{"id":693,"date":"2025-10-24T09:58:45","date_gmt":"2025-10-24T01:58:45","guid":{"rendered":"https:\/\/www.youvii.site\/?p=693"},"modified":"2025-10-24T09:58:45","modified_gmt":"2025-10-24T01:58:45","slug":"0007-kaisadadidezhengtaozhilu","status":"publish","type":"post","link":"https:\/\/www.youvii.site\/index.php\/archives\/0007-kaisadadidezhengtaozhilu","title":{"rendered":"0007-\u51ef\u6492\u5927\u5e1d\u7684\u5f81\u8ba8\u4e4b\u8def"},"content":{"rendered":"<h1>0007-\u51ef\u6492\u5927\u5e1d\u7684\u5f81\u8ba8\u4e4b\u8def<\/h1>\n<p>\u89e3\u538b\u6253\u5f00\u6587\u4ef6\u770b\u5230\u6587\u4ef6\u540d\u50cf\u4e71\u7801<\/p>\n<p>\u4e14\u6253\u5f00\u6587\u4ef6\u53d1\u73b0\u4e5f\u662f\u770b\u4e0d\u61c2\u4ee3\u7801<\/p>\n<p><img loading="lazy" decoding="async" decoding=\"async\"  src=\"https:\/\/www.youvii.site\/wp-content\/themes\/lolimeow-lolimeowV13.13\/assets\/images\/loading.gif\" data-src=\".\/img\/Esam88mW6_c7BPcn\/1747305684835-400f10c6-c647-4978-8050-2e25383e99ee-759820.png\" class=\"lazy\" loading=\"lazy\" alt=\"1747305684835-400f10c6-c647-4978-8050-2e25383e99ee.png\" \/><img loading="lazy" decoding="async" decoding=\"async\"  src=\"https:\/\/www.youvii.site\/wp-content\/themes\/lolimeow-lolimeowV13.13\/assets\/images\/loading.gif\" data-src=\"https:\/\/cdn.picui.cn\/vip\/2025\/10\/24\/68fadbbb6c7ec.png\" class=\"lazy\" loading=\"lazy\" alt=\"1747305696906-36d2ce50-9123-4745-8858-8fb634c3517d.png\" \/><\/p>\n<p>\u7ed3\u5408\u9898\u76ee\u540d\u79f0\u770b\u5e94\u8be5\u662f\u8981\u7528\u51ef\u6492\u5bc6\u7801<\/p>\n<p>\u76f4\u63a5\u4e0a\u968f\u6ce2\u9010\u6d41\u5de5\u5177<\/p>\n<p><img loading="lazy" decoding="async" decoding=\"async\"  src=\"https:\/\/www.youvii.site\/wp-content\/themes\/lolimeow-lolimeowV13.13\/assets\/images\/loading.gif\" data-src=\"https:\/\/cdn.picui.cn\/vip\/2025\/10\/24\/68fadbbd6c9ec.png\" class=\"lazy\" loading=\"lazy\" alt=\"1747305907572-2eecc6ce-9d40-4cdb-8402-424e97a627da.png\" \/><\/p>\n<h3>\u51ef\u6492\u5bc6\u7801\u7684\u8be6\u7ec6\u89e3\u91ca<\/h3>\n<p>\u51ef\u6492\u5bc6\u7801\uff08Caesar Cipher\uff09\u662f\u4e00\u79cd\u975e\u5e38\u53e4\u8001\u7684\u52a0\u5bc6\u6280\u672f\uff0c\u5b83\u7684\u5386\u53f2\u53ef\u4ee5\u8ffd\u6eaf\u5230\u53e4\u7f57\u9a6c\u65f6\u671f\u3002\u8fd9\u4e2a\u52a0\u5bc6\u65b9\u6cd5\u5f97\u540d\u4e8e\u7f57\u9a6c\u5e1d\u56fd\u7684\u5c06\u519b\u548c\u7687\u5e1d\u5c24\u5229\u4e4c\u65af\u00b7\u51ef\u6492\uff08Julius