Security has become the most important concept for smart cities lately. Public security and safety, crime, terrorism, cyber security, natural disasters and accidents are covered under the context of security for city administrations. From traditional street fights to complex financial crimes, identity theft or data violation, and a range of many other crimes will be handled by advanced technologies and processes. Remote monitoring systems will become more prevalent in cities. This, combined with the ability for real-time communication, will enable instant responses in emergency situations. Smart Security will provide an opportunity to share skill and information among the related entities right after a severe accident; it will enable the operation of advanced remote monitoring systems, ensure coordination among the parties, collect intelligence data of real-time events and analyze this data and execute all activities in a secure, confidential way. Overall, emergency services will become secure for citizens, companies and entities involved, and the infrastructures will be secure and reliable. Smart Security will provide a rapid measurement and evaluation of potential security risks, and an effective management of communication and coordination to generate smart solutions for a resilient city.