Kharkiv is an IT city, which is very high quality and skillfully pumps this sphere. In March 2020, we launched a new project for cyber security of the city of "Security TXT". It is important to ensure free testing of urban web resources and their continuous improvement. We started from the site of the registration department. Everyone could go to it and find any weak points, shortcomings or technical errors and write moderators. Thus, we controlled the quality of sites and replenished the rating of the "White" hackers and drew up the basis of specialists who help protect the web resources of the city.