A measurement model for secure and usable e-commerce websites

This paper presents a new method to assess usability, security, and e-commerce requirements of websites. Previous research works propose a list of primary requirements for human-computer interaction, security, and e-commerce in an independent way, but they do not integrate these three aspects into a single evaluation method. We present an overview of these basic requirements, which are subsequently incorporated into a set of metrics. The proposed measurement model is based on the Goal Question Metric technique and complemented with a set of mathematical formulae. We show the effectiveness of the metrics by using an illustrative example as a proof-of-concept together with a preliminary usability study.