Goal

The goal of authentication in a general sense is for a user to provide some credentials to prove ownership of a user URI.

User URI

Currently the most popular ways to represent a URI are:

• http:// -- web profile
• mailto: -- email
• acct: -- webfinger

Hopefully supported will aslo be

• tel: -- telephone

Authentication Methods

• BrowserID https://browserid.org/
• Web Keys http://payswarm.com/specs/ED/web-keys/
• Oauth2 http://oauth.net/2/
• Facebook Connect http://developers.facebook.com/docs/guides/web/
• WebID http://webid.info/
• OpenID http://openid.net/
• SAML http://en.wikipedia.org/wiki/SAML_2.0
• PKI http://en.wikipedia.org/wiki/Public_key_infrastructure