{"blog_url":"https://blog.hamayanhamayan.com/","description":"\u5fa9\u7fd2\u3057\u305f\u306e\u3067\u3001\u307e\u3068\u3081\u305f\u3002 CTF\u306e\u5fa9\u7fd2\u3092\u3059\u308b\u3068\u6bce\u56de\u5b66\u3073\u304c\u3042\u308b\u306e\u3067\u3001\u9762\u767d\u3044\u3002 coffee_break \u89e3\u6cd5 flag\u3092\u300c\u72ec\u81ea\u306e\u6697\u53f7\u5316\u2192AES\u2192Base64\u300d\u3057\u305f\u3082\u306e\u304c\u4e0e\u3048\u3089\u308c\u308b\u306e\u3067\u3001\u30c7\u30b3\u30fc\u30c9\u3059\u308b Base64\u306f\u3084\u308b\u3060\u3051 AES\u3082\u30ad\u30fc\u306f\u308f\u304b\u3063\u3066\u3044\u308b\u306e\u3067\u3084\u308b\u3060\u3051 \u72ec\u81ea\u306e\u6697\u53f7\u5316\u306b\u5bfe\u3057\u3066\u9811\u5f35\u3063\u3066\u30c7\u30b3\u30fc\u30c0\u30fc\u3092\u4f5c\u308b\u3068\u7b54\u3048 [1]\uff5e[4]\u306f\u65b9\u91dd\u4e00\u7dd2\u3002[3]\u304c\u308f\u304b\u308a\u6613\u304b\u3063\u305f [5]\u3067\u306f\u3001\u6587\u5b57\u3054\u3068\u306b\u72ec\u7acb\u3057\u3066\u5909\u63db\u3057\u3066\u3044\u308b\u306e\u3067\u30011\u6587\u5b57\u305a\u3064\u7dcf\u5f53\u308a\u3057\u3066\u3044\u308b\u3002\u306a\u308b\u307b\u3069\u3002\u6c4e\u7528\u7684\u3067\u8ce2\u3044\u30c6\u30af \u53c2\u8003 [1] https://qiita.com/FeLvi/items/2fe591a816899d7f901b [2] https:\u2026","height":"190","author_name":"hamayanhamayan","version":"1.0","width":"100%","image_url":null,"categories":["Security"],"type":"rich","author_url":"https://blog.hatena.ne.jp/hamayanhamayan/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.hamayanhamayan.com%2Fentry%2F2019%2F10%2F22%2F175539\" title=\"SECCON 2019 Online CTF Quals - Crypto Writeups - \u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"SECCON 2019 Online CTF Quals - Crypto Writeups","url":"https://blog.hamayanhamayan.com/entry/2019/10/22/175539","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","blog_title":"\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093","published":"2019-10-22 17:55:39"}