{"id":481,"date":"2012-09-20T14:50:19","date_gmt":"2012-09-20T06:50:19","guid":{"rendered":"http:\/\/blog.jianguoyun.com\/?p=481"},"modified":"2012-10-09T11:26:14","modified_gmt":"2012-10-09T03:26:14","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88%e5%ba%94%e8%af%a5%e6%94%be%e5%bc%83%e6%88%96%e5%87%8f%e5%b0%91%e4%bd%bf%e7%94%a8md5","status":"publish","type":"post","link":"https:\/\/blog.jianguoyun.com\/?p=481","title":{"rendered":"\u4e3a\u4ec0\u4e48\u5e94\u8be5\u653e\u5f03\u6216\u51cf\u5c11\u4f7f\u7528MD5"},"content":{"rendered":"<p><a href=\"http:\/\/blog.jianguoyun.com\/wp-content\/uploads\/2012\/09\/md5-crack2.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-510\" title=\"md5-crack\" src=\"http:\/\/blog.jianguoyun.com\/wp-content\/uploads\/2012\/09\/md5-crack2.png\" alt=\"\" width=\"580\" height=\"128\" \/><\/a><a href=\"http:\/\/baike.baidu.com\/view\/7636.htm\" target=\"_blank\">MD5<\/a>\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5355\u5411\u54c8\u5e0c\u7b97\u6cd5\u3002\u5b83\u88ab\u5e7f\u6cdb\u7528\u4e8e\u4ee5\u4e0b\u51e0\u4e2a\u7528\u9014\uff1a<\/p>\n<ol>\n<li><strong>\u68c0\u67e5\u6570\u636e\u662f\u5426\u4e00\u81f4<\/strong>\u3002\u5c06\u4e24\u5730\u5b58\u50a8\u7684\u6570\u636e\u8fdb\u884c\u54c8\u5e0c\uff0c\u6bd4\u8f83\u7ed3\u679c\uff0c\u5982\u679c\u7ed3\u679c\u4e00\u81f4\u5c31\u65e0\u9700\u518d\u8fdb\u884c\u6570\u636e\u6bd4\u5bf9\u3002\u8fd9\u662f\u5229\u7528\u4e86\u5176\u201c\u62b5\u6297\u51b2\u7a81\u201d(collision- resistant)\u7684\u80fd\u529b\uff0c\u4e24\u4e2a\u4e0d\u540c\u7684\u6570\u636e\uff0c\u5176\u54c8\u5e0c\u503c\u53ea\u6709\u5f88\u5c0f\u7684\u51e0\u7387\u4e00\u81f4\u3002\u76f8\u5f53\u591a\u6570\u636e\u670d\u52a1\uff0c\u5c24\u5176\u662f\u7f51\u76d8\u670d\u52a1\uff0c\u5229\u7528\u7c7b\u4f3c\u7684\u505a\u6cd5\u6765\u68c0\u6d4b\u91cd\u590d\u6570\u636e\uff0c\u907f\u514d\u91cd\u590d\u4e0a\u4f20\u3002<\/li>\n<li><strong>\u5b58\u50a8\u7528\u6237\u5bc6\u7801<\/strong>\u3002\u5c06\u5bc6\u7801\u54c8\u5e0c\u540e\u7684\u7ed3\u679c\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u4ee5\u505a\u5bc6\u7801\u5339\u914d\u3002\u8fd9\u662f\u5229\u7528\u4e86\u5176\u505a\u4e3a\u5355\u5411\u54c8\u5e0c\u7684\u7279\u70b9\uff0c\u4ece\u8ba1\u7b97\u540e\u7684\u54c8\u5e0c\u503c\u4e0d\u80fd\u5f97\u5230\u5bc6\u7801\u3002<\/li>\n<li> <strong>\u6821\u9a8c\u6570\u636e\u6b63\u