Is a VPN Illegal in South Korea? And Do You Need One?

Most people in Korea don’t need a VPN running all the time. I found no Korean law that bans using one, and Korean government guidance recommends VPNs for sensitive remote work. A VPN helps most on open public Wi-Fi and when you’d rather not show websites your IP address. It doesn’t make illegal content legal, and it isn’t a way around the blocks behind warning.or.kr.

Is using a VPN illegal in South Korea?

I looked for a Korean law that bans VPNs and didn’t find one. What official sources say points the other way. KISA, the Korea Internet & Security Agency, tells companies whose staff work outside the office: “외부에서 민감한 업무 수행이 필요할 경우 VPN 환경을 구축해요” (if sensitive work has to be done from outside, set up a VPN) (KISA 보호나라). The Personal Information Protection Commission’s security standard, 개인정보의 안전성 확보조치 기준, names “가상사설망 등 안전한 접속수단” (a virtual private network or other secure means of access) as one way to reach some systems holding personal data from outside (Article 6) (국가법령정보센터).

What stays illegal is what you do, VPN or not. As of November 2026, Korean law includes these:

• Gambling. “도박을 한 사람은 1천만원 이하의 벌금에 처한다” (a person who gambles faces a fine of up to ten million won), unless it’s only passing amusement (형법 제246조, the Criminal Act) (국가법령정보센터).
• Copyright infringement. Infringing someone’s economic rights by copying, public transmission or distribution can bring “7년 이하의 징역 또는 1억원 이하의 벌금” (up to seven years in prison or a fine of up to one hundred million won), or both (저작권법 제136조, the Copyright Act) (국가법령정보센터).
• Some material is a crime to watch, not only to share. Anyone who buys, possesses or views child sexual exploitation material (“구입ㆍ소지 또는 시청한 자”) faces at least one year in prison (아동ㆍ청소년의 성보호에 관한 법률 제11조 제5항) (국가법령정보센터). Possessing, buying, storing or viewing illegally filmed sexual images is also a crime (성폭력범죄의 처벌 등에 관한 특례법 제14조 제4항) (국가법령정보센터).

This isn’t legal advice. Follow Korean law, and ask a lawyer about your own situation.

What about “illegal software crackdowns”?

“불법 소프트웨어 단속” is about illegally copied software. The Ministry of Culture, Sports and Tourism has described its copyright special judicial police cracking down on “불법복제 소프트웨어를 사용하는 기업” (companies using illegally copied software) (문화체육관광부, 2013). So the question is whether a copy is licensed, not whether it’s a VPN. A cracked VPN client is a bad idea for another reason too: KISA warns that cracked software from unofficial sources “악성코드가 숨어 있을 수 있어요” (may hide malware) (KISA 보호나라).

Why some sites show warning.or.kr

Korea’s Network Act (정보통신망 이용촉진 및 정보보호 등에 관한 법률) says no one may distribute illegal information over a network. Its list includes obscene material and “법령에 따라 금지되는 사행행위에 해당하는 내용의 정보” (information about gambling banned by law) (Article 44-7) (국가법령정보센터). A review commission, 방송미디어통신심의위원회, reviews that information and can issue corrective requests (방송미디어통신위원회의 설치 및 운영에 관한 법률 제22조) (국가법령정보센터). After that review, 방송미디어통신위원회 can order online service providers to refuse, stop or restrict handling it (Network Act Article 44-7(3)).

What you see. The notice at warning.or.kr says the site was blocked because it provides illegal or harmful content, and that it was “방송미디어통신심의위원회의 심의를 거쳐 … 적법하게 차단 된 것” (lawfully blocked after the commission’s review). It lists the categories and who handles each, among them illegal gambling, illegal drug and medicine sales, obscene material and prostitution, counterfeit goods, pirated copies, defamation and digital sex crime material (warning.or.kr).

Why secure (https) sites get blocked too. The Constitutional Court explained it in decision 2019헌마158 of October 26, 2023. On February 11, 2019, 방송통신심의위원회, the review commission at the time, asked ten service providers to block 895 websites. Older methods worked through DNS, sending you to a block notice page instead of the site, or by reading the URL, and they stopped working once https became common. With https “주고받는 데이터가 대부분 암호화되지만” (most of the data is encrypted), the SNI, the part that names the site you want, is sent unencrypted, and SNI blocking detects it and cuts the connection. The Court held that the request did not violate the complainants’ “통신의 비밀과 자유 및 알 권리” (secrecy and freedom of communications and right to know) (국가법령정보센터).

