There are cases where criminals use encrypted communication software to assist in organizing illegal activities. While some encrypted communication software provides certain privacy protection, it is also used by criminal gangs. They may use these software to plan criminal activities, such as organizing drug trafficking, smuggling, illegal assembly, fraud and other illegal and criminal activities, coordination, command and information transmission. For example, in some cross-border criminal cases, criminals use encrypted communication software to evade the monitoring and tracking of law enforcement agencies, secretly discuss criminal plans, arrange division of labor, and transmit information about stolen money and stolen goods. Law enforcement agencies are also constantly strengthening the crackdown and supervision of illegal and criminal activities using encrypted communication software, and respond to such challenges through various means such as technical means and international cooperation to maintain social security and the rule of law.