786e\u6027<\/strong>\u3002\u5c06\u6570\u636e\u548c\u6570\u636e\u54c8\u5e0c\u540e\u7684\u7ed3\u679c\u4e00\u5e76\u4f20\u8f93\uff0c\u7528\u4e8e\u68c0\u9a8c\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u6570\u636e\u662f\u5426\u6709\u635f\u574f\u3002\u8fd9\u662f\u5229\u7528\u4e86\u5f88\u96be\u627e\u5230\u4e24\u4e2a\u4e0d\u540c\u7684\u6570\u636e\uff0c\u5176\u54c8\u5e0c\u7ed3\u679c\u4e00\u81f4\u7684\u7279\u70b9\u3002<\/li>\n<\/ol>\n<p>\u4e0b\u9762\u6211\u4eec\u5c06\u8bf4\u660e\u4e3a\u4ec0\u4e48\u5bf9\u4e8e\u4e0a\u9762\u4e09\u79cd\u7528\u9014, MD5\u90fd\u4e0d\u9002\u7528\u3002<!--more--><\/p>\n<p>\u7b2c\u4e00\u4e2a\u7528\u9014\u5c24\u5176\u53ef\u6015\u3002\u8fd9\u4e2a\u7528\u9014\u7684\u6700\u5927\u7684\u95ee\u9898\u662f\uff0cMD5\u5728\u73b0\u5b9e\u4e2d\u5df2\u7ecf\u88ab\u53d1\u73b0\u6709\u76f8\u5f53\u591a\u7684\u6570\u636e\u90fd\u53ef\u80fd\u5bfc\u81f4\u51b2\u7a81\u3002<a href=\"http:\/\/marc-stevens.nl\/research\/md5-1block-collision\/md5-1block-collision.pdf\">\u4e3e\u4f8b\u800c\u8a00<\/a>\uff0c\u5982\u4e0b\u4e24\u6bb5\u6570\u636e\u7684MD5\u54c8\u5e0c\u503c\u5c31\u662f\u5b8c\u5168\u4e00\u6837\u7684\u3002<\/p>\n<pre><code>                   \u6570\u636e 1  \r\n\r\n    4d c9 68 ff 0e e3 5c 20 95 72 d4 77 7b 72 15 87\r\n    d3 6f a7 b2 1b dc 56 b7 4a 3d c0 78 3e 7b 95 18\r\n    af bf a2 <strong>00<\/strong> a8 28 4b f3 6e 8e 4b 55 b3 5f 42 75\r\n    93 d8 49 67 6d a0 d1 <em><strong>55<\/strong><\/em> 5d 83 60 fb 5f 07 fe a2\r\n\r\n                   \u6570\u636e 2\r\n\r\n    4d c9 68 ff 0e e3 5c 20 95 72 d4 77 7b 72 15 87\r\n    d3 6f a7 b2 1b dc 56 b7 4a 3d c0 78 3e 7b 95 18\r\n    af bf a2 <strong>02<\/strong> a8 28 4b f3 6e 8e 4b 55 b3 5f 42 75\r\n    93 d8 49 67 6d a0 d1 <em><strong>d5<\/strong><\/em> 5d 83 60 fb 5f 07 fe a2\r\n\r\n                 \u8f93\u51fa\u76f8\u540c\u7684MD5 \u54c8\u5e0c\r\n\r\n           008ee33a9d58b51cfeb425b0959121c9<\/code><\/pre>\n<p>\u8fd9\u610f\u5473\u7740\uff0c\u5982\u679c\u7528\u6237\u63d0\u4f9b\u6570\u636e 1\uff0c\u670d\u52a1\u5668\u5df2\u7ecf\u5b58\u50a8\u6570\u636e 2\u3002\u901a\u8fc7\u7b80\u5355\u7684MD5\u54c8\u5e0c\u65b9\u5f0f\u68c0\u67e5\u91cd\u590d\uff0c\u670d\u52a1\u5668\u4e0a\u4e3a\u7528\u6237\u4fdd\u5b58\u7684\u6570\u636e\u5c31\u662f2\u3002 \u63a5\u4e0b\u6765\u53d1\u751f\u7684\u4e8b\u60c5\u5927\u5bb6\u90fd\u77e5\u9053\u4e86\uff0c\u5c31\u662f\u7528\u6237\u6570\u636e\u4e22\u4e86\uff01<\/p>\n<p>\u7b2c\u4e8c\u4e2a\u7528\u9014\u5f88\u5bb9\u6613\u906d\u5230rainbow table\u653b\u51fb\uff0c\u548c\u660e\u6587\u5b58\u50a8\u5bc6\u7801\u7684\u5b9e\u8d28\u533a\u522b\u4e0d\u5927\u3002\u66f4\u8be6\u7ec6\u7684\u5206\u6790\u53ef\u4ee5\u5bdf\u770b<a href=\"http:\/\/blog.jianguoyun.com\/?p=438\">\u8fd9\u7bc7\u6587\u7ae0<\/a>\u3002<\/p>\n<p>\u7b2c\u4e09\u4e2a\u7528\u9014\u91cc\u4e00\u822c\u4f1a\u5728\u9700\u8981\u54c8\u5e0c\u7684\u6570\u636e\u4e2d\u6df7\u5165\u67d0\u4e9b\u79d8\u5bc6\uff0c\u4e5f\u5c31\u662f\u8ba1\u7b97\u516c\u5f0f\u4e3amd5(secret key + data)\u3002 \u4f46\u8fd9\u6837\u5e76\u4e0d\u9002\u5408\u7528\u4e8e\u9a8c\u8bc1\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002\u8fd9\u662f\u56e0\u4e3a\uff0c\u4ece\u7406\u8bba\u4e0a\u4e0a\u6765\u8bf4\uff0c\u5982\u679c\u77e5\u9053md5(secret key +X)\uff0c\u5373\u4f7f\u4e0d\u77e5\u9053secret key\u7684\u5185\u5bb9, \u4ecd\u7136\u53ef\u80fd\u901a\u8fc7\u5bf9X\u7684\u5206\u6790\uff0c\u8ba1\u7b97\u5f97\u5230md5(secret key +Y\uff09\uff0c\u4ece\u800c\u5c06X\u6210\u529f\u7684\u66ff\u6362\u6210Y\uff0c\u5bfc\u81f4\u63a5\u6536\u65b9\u4ecd\u7136\u8ba4\u4e3a\u6570\u636e\u662f\u6b63\u786e\u7684\u3002<\/p>\n<p><strong>\u8865\u5145<\/strong>\uff1a\u6211\u4eec\u5728<a href=\"http:\/\/blog.jianguoyun.com\/?p=537\">\u53e6\u5916\u4e00\u7bc7\u6587\u7ae0<\/a>\u91cc\u9762\u8bb2\u8ff0\u4e86\u5e94\u5bf9\u8fd9\u4e9b\u95ee\u9898\u7684\u65b9\u6cd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MD5\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5355\u5411\u54c8\u5e0c\u7b97\u6cd5\u3002\u5b83\u88ab\u5e7f\u6cdb\u7528\u4e8e\u4ee5\u4e0b\u51e0\u4e2a\u7528\u9014\uff1a \u68c0\u67e5\u6570\u636e\u662f\u5426\u4e00\u81f4\u3002\u5c06\u4e24\u5730\u5b58\u50a8\u7684\u6570\u636e\u8fdb\u884c\u54c8\u5e0c\uff0c\u6bd4\u8f83\u7ed3 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts\/481"}],"collection":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=481"}],"version-history":[{"count":16,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts\/481\/revisions"}],"predecessor-version":[{"id":508,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=\/wp\/v2\/posts\/481\/revisions\/508"}],"wp:attachment":[{"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jianguoyun.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}