{"version":"1.0","width":"100%","author_url":"https://blog.hatena.ne.jp/smoking186/","categories":["\u65ad\u7247\u90e8","crypt"],"provider_url":"https://hatena.blog","url":"https://186.hatenablog.com/entry/20060507/1147012431","author_name":"smoking186","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2F186.hatenablog.com%2Fentry%2F20060507%2F1147012431\" title=\" \u30e1\u30e2 - 186 @ hatenablog\" 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":null,"type":"rich","height":"190","description":"collision-resitant\u304b\u3089\u3058\u3083\u306a\u3044. \u5143\u8ad6\u6587\u3067\u306f, \u3082\u3063\u3068\u5f31\u3044\u6027\u8cea\u304b\u3089\u793a\u3057\u3066\u3044\u308b. HMAC-MD5\u3068\u3044\u3046\u304b, \u5143\u306e\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306b\u885d\u7a81\u8010\u6027\u304c\u7121\u3044\u5834\u5408\u306eHMAC\u306e\u5b89\u5168\u6027. HMAC\u306eRFC\u306e\u90a6\u8a33\u3092\u898b\u3064\u3051\u305f\u306e\u3067, \u305d\u308c\u3060\u3051\u66f8\u3044\u3066\u304a\u304f. http://www.ipa.go.jp/security/rfc/RFC2104JA.html\u5143\u8ad6\u6587\u306e\u8ad6\u6cd5\u3092\u4f7f\u3063\u3066\u3092MD5\u3092\u4f7f\u3063\u3066\u69cb\u6210\u3057\u305f\u5834\u5408\u306b, HMAC-MD5\u304c\u6697\u53f7\u5b66\u7684\u306b\u8a3c\u660e\u53ef\u80fd\u5b89\u5168\u6027\u3092\u6301\u3064\u304b\u3069\u3046\u304b\u5206\u304b\u3093\u306a\u3044\u3068\u3044\u3046\u306e\u304c\u6b63\u76f4\u306e\u3068\u3053\u308d\u306e\u3088\u3046\u306a. \u5143\u8ad6\u6587\u306e\u5927\u96d1\u628a\u306a\u8aac\u660e. MD5\u3084SHA-1\u306f, 1\u3092\u5185\u90e8\u306b\u6301\u3063\u3066\u3044\u308b. MD5\u3084SHA-1\u306f, \u95a2\u6570\u3068\u3057\u2026","blog_title":"186 @ hatenablog","blog_url":"https://186.hatenablog.com/","title":" \u30e1\u30e2","published":"2006-05-07 23:33:51"}