Reliable. Teacher Cui from Husai University gives simple lectures, is good at summing up, explains clearly and has rich cases, so Teacher Cui from Husai University is more reliable. Husai University is a comprehensive company that relies on North China Electric Power University, devotes itself to the education, training and service of information security talents, and provides services to information security service. Adhering to many years' experience in teaching and training information security talents, we have continuously trained information security talents for the country and society, and at the same time engaged in achievements transformation, technology development and consulting services in the field of information security.