THE MODERN complex network systems, including communication network, social network and smart grid, have become a key focus of security analysis nowadays. With increasing interconnection of local networks, growing communication traffic and user demand, Integrated Security Analysis on Cascading Failure in Complex Networks as well as diversifying services and emerging new technologies, the complex systems are becoming increasingly sophisticated to operate coordinately. One of many threats posed to complex network systems due to the large scale inter-connectivity is the cascading failure. Integrated Security Analysis on Cascading Failure in Complex Networks A small contingency or failure could trigger a series of chain effects across the entire system, causing a massive impact to the network operation and services . A notable case of cascading failure threats has been witnessed in power infrastructure, where blackouts, or large scale outages due to failure propagation, have affected millions of people after some disastrous cascading failures . As a practical complex network system with unique physical properties affecting Integrated Security Analysis on Cascading Failure in Complex Networks cascading failures, the electrical power infrastructure is chosen as a study case for the integrated security analysis of cascading failure against malicious attacks in this paper. It is notable that the threat of cascading failures, which is usually caused by extreme random events in the past, can be intensified by the growing integration and utilization of computer-based control and communication networks. While development of automation and intelligence brings significant benefits to the complex systems and networks, e.g. the Internet, social and business networks, and power grids alike, it is inevitable that this upgrade also comes with growing risks and complexity of cyber-security issues. Integrated Security Analysis on Cascading Failure in Complex Networks Take the future intelligent power infrastructure, i.e. the Smart Grid, as an example: studies have put forward the fact that intelligence will bring new security challenges to the power grid, a gigantic system that already yields inherent structural vulnerability of cascading failures due to its physical nature. For instance, malicious attackers can take advantage of the potential open access from smart meters in the Advanced Metering Infrastructure (AMI) to plan the attack with intelligence collected from their penetration, so that they can maximize the impact of their attacks . Integrated Security Analysis on Cascading Failure in Complex Networks Therefore, how to secure a complex network system like power grid against cascading failures has been motivating development of models and methodologies to simulate potential selective attacks that result in cascading failures in a power system with the consideration of specific network physical properties. These studies will contribute to both defensive strategies and decision supports to protect the critical components in the complex systems.