[사이언스 인 미디어]Can voice phishing be prevented with ICT?

“Are you Mi-hyun Kang or Seo-jun Han’s wife?”

A call from an unfamiliar number. The caller, a lawyer, said that a worker at a construction site suffered a safety accident due to her husband’s mistake.

The wife, who was not in a good condition, sends 70 million won to her husband when she can’t talk to her on the phone. The voice phishing organization cheers that the operation was successful. Seo-joon (Byun Yo-han) and her family are not the only victims of voice phishing.

After 3 billion won is stolen from a construction site worker who is living a difficult life, from apartment rentals to his daughter’s hospital bills, former police officer Seo-jun decides to go to China for revenge.

Seo-joon, who has difficultly approached the base of a Chinese voice phishing organization, is surprised at the scale. A corporate voice phishing criminal organization equipped with personal information collection and planning, currency exchange, withdrawal, and a large-scale call center plans a large-scale operation worth more than 30 billion won.

The film’s voice phishing crew were confident that they succeeded in portraying the reality of the voice phishing crime through meticulous field investigations, case collections, thesis, and coverage. The fact that the organization and precision of the voice phishing organization that appears in the movie is real is scary.

The data proves that the damage caused by voice phishing that has evolved into a corporate type is snowballing due to the spread of non-face-to-face culture caused by COVID-19. According to the prosecution, the amount of voice phishing damage and the number of damages in 2020 recorded 700 billion won and 39,713 cases, respectively, and the refund rate of the damage amount was only about 48.5%. In the face of the COVID-19 era, voice phishing is focusing on the common people, such as disaster relief funds and loans for small businesses, adding to the sadness of the weak.

Beyond social efforts such as campaigns and guidance to reduce the damage of voice phishing crimes, government and corporate efforts to prevent voice phishing using information and communication technology (ICT) continue.

In order to block the change of the caller number by the police and prosecutors, which are the starting stage of voice phishing, the Korea Internet & Security Agency (KISA) traces the route of transmission of calls and texts reported through the Caller Number Change Report Center to confirm the origin of the database (DB). to build The telecommunication company is operating a system to check the caller number of voice calls received from the switchboard with KISA’s modified number DB and block it if an abnormality is detected.

The Financial Supervisory Service made it mandatory for financial companies such as banks to build an abnormal financial transaction detection system (FDS) and to apply artificial intelligence (AI) and big data technologies. The Financial Security Agency and the Korea Financial Telecommunications & Clearings Institute are upgrading their services by sharing data.

The Ministry of Science and ICT is developing technologies to predict voice phishing in advance by applying AI technology or to detect fake voices such as recording and synthesis by applying deep learning technology as a national R&D project. It is expected to have a significant effect even if only a notification that the call is suspicious to the user through an application or the like is possible.

The challenge of ICT to preemptively respond to intelligent voice phishing crimes continues. It seems that the most effective way to prevent voice phishing crimes is to raise awareness of individual users at the same time.

By Park Ji-sung, staff reporter [email protected]

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