ITU‐T's Technical Reports and Specifications 447 10 Conclusions Smart sustainable cities are emerging around the globe, with numerous examples of initiatives fostered by local, national and transnational governments and various institutions. Consequently, local administrators and policy makers will be increasingly driven to make their cities more competitive in order to attract businesses, talent and taxpayers, as well as to comply with sustainable policies, including greenhouse gas emission targets and carbon footprint guidelines. SSC deployments will involve multifaceted developments carried out by a diverse ecosystem of providers in innovative domains, as well as the adoption of state‐of‐the‐art technologies characterized by critical and complex ICT implementations. However, the rise in ICT complexity has also translated into increasing levels of vulnerability, both to malicious attacks and to unintentional incidents. The analysis conducted in this Technical Report has explored how leadership and governance are key drivers, as well as essential conditions to ensure cyber resilience and service resilience within smart sustainable cities. Protecting both the systems and the data with rigorous policies, up‐to‐date technology and techniques, will prove vital in ensuring the continuity and the resilience of all the services involved in the SSC architecture. Only by conceiving interconnected urban systems with security and information protection in mind, SSC administrators will be able to ensure the safety and the well‐being for citizens and businesses alike. Security threats and defensive strategies are now an integral part of the discussion in the policy making boardrooms, as much as they are in the private sector. Public administrators know that any serious incident or breach could result in devastating outcomes in terms of financial, data, credibility and reputation loss. Thus, city planners and administrators should take proactive steps to ensure systems' security and data protection from the early stages of the SSC's inception and planning process. This constitutes a crucial step towards building resilient, smart sustainable cities for the twenty‐first century.