So a blocked site may show the notice page, or it may simply not load. Two more points from the notice page itself. The real page “개인정보를 요구하거나 프로그램 설치를 유도하지 않습니다” (doesn’t ask for personal information or try to get you to install a program), and pharming sites imitating it have been found. And a site’s operator can object to the commission within 15 days of a corrective request (warning.or.kr).

I won’t explain how to get around these blocks, and Mistero isn’t made for that.

What a VPN does for you in Korea

On public Wi-Fi. KISA’s tips for individuals say to be careful on open Wi-Fi without a password: “공개형 WIFI는 누군가 내 통신내용을 훔쳐보고 있을 수 있어요” (on open Wi-Fi, someone may be watching your communications). Don’t enter logins or financial details there (KISA 보호나라). Seoul’s free public Wi-Fi has two networks: SEOUL_Secure, which the city recommends and which uses WPA2 or WPA3-Enterprise security, and SEOUL, a general connection you join from a page each time (서울특별시). I’d pick SEOUL_Secure where it’s offered, and turn a VPN on for open networks. More on the real risks in is public Wi-Fi safe?

Your IP address. A VPN changes the route your traffic takes and the IP address websites see; What is my IP shows the change. It doesn’t make you anonymous, and sites you sign in to still know it’s you. Both are covered in what a VPN actually changes.

What it doesn’t change. It doesn’t make anything legal. And you trust the VPN company instead of your network. KISA itself warns “일부 VPN 업체들이 접속 정보를 취합하여 이를 제3자에게 판매하거나, 악용하는 경우가 있어요” (some VPN companies collect connection information and sell it to third parties or misuse it), and says to use a VPN product you can trust (KISA 보호나라). At home on your own network, I wouldn’t bother keeping one on all day.

If you’re visiting Korea

Seoul’s public Wi-Fi is free for anyone, on streets and in markets, parks, bus stops and tourist spots. For SEOUL_Secure, the ID and password are both “seoul” (서울특별시). The usual checks for airport Wi-Fi and hotel Wi-Fi apply here too.

Korean criminal law applies to foreigners as well as Koreans for crimes committed in Korea (형법 제2조, the Criminal Act) (국가법령정보센터). Blocks are applied by Korean internet providers, so on a Korean network you may see the same notice page residents do.

Where Mistero fits

Mistero can’t make anything legal, and it isn’t for getting around a block ordered by the commission, a court or anyone else. It also doesn’t make you anonymous.

What it does, in the App Store listing’s words: “Connect with one tap on public Wi-Fi,” “Mask your IP address while the VPN is active” and “Turn on Kill Switch to help stop network traffic if the VPN disconnects.” You choose from “available VPN locations,” and the security checks can “Check Wi-Fi for visible connection or DNS anomalies” (App Store listing, read Nov 9, 2026). More on Mistero VPN.

