{"provider_name":"Hatena Blog","version":"1.0","type":"rich","categories":["picoCTF","CTF"],"blog_url":"https://tech.kusuwada.com/","provider_url":"https://hatena.blog","blog_title":"\u597d\u5947\u5fc3\u306e\u8db3\u8de1","author_name":"kusuwada","width":"100%","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.kusuwada.com%2Fentry%2F2022%2F04%2F06%2F134939\" title=\"picoCTF2022 [Cryptography] writeup - \u597d\u5947\u5fc3\u306e\u8db3\u8de1\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/k/kusuwada/20220404/20220404142614.png","description":"2022\u5e743\u670815\u65e5~3\u670829\u65e5\u306b\u958b\u50ac\u3055\u308c\u305f\u4e2d\u9ad8\u751f\u5411\u3051\u306eCTF\u5927\u4f1a\u3001picoCTF\u306e[Cryptography]\u5206\u91ce\u306ewriteup\u3067\u3059\u3002 \u305d\u306e\u4ed6\u306e\u30b8\u30e3\u30f3\u30eb\u306b\u3064\u3044\u3066\u306f\u3053\u3061\u3089\u3092\u53c2\u7167\u3002 tech.kusuwada.com basic-mod1 We found this weird message being passed around on the servers, we think we have a working decrpytion scheme. Take each number mod 37 and map it to the following character set: 0-2\u2026","title":"picoCTF2022 [Cryptography] writeup","author_url":"https://blog.hatena.ne.jp/kusuwada/","url":"https://tech.kusuwada.com/entry/2022/04/06/134939","published":"2022-04-06 13:49:39"}