Basit Shafiq, Arjmand Samuel, Elisa Bertino, and Arif Ghafoor

CERIAS TR 2005-73

techreport

In this paper, we propose a framework for secure composition and management of time based work flows. The proposed framework allows communication and sharing of information among predefined or ad hoc team of users collaborating with each other in the time critical workflow applications. A key requirement for such applications is to provide the right data to the right person at the right time. In addition, the workflow needs to be adapted if a subtask of a workflow cannot be executed within the due time. The proposed framework supports GTRBAC based workflow specification and allows dynamic adaptation of workflow instances depending on the execution status of workflow tasks and environmental context. Adaptations in a workflow may include rescheduling of component tasks, reassignment of users to the scheduled tasks, or abortion of component tasks that cannot be completed under the current system state. We propose an integer programming based approach for finding the best possible adaptation according to the pre-defined optimality criterion.

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Purdue University

Shafiq

Electrical and Computer Engineering

CERIAS

1900-01-01

Secure and adaptive workflows Optimal workflow adaptation

Management of secure and adaptive workflows