@article{eprints3690,
           pages = {73--84},
       publisher = {Open Publishing Association},
          volume = {203},
            note = {Proceedings Eighth International Workshop on Programming Language Approaches to Concurrency- and Communication-cEntric Software, PLACES 2015, London, UK, 18th April 2015.},
           title = {A Typed Model for Dynamic Authorizations},
          author = {Silvia Ghilezan and Svetlana Jak{\v s}i{\'c} and Jovanka Pantovi{\'c} and Jorge A. P{\'e}rez and Hugo Torres Vieira},
            year = {2015},
         journal = {Electronic Proceedings in Theoretical Computer Science},
        abstract = {Security requirements in distributed software systems are inherently dynamic. In the case of authorization policies, resources are meant to be accessed only by authorized parties, but the authorization to access a resource may be dynamically granted/yielded. We describe ongoing work on a model for specifying communication and dynamic authorization handling. We build upon the pi-calculus so as to enrich communication-based systems with authorization specification and delegation; here authorizations regard channel usage and delegation refers to the act of yielding an authorization to another party. Our model includes: (i) a novel scoping construct for authorization, which allows to specify authorization boundaries, and (ii) communication primitives for authorizations, which allow to pass around authorizations to act on a given channel. An authorization error may consist in, e.g., performing an action along a name which is not under an appropriate authorization scope. We introduce a typing discipline that ensures that processes never reduce to authorization errors, even when authorizations are dynamically delegated.},
             url = {http://eprints.imtlucca.it/3690/}
}