KT 개인정보 유출 규모 1만6000명으로 줄어…과징금 수위 변수로

KT's personal data breach case exemplifies the evolving landscape of South Korea's regulatory penalties for cybersecurity incidents. The reduction of breach scale from 22,227 to 16,000 users—excluding corporate accounts—will significantly influence the forthcoming penalty decision, as regulators balance proportionality with the precedent set by Coupang's record 600 billion won fine. The outcome will shape enforcement standards and financial consequences for future data breach violations in the Korean market.