YoungJin is a co-founder of Wellbia.com Co., Ltd., a security company in South Korea. YoungJin has developed anti-cheat program called XIGNCODE3 since 2007. He writes several PC security programs like PC Firewall, Anti-Spyware, and Keyboard Security Software.
He has contributed a number of articles about Windows programming to Microsoftware, the famous magazine of Korea. He also hosts a blog (http://www.jiniya.net) that includes articles about system programming on Windows.
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