Virtual organizations (VO) temporarily aggregate resources of different domains to achieve a
common goal. Web services are being positioned as the technological framework for …

In this paper we identify specific security requirements for distributed workflows and provide
a decentralized workflow execution mechanism that ensures their satisfaction. With our …

This chapter shows how flexibility can be realized for distributed workflows. The capability to
dynamically adapt workflow instances during runtime (eg, to add, delete or move activities) …

As opposed to centralized workflow management systems, the distributed execution of
workflows can not rely on a trusted centralized point of coordination. As a result, basic …

The execution of business processes in the decentralized setting raises security
requirements due to the lack of a dedicated infrastructure in charge of management and …

Efficient and well structured business processes (and their corresponding workflows) are
drivers for the success of modern enterprises. Today, we experience the growing trends to …

In decentralized workflows no single point of control exists, instead, the workflow
specification itself travels from service to service. Every service must thus be able to …

Modern enterprise organisations rely on dynamic processes. Generally these processes
cannot be modelled once and executed repeatedly without change. Enterprise processes …

Untitled Page 1 Page 2 Department of Computer Science Research Group IT-Security Prof. Dr.
Claudia Eckert Technische Universität Darmstadt Diploma Thesis Control Flow Enforcement in …

In this paper we identify specific security requirements for distributed workflows and provide
a decentralized workflow execution mechanism that ensures their satisfaction. With our …