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A Chinese wall security model for decentralized workflow systems
This paper proposes an approach to realize decentralized workflow execution, in which the workflow is divided into partitions called self-describing workflows, and handled by a light weight workflow management component, located at each organizational agent.
XACML Policy Integration Algorithms
The article presents the implementation of a system that makes use of the policy integration algorithms to securely replicate information in a P2P-like environment and presents the solution, the data replication process, which considers the policies specified by both the owners of the data shared and the peers sharing data storage.
A decentralized execution model for inter-organizational workflows
- V. Atluri, Soon Ae Chun, R. Mukkamala, P. Mazzoleni
- Computer ScienceDistributed and Parallel Databases
- 1 August 2007
A decentralized workflow model is presented, where inter-task dependencies are enforced without requiring to have a centralized WFMS, and performance results indicate that decentralized workflow management indeed enjoys significant gain in performance over its centralized counterpart in cases where there is less parallelism.
A Uniform Indexing Scheme for Geo-spatial Data and Authorizations
An indexing structure, called RMX-quadtree, is proposed that is capable of indexing multi-resolution satellite imagery and additionally allow representing authorizations on top of it, and it is demonstrated how authorizations with privilege modes such as view and zoom-in can be implemented using the RMx- quadtree.
Towards a Fine-Grained Access Control Model and Mechanisms for Semantic Databases
- S. Franzoni, P. Mazzoleni, S. Valtolina
- Computer ScienceIEEE International Conference on Web Services…
- 9 July 2007
This paper presents a fine-grained access control model specifically tailored to semantic models that can be enforced at the level of both the model's concepts and the concepts' instances by means of a query rewriting strategy.
Service communities: applications and middleware
This paper discusses applications of service communities and introduces the concept of Service Clubs as a structuring mechanism for communities, specifically designed to support community-based, per-project interaction and composition of services.
XACML policy integration algorithms: not to be confused with XACML policy combination algorithms!
An XACML extension, the policy integration algorithm, is proposed to address limitations of the OASIS standard language, which does not address the requirements of virtual enterprises built through collaboration of several autonomous subjects sharing their resources.
P-Hera: scalable fine-grained access control for P2P infrastructures
- B. Crispo, S. Sivasubramanian, P. Mazzoleni, E. Bertino
- Computer Science11th International Conference on Parallel and…
- 20 July 2005
P-Hera, a peer-to-peer (P2P) infrastructure for scalable and secure content hosting, allows the users and content owners to dynamically establish trust using fine-grained access control and proposes a novel means of organizing these policies that can result in faster evaluation.
Process Discovery Using Prior Knowledge
A process discovery algorithm that leverages prior knowledge and process execution data to learn a control-flow model and incorporates prior knowledge using ideas from Bayesian statistics is described.
Supporting Delegation in Secure Workflow Management Systems
The notion of delegation consistency is introduced and algorithms to assign tasks to users such that they guarantee delegation consistency are proposed such that no constraints are violated.