Defence Mechanisms for Public Systems

The third issue of the fourth volume of the EAI transactions on Security and Safety provides an insight to methods and techniques that improve security, resiliency and privacy of modern systems, such as clouds, moving target defense (MTD)-enabled systems and Blockchains. The articles that constitute this issue focus on three main areas. The first one consists of novel methods that can increase detection capabilities of cloud systems; the second one is proposing an MTD evaluation framework; the third is about blockchain technology and its use from lightweight users. In particular, in the area of novel detection methods the issue presents (i) Markovbased models that can be used in order to detect malicious sources engaged in fraudulent use of cloud resources, (ii) cross-layer Bayesian networks for inferring stealthy bridges that exist between enterprise network islands. In the area of MTD-enabled system, the issue presents a generic MTD evaluation framework. Finally regarding blockchain technology the issue presents a novel efficient verification protocol for public blockchain, namely EPBC, which can be used from users with limited resources.