Sources

• KISA 보호나라, [범국민 인식제고] 정보보호 실천수칙(기업편) - 포스터 (2020-09-18): https://www.boho.or.kr/kr/bbs/view.do?bbsId=B0000127&menuNo=205021&nttId=35806 (read Nov 9, 2026)
• KISA 보호나라, [범국민 인식제고] 정보보호 실천수칙(개인편) - 포스터 (2020-09-17): https://www.boho.or.kr/kr/bbs/view.do?bbsId=B0000127&menuNo=205021&nttId=35669 (read Nov 9, 2026)
• 국가법령정보센터, 개인정보의 안전성 확보조치 기준 (개인정보보호위원회고시 제2026-9호): https://www.law.go.kr/%ED%96%89%EC%A0%95%EA%B7%9C%EC%B9%99/%EA%B0%9C%EC%9D%B8%EC%A0%95%EB%B3%B4%EC%9D%98%EC%95%88%EC%A0%84%EC%84%B1%ED%99%95%EB%B3%B4%EC%A1%B0%EC%B9%98%EA%B8%B0%EC%A4%80 (read Nov 9, 2026)
• 국가법령정보센터, 형법 제246조(도박, 상습도박): https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%ED%98%95%EB%B2%95/%EC%A0%9C246%EC%A1%B0 (read Nov 9, 2026)
• 국가법령정보센터, 형법 제2조(국내범): https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%ED%98%95%EB%B2%95/%EC%A0%9C2%EC%A1%B0 (read Nov 9, 2026)
• 국가법령정보센터, 저작권법 제136조(벌칙): https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%EC%A0%80%EC%9E%91%EA%B6%8C%EB%B2%95/%EC%A0%9C136%EC%A1%B0 (read Nov 9, 2026)
• 국가법령정보센터, 아동ㆍ청소년의 성보호에 관한 법률 제11조(아동ㆍ청소년성착취물의 제작ㆍ배포 등): https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%EC%95%84%EB%8F%99%E3%86%8D%EC%B2%AD%EC%86%8C%EB%85%84%EC%9D%98%EC%84%B1%EB%B3%B4%ED%98%B8%EC%97%90%EA%B4%80%ED%95%9C%EB%B2%95%EB%A5%A0/%EC%A0%9C11%EC%A1%B0 (read Nov 9, 2026)
• 국가법령정보센터, 성폭력범죄의 처벌 등에 관한 특례법 제14조(카메라 등을 이용한 촬영): https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%EC%84%B1%ED%8F%AD%EB%A0%A5%EB%B2%94%EC%A3%84%EC%9D%98%EC%B2%98%EB%B2%8C%EB%93%B1%EC%97%90%EA%B4%80%ED%95%9C%ED%8A%B9%EB%A1%80%EB%B2%95/%EC%A0%9C14%EC%A1%B0 (read Nov 9, 2026)
• 문화체육관광부, 소프트웨어 불법복제 단속 강화 및 예방활동 전개 (2013.02.19): https://www.mcst.go.kr/kor/s_notice/press/pressView.jsp?pSeq=12578 (read Nov 9, 2026)
• 국가법령정보센터, 정보통신망 이용촉진 및 정보보호 등에 관한 법률 제44조의7(불법정보 및 허위조작정보의 유통금지 등): https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%EC%A0%95%EB%B3%B4%ED%86%B5%EC%8B%A0%EB%A7%9D%EC%9D%B4%EC%9A%A9%EC%B4%89%EC%A7%84%EB%B0%8F%EC%A0%95%EB%B3%B4%EB%B3%B4%ED%98%B8%EB%93%B1%EC%97%90%EA%B4%80%ED%95%9C%EB%B2%95%EB%A5%A0/%EC%A0%9C44%EC%A1%B0%EC%9D%987 (read Nov 9, 2026)
• 국가법령정보센터, 방송미디어통신위원회의 설치 및 운영에 관한 법률 제22조(심의위원회의 직무): https://www.law.go.kr/%EB%B2%95%EB%A0%B9/%EB%B0%A9%EC%86%A1%EB%AF%B8%EB%94%94%EC%96%B4%ED%86%B5%EC%8B%A0%EC%9C%84%EC%9B%90%ED%9A%8C%EC%9D%98%EC%84%A4%EC%B9%98%EB%B0%8F%EC%9A%B4%EC%98%81%EC%97%90%EA%B4%80%ED%95%9C%EB%B2%95%EB%A5%A0/%EC%A0%9C22%EC%A1%B0 (read Nov 9, 2026)
• warning.or.kr, 불법·유해정보사이트에 대한 차단 안내: http://warning.or.kr/ (read Nov 9, 2026)
• 헌법재판소 (국가법령정보센터), 웹사이트 차단 위헌확인 [전원재판부 2019헌마158, 2023. 10. 26.]: https://www.law.go.kr/%ED%97%8C%EC%9E%AC%EA%B2%B0%EC%A0%95%EB%A1%80/%282019%ED%97%8C%EB%A7%88158%29 (read Nov 9, 2026)
• 서울특별시, 서울 무료 와이파이 SEOUL_Secure 마음껏 이용하세요!: https://news.seoul.go.kr/gov/archives/516134 (read Nov 9, 2026)
• App Store, Mistero VPN: Privacy & Proxy: https://apps.apple.com/app/id1583175414 (read Nov 9, 2026)