Assembly: System.Web.Security.SingleSignOn (in system.web.security.singlesignon.dll)
A claim set defines the claim language that can be used within a corporation or between two agreeing corporations. When used between two corporations it is the incarnation of a business level agreement to exchange the defined authorization data.
Each external entity that communicates with the Federation Server has an associated claim set. This includes Account Partners, Resource Partners, Account Stores, and Applications. The claim set defines the language that will be used by the Federation Server to communicate with that entity.
The Common Name claim type indicates an arbitrary string used for personalization. Examples include "Ryan D Johnson" or "Microsoft Employee". Only one claim may have the Common Name type. It is important to note that there is no way to guarantee the uniqueness of the Common Name claim and therefore applications need to be very careful when using this claim type in authorization decisions.