Natural catastrophes, industrial accidents, as well as global political threats and their consequences are complex perils that require comprehensive and resilient strategies for catastrophe and crisis management. In crisis situations, the protection of the population as well as the safety of rescue teams, communications systems, and supply infrastructure must all be ensured. Fail-safe information transmission and processing are prerequisites for early warning and coordination of aid teams. Active communications with and via the population must be ensured in crisis situations as well. Making use of increasingly specialized networking offers a big opportunity. It is also necessary to detect perils early in fighting and preventing terrorism and crime. The challenge here consists of developing and implementing secure systems that protect the population from harm on one hand, and on the other preserve individual rights and privacy.