Search notes:

Claims based identity

Claim

A claim is a statement about a subject, made by an issuer.

Such a statement contains a piece of information about an identity. Typical cited examples include

eMail address
name
SID (?)
etc.

Subjects

Typical examples of a subject include:

users
Applications / Services
Device / Computer.

Issuer

Issuers include

Operating systems
Applications / Services
Role providers
Identity providers
Federation providers

See also

Windows Identity Foundation: a framework for building identity-aware applications.

The .NET class System.Security.Claims.Claim