{"version":"1.0","width":"100%","author_name":"hamayanhamayan","image_url":null,"blog_title":"\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093","author_url":"https://blog.hatena.ne.jp/hamayanhamayan/","blog_url":"https://blog.hamayanhamayan.com/","provider_url":"https://hatena.blog","height":"190","description":"CTF\u306b\u304a\u3051\u308bCrypto\u5165\u9580\u3068\u307e\u3068\u3081\u306e1\u3064\u3067\u3059\u3002 Hash \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0 \u95a2\u9023\u30ef\u30fc\u30c9 Length Extension Attack Bcrypt Truncation \u81ea\u4f5c\u30cf\u30c3\u30b7\u30e5\u885d\u7a81\u554f\u984c \u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u7f72\u540d Hash \u4e00\u65b9\u5411\u30cf\u30c3\u30b7\u30e5\u95a2\u6570, \u30e1\u30c3\u30bb\u30fc\u30b8\u30c0\u30a4\u30b8\u30a7\u30b9\u30c8\u95a2\u6570\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u8981\u7d04\u95a2\u6570\u3001\u6697\u53f7\u7684\u30cf\u30c3\u30b7\u30e5\u95a2\u6570 \u6697\u53f7\u5b66\u7684\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\uff08RFC4270\u306b\u8a18\u8f09\u304c\u3042\u308b\uff09 \u7b2c\uff11\u539f\u50cf\u653b\u6483\u56f0\u96e3\u6027: \u30cf\u30c3\u30b7\u30e5\u5024H\u306b\u5bfe\u3057\u3066\u3001H=HASH(M)\u3068\u306a\u308b\u3088\u3046\u306a\u5165\u529bM\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u56f0\u96e3\u3002\u3064\u307e\u308a\u3001\u72d9\u3063\u305f\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u51fa\u529b\u3055\u305b\u308b\u5165\u529b\u3092\u4f5c\u308b\u3053\u3068\u304c\u56f0\u96e3 \u7b2c\uff12\u539f\u50cf\u653b\u6483\u56f0\u96e3\u6027: \u5165\u529b\u5024M1\u306b\u5bfe\u3057\u3066 HASH(M1)=HASH(M2)\u2026","published":"2025-11-26 23:39:22","url":"https://blog.hamayanhamayan.com/entry/2025/11/26/233922","title":"CTF\u306eCrypto\u306b\u304a\u3051\u308b\u30cf\u30c3\u30b7\u30e5\u307e\u3068\u3081","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.hamayanhamayan.com%2Fentry%2F2025%2F11%2F26%2F233922\" title=\"CTF\u306eCrypto\u306b\u304a\u3051\u308b\u30cf\u30c3\u30b7\u30e5\u307e\u3068\u3081 - \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>","type":"rich","categories":["Security"]}