The list of exam-
Anybody can be a
subject
Identity providers
assert identities of
the ones they know
about
Trust 119
ples from the of?¬‚ine world is endless. Governments can emit
claims about their citizens; employers can issue claims about
their employees; a department of motor vehicles can claim that
a certain individual can lawfully drive particular vehicles; an
airline can declare that a given individual is a passenger of a
certain ?¬‚ight; a doctor can declare that a speci?¬?ed patient is ?¬?t
for physical activity; a department store can award a customer
with loyalty privileges. A very important example is the one in
which an individual makes claims about himself, such as declaring
his home address on a feedback form in a restaurant.
Note that in all the previous examples the IP was actually competent
in terms of the kind of identity information mentioned. A
government is a natural IP for its citizens because it actually
owns the information involved (such as the passport number),
and it has the appropriate means for managing it (such as demographic
archives). Every entity aware of preceding facts will
consider the government an authorityin the matter of its citizens.
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