Secure Workflow Execution in Grid Environments

This paper presents a complete workflow security system for Grid Environments. It offers a high level of security, including access control for complex workflows, for various types of operations. This novel architecture also performs complex analyses for incompatible roles and policies at the workflow level. It also keeps track of previous actions and computes a security level for each enlisted user. Workflows are received in a slightly modified BPEL format, which ensures a certain degree of compatibility with a normal BPEL engine, but at the same time offers a simple description regarding the security information which must be transmitted. The novel format, derived from BPEL, represents the secure workflow model, a new standard capable of securely describing a workflow. The result of this work is a fast, modifiable and easy to integrate security system.