LY Corporation—Suffered major data breach affecting 520,000 users due to shared infrastructure with Korean parent
In October 2023, LY Corporation suffered a data breach when hackers accessed systems through affiliate NAVER Cloud. The breach leaked 440,000+ items of personal data including users' age group, gender, and service histories. The incident stemmed from shared Active Directory authentication with former parent company Naver. Japan's Ministry of Internal Affairs issued administrative guidance twice in 2024, calling for system separation from Naver.
Scoring Impact
| Topic | Direction | Relevance | Contribution |
|---|---|---|---|
| Data Security | -against | primary | -1.00 |
| User Privacy | -against | secondary | -0.50 |
| Overall incident score = | -0.332 | ||
Score = avg(topic contributions) × significance (high ×1.5) × confidence (0.59)× agency (negligent ×0.5)
Evidence (1 signal)
Suffered major data breach affecting 520,000 users due to shared infrastructure with Korean parent
In October 2023, LY Corporation suffered a data breach when hackers accessed systems through affiliate NAVER Cloud. The breach leaked 440,000+ items of personal data including users' age group, gender, and service histories. The incident stemmed from shared Active Directory authentication with former parent company Naver. Japan's Ministry of Internal Affairs issued administrative guidance twice in 2024, calling for system separation from Naver.