Security is one of the key pillars on which a stable society is built, and which guarantees the rights of its members. One of the modern strategies -- human security -- potentiates that economy, environment, security, social conditions and law are the main attributes and functions that provide citizen's with prosperity, a sense of safety and integrity. Good socio-economic conditions, healthy environment and respect for human rights provide a state with political and democratic strength. It also allows for business to be stronger and progressive. This edition aims to provide some of the key challenges for modern societies so that scientists may explain them and give some solutions for better risk and crisis management. Scientists and researchers from different areas and universities analysed risks from areas of IT, global health, migrations, social engineering, nuclear weaponry, environmental protection, private anti-crime business and different security policies. One of the aims of this edition is to explain how important it is to recognise all different challenges, not to neglect them, but to provide them with all possible legal solutions, technical solutions and knowledge to protect people, society and state from qualitatively different risks and consequences. Through this edition, experts and researches have tried to provide actual reviews of challenges of the twenty-first century and possible solutions for their understanding, prevention and/or minimalising damages in emergency situations.