Provenance Monitoring in the Cloud

The provenance of workflow is an important supportive component of workflows that concerns the knowledge sharing, product reusability, and process verification. Cloud computing brings new application opportunities and, along with them, associated research challenges, such as integrity, privacy, security, and related legal problems. In this talk, we describe an approach and a system for monitoring data/workflow provenance, with the goal of ensuring/assessing cloud security. The approach relies on (1) OPM, the Open Provenance Model for the specification of provenance, (2) Colored Petri Net (CPN) for diagnosis purposes, and (3) Web Service Security policies (WS-S) which are integrated as part of workflow tasks in order to simulate security checkpoints.