Having an intuitive
understanding of
cards makes it easy
to select the right
card
181
digital identities as cards makes the task of selecting the correct
identity easy for an average user.
The user??™s experience is also simpli?¬?ed in more complicated
situations where several different digital identities could satisfy a
particular request. This is a potentially confusing situation; however,
given the context of the interaction, users can select the
card they want to use. For instance, users could have a card that
they like to use when browsing the web that has a fake name
and rarely used email address and another card that they use
when shopping that has their real name and main email
address. Based on the site users are visiting, it is easy to select
the identity they want to use. By putting users in control and
empowering them to understand the identity transaction, the
?¬?rst law of identity, ???User Control and Consent??? (see Chapter 2),
is realized.
Brokering Trusted Interactions
One of the crucial aspects of physical cards that also applies to
Information Cards is the brokering of trust from the IP to the RP.
Why does the person to whom you are showing your card (the
RP) believe that the card really contains information about you
(the subject) and that they can put trust in the fact that the information
is being asserted by a trusted third party (the IP).
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