Matters

NetMesh: Light-Weight Digital Identity (LID)
"What is LID? A quite simple, but powerful technology that empowers individuals to keep control over and manage their digital identities.

LID is a mechanism for single sign-on (SSO).
LID makes vCards always up-to-date with better privacy
LID is a password management tool.
LID is a foundation for social networking.
NEW LID enables authenticated messaging and blog comments.
And there are many other uses."