eng Science and Education Publishing Journal of Computer Sciences and Applications 2328-725X 2015-07-16 3 3A 1 9 10.12691/jcsa-3-3A-1 JCSA201533A1 article William Hurst w.hurst@ljmu.ac.uk 1 Chelsea Dobbins 1 School of Computing and Mathematical Sciences, Liverpool John Moores University, Liverpool, UK The amount of information that is being created, every day, is quickly growing. As such, it is now more common than ever to deal with extremely large datasets. As systems develop and become more intelligent and adaptive, analysing their behaviour is a challenge. The heterogeneity, volume and speed of data generation are increasing rapidly. This is further exacerbated by the use of wireless networks, sensors, smartphones and the Internet. Such systems are capable of generating a phenomenal amount of information and the need to analyse their behaviour, to detect security anomalies or predict future demands for example, is becoming harder. Furthermore, securing such systems is a challenge. As threats evolve, so should security measures develop and adopt increasingly intelligent security techniques. Adaptive systems must be employed and existing methods built upon to provide well-structured defence in depth. Despite the clear need to develop effective protection methods, the task is a difficult one, as there are significant weaknesses in the existing security currently in place. Consequently, this special issue of the Journal of Computer Sciences and Applications discusses big data analytics in intelligent systems. The specific topics of discussion include the Internet of Things, Web Services, Cloud Computing, Security and Interconnected Systems. http://pubs.sciepub.com/jcsa/3/3A/1/jcsa-3-3A-1.pdf critical infrastructure data analytics cyber security data analysis real time sensors machine learning intrusion detection control system cloud computing data fusion web services