XACML Extension for Graphs: Flexible Authorization Policy Specification and Datastore-Independent Enforcement

Aya Mohamed, Aya Mohamed, Dagmar Auer, Dagmar Auer, Daniel Hofer, Daniel Hofer, Josef Küng, Josef Küng

2023

Abstract

The increasing use of graph-structured data for business- and privacy-critical applications requires sophisticated, flexible and fine-grained authorization and access control. Currently, role-based access control is supported in graph databases, where access to objects is restricted via roles. This does not take special properties of graphs into account, such as vertices and edges along the path between a given subject and resource. In our previous research iterations, we started to design an authorization policy language and access control model, which considers the specification of graph paths and enforces them in the multi-model database ArangoDB. Since this approach is promising to consider graph characteristics in data protection, we improve the language in this work to provide flexible path definitions and specifying edges as protected resources. Furthermore, we introduce a method for a datastore-independent policy enforcement. Besides discussing the latest work in our XACML4G model, which is an extension to the Extensible Access Control Markup Language (XACML), we demonstrate our prototypical implementation with a real case giving an outlook on performance.

Paper Citation

in Harvard Style

Mohamed A., Auer D., Hofer D. and Küng J. (2023). XACML Extension for Graphs: Flexible Authorization Policy Specification and Datastore-Independent Enforcement. In Proceedings of the 20th International Conference on Security and Cryptography - Volume 1: SECRYPT; ISBN 978-989-758-666-8, SciTePress, pages 442-449. DOI: 10.5220/0012090000003555

in Bibtex Style

@conference{secrypt23,
author={Aya Mohamed and Dagmar Auer and Daniel Hofer and Josef Küng},
title={XACML Extension for Graphs: Flexible Authorization Policy Specification and Datastore-Independent Enforcement},
booktitle={Proceedings of the 20th International Conference on Security and Cryptography - Volume 1: SECRYPT},
year={2023},
pages={442-449},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0012090000003555},
isbn={978-989-758-666-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 20th International Conference on Security and Cryptography - Volume 1: SECRYPT
TI - XACML Extension for Graphs: Flexible Authorization Policy Specification and Datastore-Independent Enforcement
SN - 978-989-758-666-8
AU - Mohamed A.
AU - Auer D.
AU - Hofer D.
AU - Küng J.
PY - 2023
SP - 442
EP - 449
DO - 10.5220/0012090000003555
PB - SciTePress