Decentralized Enforcement of Artifact Lifecycles

Abstract : Artifact-centric workflows describe possible executions of a business process through constraints expressed from the point of view of the documents exchanged between principals. A sequence of manipulations is deemed valid as long as every document in the workflow follows its prescribed lifecycle at all steps of the process. So far, establishing that a given workflow complies with artifact lifecycles has mostly been done through static verification, or by assuming a centralized access to all artifacts where these constraints can be monitored and enforced. We present in this paper an alternate method of enforcing document lifecycles that requires neither static verification nor single-point access. Rather, the document itself is designed to carry fragments of its history, protected from tampering using hashing and public-key encryption. Any principal involved in the process can verify at any time that a document's history complies with a given lifecycle. Moreover, the proposed system also enforces access permissions: not all actions are visible to all principals, and one can only modify and verify what one is allowed to observe.
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Communication dans un congrès
EDOC 2016, Sep 2016, Vienne, Austria. Proceedings of the twentieth entreprise computing conference 〈http://edoc2016.univie.ac.at〉
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Sylvain Hallé, Raphaël Khoury, Antoine El-Hokayem, Ylìès Falcone. Decentralized Enforcement of Artifact Lifecycles. EDOC 2016, Sep 2016, Vienne, Austria. Proceedings of the twentieth entreprise computing conference 〈http://edoc2016.univie.ac.at〉. 〈hal-01365315〉

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