KT announced on the 7th that it has operated its self-developed voice phishing detection service for two months, resulting in an estimated prevention effect of about 16 billion won in damage. The service's detection accuracy was analyzed at 90.3%.
KT commercialized its artificial intelligence (AI)-based voice phishing detection service on Jan. 22. Among the operational data accumulated over the recent two months, there were 1,528 verified cases of voice phishing calls detected with warnings or risk ratings. Of these, 392 cases (25%) were found to be from the Korean National Police Agency's voice phishing blacklist or impersonations of prosecutors or police.
The average amount of damage per case of voice phishing announced by the government last year was about 41 million won. KT noted, "We have achieved a preventive effect of about 16 billion won," saying, "The notification function has proven effective in preventing actual damage." However, it was found that some false detections occurred in normal currencies related to billing or collection, so KT plans to introduce technology to increase accuracy in the future.
KT is also contributing to blocking voice phishing damage in cooperation with the Seoul Metropolitan Police Agency. The collaboration involves linking malicious app installation URLs secured by the police with its own technology. KT provided 3,667 suspicious damage cases to the Seoul Metropolitan Police Agency, which, based on this information, was able to prevent actual damage by contacting victims directly or meeting with them. KT explained that damage amounting to 2.01 billion won was prevented from February to March 2024.
KT is collaborating with Kbank to apply this technology to the financial sector starting this month. When customers receive a call suspected of being voice phishing, real-time detection information will be provided to Kbank.
Lee Byung-mu, head of KT's AX Innovation Support Department, said, "I hope more citizens can prevent damage in advance through the 'Who Who' app, which can be used free of charge by anyone regardless of the telecommunications company."