The goal of this research study was to identify how to assess data security in private universities wireless network: case study Thika Sub County. Three main research goals(Dang et al.,2021), guided the investigation effectively, which was accomplished by the use of a survey approach. During the study, the population comprised 13800 students from various selected universities around Thika subcounty, whereby a population of 388 students was to be chosen using basic random selection criteria. The study hypothesis will be evaluated using statistical analysis such as chi-square and the statistical profile was examined using descriptive statistical analysis such as frequency tables and proportions. According to the study, (Nishanth et al.,2021). a considerable number of pupils of private universities in Thika subcounty facing a lot of challenges when using wireless data, which has a major influence on their academic participation and performance and as a result the general public. The study proposed that strong data security was to be applied to all the university networks to avoid(Fang et al.,2020) unauthorized access. That public opinion was applied to gain a better data security network in all private universities. Lastly, that data security in a wireless network considered and be given first priority in all fields to ensure better security of confidential work.