An arbitration web service for e-learning based on xml security standards

This paper promotes a non-repudiation system for student evaluation in an e-learning environment based on web services, AJAX frameworks and PEAR packages in order to implement XML security standards, to provide improved user experience, asynchronous data exchange and message authentication for on-line test papers. The motivation of this research is the need to arbitrate on-line evaluation for both parties, the e-teacher and the e-student, the evaluation criteria and the rating against open answers.