Wiretapping
Overview
Wiretapping (盜聽, wiretapping·eavesdropping) refers to the act of secretly listening to, recording, or logging the contents of communications and conversations transmitted over telephone, internet, and other communication lines or occurring in private spaces, without the consent of the parties to the conversation. As a representative act that infringes on the secrecy of communications and the freedom of private life, it encompasses both surveillance by state agencies for investigative purposes and illegal wiretapping by private individuals, and the laws of each country permit it only exceptionally, under strict requirements.
Main Content
Concept and Types
Wiretapping is divided into various methods according to target and means. The traditional methods are wired tapping, which intercepts electrical signals by directly connecting to a line; wireless tapping, which captures radio waves; and optical tapping, which analyzes refracted light in optical fibers. In the internet era, these are combined with sniffing, which surreptitiously inspects network packets; infection of devices through malicious code and spyware; interception of mobile communications using fake base stations (IMSI catchers); and remote control of microphones and cameras. It is also classified into 'direct wiretapping,' in which a person directly eavesdrops on a conversation, and 'indirect wiretapping,' which uses recording devices or software.
Legal Regulation
In Korea, the Protection of Communications Secrets Act is the basic law governing the protection of communications secrecy and surveillance. For an investigative agency to carry out a restriction on communications (surveillance), it must meet the requirements that the case constitutes a serious crime and that investigation is difficult by other means, and must obtain a court warrant; surveillance conducted without a warrant may be excluded as illegally collected evidence. Illegal wiretapping by private individuals is punished for violation of the Protection of Communications Secrets Act, the crime of infringement of secrets under the Criminal Act, and violation of the Information and Communications Network Act, among others. On the other hand, recording one's own conversation as one of the parties to it is generally lawful, but if a third party who is not a party secretly records a conversation between others, it becomes illegal. This boundary has been concretized through judicial precedents.
History
Wiretapping began in the 1890s in the United States, where telephone operators eavesdropped on calls. The 1928 Olmstead decision held that a warrant was not required for wired wiretapping, but the 1967 Katz decision marked a turning point by recognizing the protection of private life as a constitutional right. The 1972 Watergate scandal remains a representative scandal of political wiretapping, and the 2013 revelations by Edward Snowden exposed the U.S. NSA's large-scale communications surveillance programs (such as PRISM). In 2021, it became known that the spyware 'Pegasus' from Israel's NSO Group had infected journalists and politicians around the world, giving full momentum to international regulatory discussions.
Technology and Countermeasures
Analog line wiretapping evolved into packet interception and device infection in digital, internet, and VoIP environments. In response, defensive technologies such as end-to-end encryption (E2EE), virtual private networks (VPN), and quantum cryptography communications have developed, and the conflict between encrypted messengers and the state's surveillance authority is called the 'crypto war.' Recently, attacks that infect devices without user action through zero-click methods have increased, making countermeasures more difficult.
Statistics and Current Situation
The number of surveillance cases carried out by investigative agencies in each country is rarely disclosed as statistics, making it difficult to grasp the actual situation. However, combining the surveillance reports published annually by the U.S. administration, judicial statistics from various European countries, and surveys by civic organizations, lawful surveillance is on a steady upward trend, and illegal wiretapping is likewise repeatedly uncovered in areas with sharply conflicting interests, such as in the work of private detectives, corporate espionage, and divorce litigation.
Latest Trends
The trends of 2024–2025 can be summarized as ① strengthening regulation of commercial spyware, ② large-scale call analysis using AI, and ③ reform of laws and institutions. Following the investigation by the European Parliament's PEGA Committee, the EU is discussing regulations on oversight of member states' governments' use of spyware, and the United States continues to impose sanctions on commercial spyware companies such as NSO Group. Section 702 of the U.S. FISA was reauthorized in April 2024, extending the authority for overseas intelligence collection. With the spread of AI voice recognition and real-time transcription technology, the cost of automatically analyzing large volumes of wiretapped data has plummeted, while new technologies such as 5G, satellite communications, and quantum cryptography have become new battlegrounds for surveillance and defense. In Korea as well, the amendment of the Protection of Communications Secrets Act, Constitutional Court rulings over the scope of provision of communications data, and the issue of the National Intelligence Service's surveillance authority remain continuing points of contention.
Related Topics
- [[Protection of Communications Secrets Act]]
- [[Privacy]]
- [[Spyware]]
- [[Surveillance]]
- [[Encryption]]