Your bartender
smiles and pours Chianti in your high-stem glass. That??™s
trust.
Roles in the Identity Metasystem
The Identity Metasystem abstracts the entities and processes
involved in identi?¬?cation operations.
The various actors participating in the transaction are perhaps
the ?¬?rst things that need to be modeled, the basic blocks from
which we can start to build our Metasystem. Understanding the
invariant characteristics of relationships and mutual expectations
is a key step toward successfully capturing the essence of
the process. Observing the recurrence of such features across
many different identity-related transactions leads to the de?¬?nition
of some archetypes, or roles, which successfully describe
the behavior and the properties of all the actors involved.
Substantially, if an entity participates in an identity-related
process, you can always represent such an entity in the Identity
Metasystem with one or more of those roles.
The Identity Metasystem distinguishes three possible roles: subject
(S), relying party (RP), and identity provider (IP). As the following
descriptions will clarify, those roles describe perfectly
natural behaviors, in full agreement with the intuition; in fact,
they are perfectly suitable for describing identity-related
Trust 117
processes happening in the of?¬‚ine world, too.
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