Rapid advances in ICT have now developed in various ways. One of the developments is in Smart Government, which has become a Smart City implementation domain. However, the implementation of a smart government must walk from a cybersecurity point of view to ensure its implementation. This study aims to understand how the implementation of cybersecurity in smart government, especially in smart cities, uses the PRISMA protocol and addresses obstacles and related issues. This approach of PRISMA specifies the implementation of cybersecurity in smart government or cybersecurity in government, smart city, governance, and public service and excludes the duplicate papers that are found in databases. Databases used in this study are Scopus, IEEE Xplore, ACM Digital Library, and ScienceDirect. We found 21 publications that met the criteria and classified the implementation based on the technologies obstacles and issues found in the publications. Based on the classification, the most cybersecurity implementation topic in the smart city was the implementation of an Intrusion Detection System (IDS) in every aspect of the smart city, such as the Fog Layer in Smart city, Smart City Hospital, Internet of Things (IoT), etc. with most publication in 2020 and having incremental from 2022 to 2023. The most concerning obstacle and issue was how to make the availability of the smart city service at a tolerable level when the cybersecurity implementation is implemented. The limitation that occurs in this research is how to address the solution to obstacles and issues from the analysis. © (2024), (Insight Society). All rights reserved.