Theofrastos Koulouris

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Accountability has emerged as a critical concept related to data protection in cloud ecosystems. It is necessary to maintain chains of accountability across cloud ecosystems. This is to enhance the confidence in the trust that cloud actors have while operating in the cloud. This paper is concerned with accountability in the cloud. It presents a conceptual(More)
Peer-to-peer networking enjoys euphoric support and fierce resistance simultaneously, and for the same reasons. It presents a model where decentralization and lack of structure, hierarchy and control are promoted. Although significant research is carried out to tackle individual issues arising from that paradigm, there has been no obvious approach for(More)
Ensuring dependability and security of peer-to-peer (P2P) systems is an intricate task due to the autonomous and volatile nature of peers and the decentralization that characterizes such systems. Dynamic verification provides the means of monitoring aspects of peer behaviour at runtime and the capacity to react to identified violations with the aim of(More)
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