Using unmanned aerial vehicles (drones) in security has become common in the Czech Republic. This paper focuses on using drones as an example of the application of smart technologies in conjunction with the Internet of Things (IoT) and state security forces, especially in cooperation with the police, fire and medical emergency services in the context of the new Smart Cities concept. Drones are one of the most suitable examples of use along with IoT within the security sector, which play a key role in the daily protection of citizens' safety, public order security and crisis management. It is related to developing and implementing 5G networks, which allow real-time transmission of data obtained by drones directly to information systems, and is also gaining importance. This technology enables fast and efficient communication between the different actors involved in an intervention and creates a platform for fast and effective emergency response. Among other things, paying attention to cybersecurity, such as securing data transmissions, protecting against cyber threats, complying with security standards and legislation, and introducing special procedures and methodologies applicable in crisis, is essential.