The report examines 834 cases concerning cybersecurity，which are categorized into 9 groups，in criminal proceedings in 2018. The cases number increased steadily，while the proportion of tort trials upon citizens’ personal information was still more than 50%. The technical issue concerning cybersecurity in criminal proceedings is the distinction among crime of illegally obtaining data in computer information systems，crime of providing the tools for intruding and illegally controlling computer information system，and crime of assisting criminal activities in information network. The case concerning with infringement of citizens’ personal information shows that leaking secrets by insiders is a critical reason for data disclosure. Among them，the largest source of leaks is data controllers in real estate sector，such as property companies，real estate companies，and real estate associations in 2017；while it is data controllers related to motor vehicles，such as the Public Security Bureau，Vehicle Management Office and the Transportation Bureau in 2018. In the perspective of illegally obtaining data，the game system，which replaced the mobile phone and mailbox system in the previous year，became the most vulnerable system in cyber society.