A dynamic web service-based trust and reputation scheme for scientific workflows

Scientific workflows and Web Services have been utilized as a means to promote cooperation among researchers in the area of e-Science. These designs execute over distributed scientific nodes and resources so as to facilitate large scale and complex scientific experiments. These distributed environments using collaborative paradigms based on Web Services and workflow technologies, have specific security requirements. Current research has focused on security requirements of a distributed scientific laboratory (e-lab), such as data confidentiality and integrity, controlled access to resources, and auditing. However, no work exists that investigates trust and reputation of the scientific nodes cooperating in the laboratory. We propose a trust and reputation scheme that operates over such a distributed e-lab environment. The trust and reputation scheme enables the process owner to assess the behavior of nodes by aggregating the number of successful activity executions and detecting malicious or unreliable behavior.