Ways of computer leakage:
Leakage of computer electromagnetic radiation: computer radiation mainly includes four parts: radiation of display, radiation of communication line, radiation of host computer and radiation of output equipment. The computer works through a high-frequency pulse circuit. Due to the change of electromagnetic field, electromagnetic waves will inevitably radiate outward and bring information out of the computer. Criminals can receive electromagnetic waves and steal secret information as long as they have corresponding receiving equipment.
Computer networking leaks: After computer networking, transmission lines are mostly composed of carrier lines and microwave lines, which greatly increases the channels and scope of computer leaks.
Computer media leakage: When the computer breaks down, the hard disk containing secret information is taken out for maintenance without handling or supervision, which leads to leakage. Secret information and non-secret information are placed on the same media, and publicity and confidentiality are indistinguishable, which is easy to cause leaks.
Leaks by computer workers: There are three kinds of leaks by computer workers: ignorance, violation of rules and regulations, and intentional leaks. Foreign intelligence agencies often use money to buy and betray computer workers in other countries and steal secrets from information systems.
The channels for leaking state secrets are: leaking secrets in foreign exchanges and cooperation; News publicity and publication leaks; Vulnerabilities in communication and office automation; Leak in information consulting service; Leaks caused by the flow of personnel; A few people are driven by self-interest and illegally provide or sell state secrets.