine keys created on previous versions of the page—the message encoding and key formatting schemes are still under active development.
If you want to use this right now, the best thing to do is to check out a known revision of the repository and build it yourself. The second best thing to do is to make an offline copy of this page (“Save As…” → “Web Page, Complete” or similar) and distribute that along with your keys.
A more permanent implementation is “coming soon”.
This is a pure JavaScript implementation of Shamir’s Secret Sharing. There is no server needed; all crypto is done in your browser. See the github project page for more information.
Written by mrdomino.