38 citations · 173 across the 47 of their papers we have counts for
5 papers · 1 filter
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…
Optimal Constructions for Chain-based Cryptographic Enforcement of Information Flow Policies
Jason Crampton, Naomi Farley, Gregory Gutin +1
The simple security property in an information flow policy can be enforced by encrypting data objects and distributing an appropriate secret to each user. A user derives a suitable…
On the Workflow Satisfiability Problem with Class-Independent Constraints
Jason Crampton, Andrei Gagarin, Gregory Gutin +2
A workflow specification defines sets of steps and users. An authorization policy determines for each user a subset of steps the user is allowed to perform. Other security requirem…
Cryptographic Enforcement of Information Flow Policies without Public Information
Jason Crampton, Naomi Farley, Gregory Gutin +2
Cryptographic access control has been studied for over 30 years and is now a mature research topic. When symmetric cryptographic primitives are used, each protected resource is enc…
Fixed-Parameter Tractability of Workflow Satisfiability in the Presence of Seniority Constraints
J. Crampton, R. Crowston, G. Gutin +2
The workflow satisfiability problem is concerned with determining whether it is possible to find an allocation of authorized users to the steps in a workflow in such a way that all…