https://blog.sysbot32.com/2016/10/26/ssl-%EC%9D%B8%EC%A6%9D%EC%84%9C%EB%A5%BC-%EB%AC%B4%EB%A3%8C%EB%A1%9C-%EB%B0%9C%EA%B8%89%EB%B0%9B%EB%8A%94-%EB%AA%87-%EA%B0%80%EC%A7%80-%EB%B0%A9%EB%B2%95/
https://blog.sysbot32.com/2016/10/26/ssl-%EC%9D%B8%EC%A6%9D%EC%84%9C%EB%A5%BC-%EB%AC%B4%EB%A3%8C%EB%A1%9C-%EB%B0%9C%EA%B8%89%EB%B0%9B%EB%8A%94-%EB%AA%87-%EA%B0%80%EC%A7%80-%EB%B0%A9%EB%B2%95/