LG Uplus, KISA Enhance AI-Based Voice Spam Detection

Building a Spam Number Information-Sharing System Cooperating on Damage Prevention Campaigns

Technology|
| Updated 2026.07.07. 17:53:31
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By Kim Ki-hyuk
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Choi Yoon-ho (right), head of LG Uplus's AI Business Group, and Shin Dae-kyu, head of the Digital Infrastructure Division at the Korea Internet & Security Agency, pose for a photo at LG Uplus's Magok headquarters on Nov. 7. Photo courtesy of LG Uplus - Seoul Economic Daily Technology News from South Korea
Choi Yoon-ho (right), head of LG Uplus's AI Business Group, and Shin Dae-kyu, head of the Digital Infrastructure Division at the Korea Internet & Security Agency, pose for a photo at LG Uplus's Magok headquarters on Nov. 7. Photo courtesy of LG Uplus

The Korea Internet & Security Agency (KISA) will strengthen its artificial intelligence (AI)-based voice spam detection and blocking system together with LG Uplus (032640.KS), the agency said Friday.

The two sides signed a memorandum of understanding (MOU) for strengthening voice spam response at LG Uplus's Magok office that day. The agreement centers on linking KISA's spam-number blocking system with the spam analysis technology of LG Uplus's "ixi-O." It was pursued to detect and block voice spam sender numbers more broadly.

Ixi-O is an AI-powered call service that LG Uplus launched in November 2024. It is characterized by user protection features such as voice spam risk analysis and real-time voice phishing risk detection.

KISA has operated a spam-number blocking system that analyzes routine spam report and detection data, shares frequently reported phone numbers with mobile carriers and others in real time, and blocks them swiftly. Under the agreement, KISA will receive spam phone numbers analyzed and extracted by LG Uplus's ixi-O spam engine and use them for protective measures such as blocking incoming calls for users. KISA's approximately 15 million annual voice spam data points will be shared with LG Uplus to contribute to improving the analysis accuracy of AI-based spam engines such as ixi-O.

The two sides also plan to cooperate on joint publicity activities to prevent damage from illegal spam. Choi Yun-ho, head of LG Uplus's AI Business Group, said, "We will contribute to revitalizing the spam reporting ecosystem while continuously expanding the virtuous cycle of public-private data, creating an environment where customers can use telecommunications services more safely."

Original reporting by Kim Ki-hyuk for Seoul Economic Daily.

AI-translated from Korean. Quotes from foreign sources are based on Korean-language reports and may not reflect exact original wording.

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