Silvia Ghilezan (University of Novi Sad, Serbia) |
Svetlana Jakšić (University of Novi Sad, Serbia) |
Jovanka Pantović (University of Novi Sad, Serbia) |
Jorge A. Pérez (University of Groningen, The Netherlands) |
Hugo Torres Vieira (IMT Institute for Advanced Studies Lucca, Italy) |
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. |
ArXived at: https://dx.doi.org/10.4204/EPTCS.203.6 | bibtex | |
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