This special issue presents a wide range of complex networks theoretical works and applications focused on social environments such as Information Spreading in Social Media, Rumor and Viral Marketing, Quantifying Success through Social Network Analysis, Human behavior & mobility, Social Reputation, Influence, and Trust.

Network analysis may play a considerable role in the new setup. However, security becomes a major issue when it comes to big data and network analysis in a distributed environment. Therefore, big data analysts, network security experts, and data scientists hold a prominent position in the current era, where data scientists are highly needed and there is a visible shortage in the market. This special issue highlights the challenges and solutions of Deep Learning and Network Security algorithms for Big Data, to improve the effectiveness for data security.