We have the laws, which warn us that the only constants on the
Internet are diversity and change.
The ???Microsoft Vision for an Identity Metasystem??? white paper,
the manifesto of the Identity Metasystem, coalesces the preceding
consideration into a need for ?¬?ve key components, as follows:
A way to represent identities using claims
A means for IPs, RPs, and subjects to negotiate
An encapsulating protocol to obtain claims and requirements
A means to bridge technology and organizational boundaries
using claims transformation
A consistent user experience across multiple contexts,
technologies, and operators
The list of components could be rearranged in different ways,
but we chose to maintain the original criteria for the sake of
coherence with the rest of the literature on the S. The following
sections explain the components one by one, tying the de?¬?nitions
to the concepts introduced so far.
124 Hints Toward a Solution
Claim-Based Identities
At this point in the text, the reader is familiar with the concept of
digital identity. In Chapter 1, we observed the shift from blind
credentials to authentication in the section ???Ascent???; in the section
???HTTPS, Authentication, and Digital Identity,??? we gained an
intuitive understanding of the concept of digital identity, where
the frequent-?¬‚yer example showed a ?¬?rst instance of claims
usage; in the section ???The Babel,??? we observed how some technologies
incorporate the idea of claim.
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