In South Asia, every state has applied its own classified security measures for nuclear weapons security. In Pakistan, a nuclear weapons security regime involves human, physical and technical means. However, there is a general perception that, notwithstanding these technical measures, there is a danger that nuclear materials may possibly get into the hands of terrorist organisations. The future of illicit trade of nuclear materials in South Asia by non-state actors and terrorists may further jeopardise the security of the region. South Asian states are facing the threat of terrorism and violent extremism. The unending civil war in Afghanistan and Pakistan has destabilised the whole region. These are some of the issues deliberated in the book by eminent scholars.