Terrorist use of the internet and legal response

Without doubt terrorist organisations today are using the Internet for various purposes. Unlike the early debate when the focus was on potential terrorist-related network-based attacks against critical infrastructure and the use of information technology in armed conflicts (cyberwarfare), it is widely recognised that the range of activities is more complex.1 Terrorist use of the Internet includes research, training, propaganda and communication.2 But despite more intensive research many aspects are still uncertain as reports about concrete incidents often remain classified. The following article provides an overview of the different areas of terrorist use of the Internet and the concept of legal response.