Vulnerability-Aware Secure Service Deployment in Cloud-Edge Continuum

Software weaknesses and vulnerabilities are continuously discovered and rapidly evolving. Their direct and indirect interference with the business process workflow execution is neither fully understood nor addressed by the current literature. The strict control of the vulnerability footprint of the landing platform before cloud/web service workflow execution is nowadays largely used as a prevention measure in order to improve execution trustworthiness. The vulnerability footprint governance is exacerbated by the cloud, where a common execution platform hosting (vulnerable) services is shared between different tenants. The paper proposes a service workflow deployment solution tailored for Edge-Cloud Continuum, made of different landing platforms showing different peculiarities. The proposed solution is capable of finding a suitable deployment recipe for a given workflow by i) evaluating the vulnerability footprint of each platform, ii) computing the set of candidate deployment platforms, iii) finding the optimal deployment solution, and iv) migrating already deployed workflows in case the vulnerability requirement is no longer satisfied. Each workflow can be associated with a set of requirements to be satisfied by our deployment solution, like the maximum level of vulnerability footprint accepted. Each workflow deployment contributes to the vulnerability footprint of the landing platform involved.