Privacy is a very complex and subjective concept
with different meaning to different people. The meaning depends on the context. Moreover, privacy is close to the user
information and thus, present in any ubiquitous computing scenario. In the context of identity management (IdM), privacy
is gaining more importance since IdM systems deal with
services that requires sharing attributes belonging to users’
identity with different entities across domains. Consequently,
privacy is a fundamental aspect to be addressed by IdM to
protect the exchange of user attributes between services and
identity providers across different networks and security
domains in pervasive computing. However, problems such as
the effective revocation consent, have not been fully addressed.
Furthermore, privacy depends heavily on users and
applications requiring some degree of flexibility. This paper
analyzes the main current identity models, as well as the
privacy support presented by the identity management
frameworks. After the main limitations are identified, we propose a delegation protocol for the SAML standard in order
to enhance the revocation consent within healthcare scenarios.Proyecto CCG10-UC3M/TIC-4992 de la Comunidad Autónoma de Madrid y la Universidad Carlos III de Madri
