Cybersecurity 2026

SOUTH KOREA Trends and Developments

Trends and Developments Contributed by: Hwan Kyoung Ko, Tae Joo Kim, Jaeyoung Chang and Ji Hoon Kim Lee & Ko

Lee & Ko was established in 1977 and is one of Korea’s premier full-service law firms, consistently ranked at the highest level by leading domestic and international legal directories for its professional ex - cellence and client satisfaction. The firm’s reputation is grounded in a long-standing tradition that values substance over form, emphasising specialisation, professionalism and a deep commitment to client needs. Lee & Ko offers comprehensive, one-stop so - lutions through nationally recognised practice groups

covering all major areas of law. Its collaborative sys - tem ensures seamless co-ordination among special - ists to address complex, multidisciplinary matters efficiently. In addition to distinguished attorneys, the firm’s multidisciplinary team includes accountants, patent agents and former senior government offi - cials, enabling it to deliver practical, timely and stra - tegic advice across a broad spectrum of legal and regulatory issues.

Authors

Hwan Kyoung Ko is a partner at Lee & Ko and heads the data privacy and cybersecurity team, tech and AI team and platform regulation response team. He is widely recognised as a leading expert in data protection and

a standout lawyer and a leading lawyer in TMT by major legal directories and is ranked in Chambers Asia-Pacific.

Jaeyoung Chang is a senior foreign attorney in the corporate practice group at Lee & Ko. He advises on foreign investment, joint ventures, cross-border transactions, telecommunications, e-commerce,

cybersecurity in Korea. He has advised major domestic and global companies on high-profile data breach investigations, regulatory proceedings and enterprise-wide data governance projects. He also advised on amendments to the Personal Information Protection Act and the Credit Information Act. Mr Ko serves as vice chairperson of the Korea Personal Information Protection Law Association and is a member of several government AI and data policy committees.

data protection, cybersecurity, and general corporate and regulatory matters. He also has substantial experience in real estate financing and restructuring, representing both creditors and borrowers. Prior to joining Lee & Ko in 2015, he served as in-house counsel at a multinational corporation, managing cross-border financing and overseas investment projects. Mr Chang received his JD from Fordham University School of Law and is admitted to the New York State Bar.

Tae Joo Kim is a partner at Lee & Ko with over 15 years of experience in the automobile, TMT, data protection, fintech, antitrust, anti-corruption and

M&A sectors. He advises leading domestic and global companies on licensing, regulatory compliance, investigations and complex transactions, particularly in telecommunications, media, mobility and connected car services. His clients include major Korean telecom and media companies, global platform operators and international automakers. Recognised for his market-leading expertise, he has been named

Ji Hoon Kim is a partner at Lee & Ko’s TMT practice group, advising clients on a broad range of technology, media and

telecommunications matters, as well as on corporate law, data protection and privacy, and regulatory compliance. His practice focuses on data privacy and cybersecurity, regulatory investigations and litigation, cyber

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