54 citations · 119 across the 24 of their papers we have counts for
4 papers · 1 filter
The Authorization Policy Existence Problem
Pierre Bergé, Jason Crampton, Gregory Gutin +1
Constraints such as separation-of-duty are widely used to specify requirements that supplement basic authorization policies. However, the existence of constraints (and authorizatio…
Cryptographic Enforcement of Information Flow Policies without Public Information via Tree Partitions
Jason Crampton, Naomi Farley, Gregory Gutin +2
We may enforce an information flow policy by encrypting a protected resource and ensuring that only users authorized by the policy are able to decrypt the resource. In most schemes…
Parameterized Resiliency Problems via Integer Linear Programming
Jason Crampton, Gregory Gutin, Martin Koutecký +1
We introduce an extension of decision problems called resiliency problems. In resiliency problems, the goal is to decide whether an instance remains positive after any (appropriate…
A Multivariate Approach for Checking Resiliency in Access Control
Jason Crampton, Gregory Gutin, Rémi Watrigant
In recent years, several combinatorial problems were introduced in the area of access control. Typically, such problems deal with an authorization policy, seen as a relation $UR \s…