I haven't look at the specs deeply, but it would be nice to have a system that did not need any kind of server at all, but the browser itself could be the Perso

I haven't look at the specs deeply, but it would be nice to have a system that did not need any kind of server at all, but the browser itself could be the Persona identity provider. The actual local data needed to pull it off could be replicated (encrypted) to cloud storage so it would work across all your devices and browsers, but the actual profile data itself would never be readable by the servers. I started looking at the feasibility of building something like Persona into a 'serverless' social network a while ago using Broadcast Encryption techniques to define social sharing groups with revocation (de-friending) and Identity Based Encryption, but it seems like the state of the art IBE always requires a trusted server somewhere. But someone with more expertise in cryptography than me can maybe make it work. My original essay that prompted it (http://timepedia.blogspot.com/2008/05/decentralizing-web.html http://timepedia.blogspot.com/2008/05/decentralizing-web.htm...) based on the sad state of affairs these days where everything is non-federated.