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Privacy protection is required when a user's private attributes are disclosed. Expert
evaluation of this capability will be required. Observation and maintenance of a trust
relationship's evolution and update is also one of the main tasks for trust establishment,
so it should be included in the evaluation.
The performance of network switch configuration for a federated trust management system
can be measured by the average time used for the establishment process and its user
involvement. The degree of user involvement is also a good measurement of usability.
Table 3 shows a comparison of six major systems' establishment capability. The
"yes/no" answers the question of whether certain functionality is supported. I simulate
the establishment process between a hospital domain and a pharmacy domain using
IBM Trust Establishment Framework, Liberty Alliance Project, and TrustBuilder with
only one challenge and one verification. The numerical data is obtained from this onechallenge-
and-one-verification negotiation protocol.
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