On access control of Cloud service chains

Service-oriented architecture may be regarded as an incubator for small resources entrepreneurs to bid and work on bigger projects. It also helps large enterprise to trade their resources at various levels. This has opened new gateways for renting out resources. Sometimes a single service is sold at different levels making the Cloud service a supply chain of added value. This supply chain which is built on the same resources but varying claims of ownership, poses novel challenges related to security, trust and privacy of data. There is still no popular system of governing body which can glue together the participating stakeholders through mutual trust and organizational policies. A governing mechanism that can preserve stakeholders' privacy issues and resolve their conflicts throughout the emerging service chains is also non-existent. In this paper we are introducing a mechanism of access control for such Cloud service chains. Building on our pevious work of SLA-based privacy model, we have discussed the realization of Role-based Access Control (RBAC) to services of federated-cloud. The main advantage of RBAC is that it provides an efficient control to resources and data access. We have also provided a preliminary analysis of this on-going research.