An Ambient ASM Model for Client-to-Client Interaction via Cloud Computing

In our former work we have given a high-level formal model of a cloud service architecture in terms of a novel formal method approach which combines the advantages of the mathematically well-founded software engineering method called \emph{abstract state machines} and of the calculus of mobile agents called \emph{ambient calculus}. This paper presents an extension for this cloud model which enables client-to-client interaction in an almost direct way, so that the involvement of cloud services is transparent to the users. The discussed solution for transparent use of services is a kind of switching service, where registered cloud users communicate with each other, and the only role the cloud plays is to switch resources from one client to another.