A Quality Model for Evaluating Encryption-as-a-Service

Cloud computing is a promising paradigm and seen as a trend on information and technology. However, it is a challenge to ensure the security of cloud computing. Compared with other security schemes, Encryption-as-a-Service (EaaS) not only avoids the risk of cloud, but also is more efficient. For commercial success of Encryption-as-a-Service, we present a quality model to evaluate the quality level of service. We define four quality characteristics of Encryption-as-a-Service, and propose the corresponding metrics based on practical experience and research. Moreover, we define \( LE_{EaaS} \) as a comprehensive metric for the quality level, and determine weighting coefficients utilizing CRITIC method, which will make the evaluation more practical.