Following US House of Representatives Speaker Nancy Pelosi’s visit to Taiwan, China has not only launched military exercises to intimidate the nation, but also intensified its information warfare activities. The government should therefore not only strengthen its national defense capabilities, but also boost its information warfare prevention efforts. First, it should close information security loopholes in electronic communications equipment. During Pelosi’s visit, video screens in 7-Eleven convenience stores and railway stations were hacked to display anti-Pelosi messages. Investigations revealed that the advertising media firms that set up the screens used Chinese software, which likely were embedded with backdoor programs to make