A blockchain-based trustworthy certification process for composite services

Lack of trustworthiness is a major limit of microservice-based systems, where service composition is mainly driven by functional requirements. In this paper, we propose an approach where composite service certification meets blockchain, to support continuous and trustworthy verification of non-functional requirements. A certification process for composite services is then introduced at the basis of an audit process aiming to support certificates with stable properties. Trustworthiness is built on the blockchain, used as a platform for coordinating collaboration among involved parties such as service orchestrators, certification authorities, and auditors.