<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "On Secure Implementation of an IHE XUA-Based Protocol for Authenticating Healthcare Professionals"^^ . "The importance of the Electronic Health Record (EHR) has been addressed in recent years by governments and institutions.Many large scale projects have been funded with the aim to allow healthcare professionals to consult patients data. Properties such as confidentiality, authentication and authorization are the key for the success for these projects. The Integrating the Healthcare Enterprise (IHE) initiative promotes the coordinated use of established standards for authenticated and secure EHR exchanges among clinics and hospitals. In particular, the IHE integration profile named XUA permits to attest user identities by relying on SAML assertions, i.e. XML documents containing authentication statements. In this paper, we provide a formal model for the secure issuance of such an assertion. We first specify the scenario using the process calculus COWS and then analyse it using the model checker CMC. Our analysis reveals a potential flaw in the XUA profile when using a SAML assertion in an unprotected network. We then suggest a solution for this flaw, and model check and implement this solution to show that it is secure and feasible. "^^ . "2009" . . "5905" . . "Springer"^^ . . "Springer"^^ . . . . . . . . . . . . . . . . . . . . "Atul"^^ . "Prakash"^^ . "Atul Prakash"^^ . . "Rosario"^^ . "Pugliese"^^ . "Rosario Pugliese"^^ . . "Francesco"^^ . "Tiezzi"^^ . "Francesco Tiezzi"^^ . . "Indranil"^^ . "Gupta"^^ . "Indranil Gupta"^^ . . "Massimiliano"^^ . "Masi"^^ . "Massimiliano Masi"^^ . . . . . . "On Secure Implementation of an IHE XUA-Based Protocol for Authenticating Healthcare Professionals (PDF)"^^ . . . . . . . . . . . "cows_iciss_2009a.pdf"^^ . . . "On Secure Implementation of an IHE XUA-Based Protocol for Authenticating Healthcare Professionals (Image (JPEG))"^^ . . . . . . "preview.jpg"^^ . . . "On Secure Implementation of an IHE XUA-Based Protocol for Authenticating Healthcare Professionals (Indexer Terms)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #406 \n\nOn Secure Implementation of an IHE XUA-Based Protocol for Authenticating Healthcare Professionals\n\n" . "text/html" . . . "QA75 Electronic computers. Computer science"@en . .