We study logical properties that concern the preservation of futuredirected obligations that have not been fulfilled yet. Our starting point is a product of temporal and deontic ...
Liveness temporal properties state that something “good” eventually happens, e.g., every request is eventually granted. In Linear Temporal Logic (LTL), there is no a priori bo...
In this paper we propose a new voting protocol with desirable security properties. The voting stage of the protocol can be performed by humans without computers; it provides every...
Abstract. Security policies, in particular access control, are fundamental elements of computer security. We address the problem of authoring and analyzing policies in a modular wa...
—When model-checking reports that a property holds on a model, vacuity detection increases user confidence in this result by checking that the property is satisfied in the inte...