امنیت داده ها در سیستم های ابری غیر متمرکز Data security in decentralized cloud systems – system comparison, requirements analysis and organizational levels

Introduction Cloud computing receives a lot of attention in terms of research and in practice. Over the years, the use of cloud computing in businesses has been increasing [1]. Individual infrastructure, platform and software services, which are provided by a private computer center via a private cloud system or by an external hosted private cloud system, are now being used in particular [2]. Based on cloud computing technology, new forms of IT resource relocation and their needs-orientated and usedependent provision via commercial services have been established. Moreover, cloud computing has a farreaching potential for the transformation of business models and operative processes, especially supported through system integration [3]. In terms of business information systems, cloud computing is becoming more and more important. Business information systems, as a socio-technological manmachine system, describe the connection between technological components and business staff, in order to fulfill the work tasks [4] and to become the backbone of many modern worlds of employment. The need for decentralization and a technological as well as an organizational new-orientation of information system is increasing because of the increasing distribution of valueadded processes via various companies, a faster and more flexible new-orientation of business partnerships, and an intensive integration of customers into value-added processes [5, 6]. Current developments in information technology and communication technology, including keywords, for example, such as “Internet of Things” [7], “Cyber Physical Systems” [8], “Emergent Software Systems” [9], or “Fog Computing” [10], are supporting a higher decentralization of information systems. In this context, cloud systems are offering an infrastructural solution. Via Internet connection and the provision of software solutions and integration solutions according to the “As-a-Service-Paradigma”, various decentralized components of an information system can be integrated. Though cloud systems are a stable technological basis for the provision and cooperation of information systems, missing solutions in terms of data security are inhibiting the broad utilization of this technology in businesses