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In this work we present a modified mixed formulation for some three-field problems. Under a special hypothesis the modified formulation is such that: the verification of two (BB) conditions is avoided and one has to deal only with one, and the new problem has exactly the same solution as the old one.
This paper present a software infrastructure for multiservice access solution based on S-OrBAC model and smartcard that allow benefiting from free or prepaid multiservice offered by big organizations. The authentication of users is made by the security features of the smartcard and the control of rights and attributes by a new variant S-OrBAC model based on… (More)
We present in this paper a multiservice access solution based on S-OrBAC model, contactless smartcard and NFC technologies that allow to benefit from free or prepaid multiservice offered by organizations like universities for example. This solution permits to realize secure micro-transactions, network access and application access. This paper propose a new… (More)