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<span>English : http://www.repo.kr/2016/12/seccon-2016-online-ctf-binarycrypto500_13.html
한국어 : http://www.repo.kr/2016/12/seccon-2016-online-ctf-binarycrypto500.html
日本語: </span></span>http://www.repo.kr/2016/12/seccon-2016-online-ctf-binarycrypto500_30.html

Original writeup (http://www.repo.kr/2016/12/seccon-2016-online-ctf-binarycrypto500_13.html).