Caesar\uff09\uff0c\u636e\u8bf4\u4ed6\u5728\u901a\u4fe1\u4e2d\u4f7f\u7528\u4e86\u8fd9\u79cd\u65b9\u6cd5\u6765\u4fdd\u62a4\u654f\u611f\u4fe1\u606f\u3002<\/p>\n<hr \/>\n<h4>1. <strong>\u57fa\u672c\u539f\u7406<\/strong><\/h4>\n<p>\u51ef\u6492\u5bc6\u7801\u662f\u4e00\u79cd<strong>\u66ff\u6362\u5f0f\u52a0\u5bc6<\/strong>\u7b97\u6cd5\uff0c\u5b83\u901a\u8fc7\u5c06\u660e\u6587\u4e2d\u7684\u6bcf\u4e2a\u5b57\u6bcd\u6309\u7167\u5b57\u6bcd\u8868\u987a\u5e8f\u5411\u53f3\u6216\u5411\u5de6\u79fb\u52a8\u56fa\u5b9a\u7684\u4f4d\u6570\u6765\u751f\u6210\u5bc6\u6587\u3002\u8fd9\u79cd\u56fa\u5b9a\u7684\u4f4d\u79fb\u503c\u79f0\u4e3a<strong>\u5bc6\u94a5<\/strong>\uff08Key\uff09\u3002\u89e3\u5bc6\u65f6\uff0c\u53ea\u9700\u5c06\u5bc6\u6587\u4e2d\u7684\u6bcf\u4e2a\u5b57\u6bcd\u53cd\u5411\u79fb\u52a8\u76f8\u540c\u7684\u4f4d\u6570\u5373\u53ef\u6062\u590d\u539f\u59cb\u7684\u660e\u6587\u3002<br \/>\n\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u660e\u6587\uff1a<code>HELLO<\/code><\/li>\n<li>\u5bc6\u94a5\uff1a3\uff08\u5411\u53f3\u79fb\u52a83\u4f4d\uff09<\/li>\n<li>\u52a0\u5bc6\u8fc7\u7a0b\uff1a\n<ul>\n<li>H \u2192 K  <\/li>\n<li>E \u2192 H  <\/li>\n<li>L \u2192 O  <\/li>\n<li>L \u2192 O  <\/li>\n<li>O \u2192 R<\/li>\n<\/ul>\n<\/li>\n<li>\u5bc6\u6587\uff1a<code>KHOOR<\/code><\/li>\n<\/ul>\n<hr \/>\n<h4>2. <strong>\u6570\u5b66\u8868\u793a<\/strong><\/h4>\n<p>\u51ef\u6492\u5bc6\u7801\u53ef\u4ee5\u7528\u6570\u5b66\u516c\u5f0f\u6765\u8868\u793a\u3002\u5047\u8bbe\u5b57\u6bcd\u8868\u4e2d\u7684\u6bcf\u4e2a\u5b57\u6bcd\u5bf9\u5e94\u4e00\u4e2a\u6574\u6570\uff08\u5982A=0, B=1, &#8230;, Z=25\uff09\uff0c\u5219\u52a0\u5bc6\u548c\u89e3\u5bc6\u7684\u8fc7\u7a0b\u53ef\u4ee5\u8868\u793a\u4e3a\u4ee5\u4e0b\u516c\u5f0f\uff1a<\/p>\n<ul>\n<li><strong>\u52a0\u5bc6\u516c\u5f0f<\/strong>\uff1a<br \/>\n[<br \/>\nC = (P + K) mod 26<br \/>\n]<br \/>\n\u5176\u4e2d\uff0c( P ) \u662f\u660e\u6587\u5b57\u6bcd\u5bf9\u5e94\u7684\u6570\u5b57\uff0c( K ) \u662f\u5bc6\u94a5\uff08\u4f4d\u79fb\u91cf\uff09\uff0c( C ) \u662f\u5bc6\u6587\u5b57\u6bcd\u5bf9\u5e94\u7684\u6570\u5b57\u3002<\/li>\n<li><strong>\u89e3\u5bc6\u516c\u5f0f<\/strong>\uff1a<br \/>\n[<br \/>\nP = (C &#8211; K) mod 26<br \/>\n]<br \/>\n\u5176\u4e2d\uff0c( C ) \u662f\u5bc6\u6587\u5b57\u6bcd\u5bf9\u5e94\u7684\u6570\u5b57\uff0c( K ) \u662f\u5bc6\u94a5\uff0c( P ) \u662f\u660e\u6587\u5b57\u6bcd\u5bf9\u5e94\u7684\u6570\u5b57\u3002<br \/>\n\u4f8b\u5982\uff0c\u5bf9\u4e8e\u5b57\u6bcdH\uff08\u5bf9\u5e94\u6570\u5b577\uff09\uff0c\u5bc6\u94a5\u4e3a3\uff1a<\/li>\n<li>\u52a0\u5bc6\uff1a( C = (7 + 3) mod 26 = 10 )\uff0c\u5bf9\u5e94\u7684\u5b57\u6bcd\u662fK\u3002<\/li>\n<li>\u89e3\u5bc6\uff1a( P = (10 &#8211; 3) mod 26 = 7 )\uff0c\u5bf9\u5e94\u7684\u5b57\u6bcd\u662fH\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>3. <strong>\u5b9e\u73b0\u6b65\u9aa4<\/strong><\/h4>\n<h5>\uff081\uff09\u52a0\u5bc6\u8fc7\u7a0b<\/h5>\n<ol>\n<li>\u5c06\u660e\u6587\u4e2d\u7684\u6bcf\u4e2a\u5b57\u6bcd\u8f6c\u6362\u4e3a\u5bf9\u5e94\u7684\u6570\u5b57\uff08A=0, B=1, &#8230;, Z=25\uff09\u3002<\/li>\n<li>\u4f7f\u7528\u52a0\u5bc6\u516c\u5f0f ( C = (P + K) mod 26 ) \u8ba1\u7b97\u6bcf\u4e2a\u5b57\u6bcd\u7684\u65b0\u4f4d\u7f6e\u3002<\/li>\n<li>\u5c06\u8ba1\u7b97\u7ed3\u679c\u8f6c\u6362\u56de\u5b57\u6bcd\uff0c\u5f97\u5230\u5bc6\u6587\u3002<\/li>\n<\/ol>\n<h5>\uff082\uff09\u89e3\u5bc6\u8fc7\u7a0b<\/h5>\n<ol>\n<li>\u5c06\u5bc6\u6587\u4e2d\u7684\u6bcf\u4e2a\u5b57\u6bcd\u8f6c\u6362\u4e3a\u5bf9\u5e94\u7684\u6570\u5b57\u3002<\/li>\n<li>\u4f7f\u7528\u89e3\u5bc6\u516c\u5f0f ( P = (C &#8211; K) mod 26 ) \u8ba1\u7b97\u6bcf\u4e2a\u5b57\u6bcd\u7684\u539f\u59cb\u4f4d\u7f6e\u3002<\/li>\n<li>\u5c06\u8ba1\u7b97\u7ed3\u679c\u8f6c\u6362\u56de\u5b57\u6bcd\uff0c\u5f97\u5230\u660e\u6587\u3002<\/li>\n<\/ol>\n<hr \/>\n<h4>4. <strong>\u793a\u4f8b\u4ee3\u7801<\/strong><\/h4>\n<p>\u4ee5\u4e0b\u662f\u7528Python\u5b9e\u73b0\u51ef\u6492\u5bc6\u7801\u52a0\u5bc6\u548c\u89e3\u5bc6\u7684\u7b80\u5355\u4ee3\u7801\uff1a<\/p>\n<pre class=\"prettyprint linenums\" ><code class=\"language-python\">def caesar_encrypt(plaintext, key):\n    ciphertext = \"\"\n    for char in plaintext.upper():\n        if char.isalpha():  # \u53ea\u5904\u7406\u5b57\u6bcd\n            shifted = ((ord(char) - ord('A') + key) % 26) + ord('A')\n            ciphertext += chr(shifted)\n        else:\n            ciphertext += char  # \u975e\u5b57\u6bcd\u5b57\u7b26\u4fdd\u6301\u4e0d\u53d8\n    return ciphertext\ndef caesar_decrypt(ciphertext, key):\n    plaintext = \"\"\n    for char in ciphertext.upper():\n        if char.isalpha():\n            shifted = ((ord(char) - ord('A') - key) % 26) + ord('A')\n            plaintext += chr(shifted)\n        else:\n            plaintext += char\n    return plaintext\n# \u793a\u4f8b\nplaintext = \"HELLO WORLD\"\nkey = 3\nciphertext = caesar_encrypt(plaintext, key)\nprint(\"\u52a0\u5bc6\u540e\u7684\u5bc6\u6587\uff1a\", ciphertext)\ndecrypted_text = caesar_decrypt(ciphertext, key)\nprint(\"\u89e3\u5bc6\u540e\u7684\u660e\u6587\uff1a\", decrypted_text)<\/code><\/pre>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n<pre class=\"prettyprint linenums\" ><code class=\"language-plain\">\u52a0\u5bc6\u540e\u7684\u5bc6\u6587\uff1a KHOOR ZRUOG\n\u89e3\u5bc6\u540e\u7684\u660e\u6587\uff1a HELLO WORLD<\/code><\/pre>\n<hr \/>\n<h4>5. <strong>\u4f18\u7f3a\u70b9<\/strong><\/h4>\n<h5>\uff081\uff09\u4f18\u70b9<\/h5>\n<ul>\n<li>\u5b9e\u73b0\u7b80\u5355\uff1a\u53ea\u9700\u8981\u5bf9\u5b57\u6bcd\u8868\u8fdb\u884c\u7b80\u5355\u7684\u4f4d\u79fb\u64cd\u4f5c\u3002<\/li>\n<li>\u8ba1\u7b97\u9ad8\u6548\uff1a\u9002\u7528\u4e8e\u624b\u5de5\u52a0\u5bc6\u6216\u4f4e\u590d\u6742\u5ea6\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n<h5>\uff082\uff09\u7f3a\u70b9<\/h5>\n<ul>\n<li>\u5b89\u5168\u6027\u6781\u4f4e\uff1a\u7531\u4e8e\u5bc6\u94a5\u7a7a\u95f4\u5f88\u5c0f\uff08\u6700\u591a\u53ea\u670925\u79cd\u53ef\u80fd\u7684\u4f4d\u79fb\u503c\uff09\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u7a77\u4e3e\u6cd5\uff08Brute Force\uff09\u8f7b\u6613\u7834\u89e3\u3002<\/li>\n<li>\u4e0d\u9002\u5408\u73b0\u4ee3\u52a0\u5bc6\u9700\u6c42\uff1a\u51ef\u6492\u5bc6\u7801\u65e0\u6cd5\u62b5\u6297\u4efb\u4f55\u590d\u6742\u7684\u5bc6\u7801\u5206\u6790\u653b\u51fb\u3002<\/li>\n<\/ul>\n<hr \/>\n<h4>6. <strong>\u6539\u8fdb\u4e0e\u53d8\u4f53<\/strong><\/h4>\n<p>\u5c3d\u7ba1\u51ef\u6492\u5bc6\u7801\u672c\u8eab\u5df2\u7ecf\u8fc7\u65f6\uff0c\u4f46\u5b83\u662f\u8bb8\u591a\u73b0\u4ee3\u52a0\u5bc6\u7b97\u6cd5\u7684\u7075\u611f\u6765\u6e90\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u6539\u8fdb\u65b9\u5411\uff1a<\/p>\n<ol>\n<li><strong>\u591a\u8868\u66ff\u6362<\/strong>\uff1a\u5982\u7ef4\u5409\u5c3c\u4e9a\u5bc6\u7801\uff08Vigen\u00e8re Cipher\uff09\uff0c\u4f7f\u7528\u591a\u4e2a\u51ef\u6492\u5bc6\u7801\u7ec4\u5408\u52a0\u5bc6\u3002<\/li>\n<li><strong>\u52a8\u6001\u5bc6\u94a5<\/strong>\uff1a\u6839\u636e\u7279\u5b9a\u89c4\u5219\u52a8\u6001\u8c03\u6574\u6bcf\u6b21\u52a0\u5bc6\u7684\u4f4d\u79fb\u91cf\u3002<\/li>\n<li><strong>\u7ed3\u5408\u5176\u4ed6\u52a0\u5bc6\u6280\u672f<\/strong>\uff1a\u5c06\u51ef\u6492\u5bc6\u7801\u4e0e\u5176\u4ed6\u52a0\u5bc6\u7b97\u6cd5\uff08\u5982\u7f6e\u6362\u3001\u8f6c\u7f6e\u7b49\uff09\u7ed3\u5408\u4f7f\u7528\u3002<\/li>\n<\/ol>\n<hr \/>\n<p><strong>\u51ef\u6492\u5bc6\u7801\u7684\u6838\u5fc3\u662f\u5bf9\u5b57\u6bcd\u8868\u8fdb\u884c\u56fa\u5b9a\u4f4d\u79fb\u7684\u66ff\u6362\u64cd\u4f5c\uff0c\u5176\u6570\u5b66\u672c\u8d28\u662f\u6a21\u8fd0\u7b97\uff0c\u4f46\u7531\u4e8e\u5bc6\u94a5\u7a7a\u95f4\u6709\u9650\uff0c\u5b89\u5168\u6027\u8f83\u4f4e\u3002<\/strong><\/p>\n<blockquote>\n<p>\u66f4\u65b0: 2025-05-15 18:49:39<br \/>\n\u539f\u6587: <a href=\"https:\/\/www.yuque.com\/yuhui.net\/network\/etil4a76r4bzd8lf\">https:\/\/www.yuque.com\/yuhui.net\/network\/etil4a76r4bzd8lf<\/a><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>0007-\u51ef\u6492\u5927\u5e1d\u7684\u5f81\u8ba8\u4e4b\u8def \u89e3\u538b\u6253\u5f00\u6587\u4ef6\u770b\u5230\u6587\u4ef6\u540d\u50cf\u4e71\u7801 \u4e14\u6253\u5f00\u6587\u4ef6\u53d1\u73b0\u4e5f\u662f\u770b\u4e0d\u61c2\u4ee3\u7801 \u7ed3\u5408\u9898\u76ee\u540d\u79f0\u770b\u5e94\u8be5\u662f\u8981\u7528\u51ef\u6492\u5bc6\u7801 \u76f4\u63a5\u4e0a\u968f\u6ce2\u9010\u6d41\u5de5\u5177 \u51ef\u6492\u5bc6\u7801\u7684\u8be6\u7ec6\u89e3\u91ca \u51ef\u6492\u5bc6\u7801\uff08Caesar Cipher\uff09\u662f\u4e00\u79cd\u975e\u5e38\u53e4\u8001\u7684\u52a0\u5bc6\u6280\u672f\uff0c\u5b83\u7684\u5386\u53f2\u53ef\u4ee5\u8ffd\u6eaf\u5230\u53e4\u7f57\u9a6c\u65f6\u671f\u3002\u8fd9\u4e2a\u52a0\u5bc6\u65b9\u6cd5\u5f97\u540d\u4e8e\u7f57\u9a6c\u5e1d\u56fd\u7684\u5c06\u519b\u548c\u7687\u5e1d\u5c24\u5229\u4e4c\u65af\u00b7\u51ef\u6492\uff08Julius Caesar\uff09\uff0c\u636e\u8bf4\u4ed6\u5728\u901a\u4fe1\u4e2d\u4f7f\u7528\u4e86\u8fd9\u79cd\u65b9\u6cd5\u6765\u4fdd\u62a4\u654f\u611f\u4fe1\u606f\u3002 1. \u57fa\u672c\u539f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114,113,117],"tags":[43,44,57],"class_list":["post-693","post","type-post","status-publish","format-standard","hentry","category-crypto","category-ctf","category-qingshaonianctf","tag-43","tag-44","tag-python"],"_links":{"self":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/posts\/693","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/comments?post=693"}],"version-history":[{"count":0,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/posts\/693\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/media?parent=693"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/categories?post=693"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.youvii.site\/index.php\/wp-json\/wp\/v2\/tags?post=693"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}