1. KISA cyber security issue report: Q2 2020; 2021. Accessed September 04 2021.https://www.boho.or.kr/data/reportList.do.
2. 2021 annual report on copyright protection. Accessed September 04 2021.http://www.mcst.go.kr/kor/s_policy/dept/deptView.jsp?pSeq=1526&pDataCD=0417000000
3. Markany homepage. Accessed September 04 2021.https://www.markany.com
4. Watermark/forensicmark technology. Accessed September 07 2021.https://www.copyright.or.kr/information‐materials/trend/the‐copyright/download.do?brdctsno=9293&brdctsfileno=5089
5. PALLYCON homepage. Accessed September 07 2021.https://pallycon.com