{"id":120752,"date":"2026-11-01T09:08:36","date_gmt":"2026-11-01T01:08:36","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/120752.html"},"modified":"2026-11-01T09:08:36","modified_gmt":"2026-11-01T01:08:36","slug":"%e6%a0%85%e6%a0%8f%e5%af%86%e7%a0%81%ef%bc%88rail-fence-cipher%ef%bc%89%e8%af%a6%e8%a7%a3%ef%bc%9a%e4%bb%8e%e5%9b%b4%e6%a0%8f%e6%a6%82%e5%bf%b5%e5%88%b0%e8%87%aa%e5%8a%a8%e8%a7%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/120752.html","title":{"rendered":"\u6805\u680f\u5bc6\u7801\uff08Rail Fence Cipher\uff09\u8be6\u89e3\uff1a\u4ece\u56f4\u680f\u6982\u5ff5\u5230\u81ea\u52a8\u89e3\u7801"},"content":{"rendered":"

1. \u4ec0\u4e48\u662f\u201c\u56f4\u680f\u201d<\/h3>\n

\u6458\u8981：\u672c\u6587\u4ece\u201c\u56f4\u680f\u201d\u8fd9\u4e00\u62bd\u8c61\u6982\u5ff5\u51fa\u53d1，\u8bf4\u660e\u6805\u680f\u5bc6\u7801\u7684\u672c\u8d28\u662f\u201c\u5199\u5165\u987a\u5e8f \u2260 \u8bfb\u51fa\u987a\u5e8f\u201d\u3002\u56f4\u7ed5\u56f4\u680f\u5f62\u72b6\u4e0e\u8bfb\u51fa\u65b9\u5411\u4e24\u4e2a\u7279\u8d28，\u5206\u522b\u8bb2\u89e3\u666e\u901a\u6805\u680f（\u6309\u884c\u5199\u5165\u3001\u6309\u5217\u8bfb\u51fa）\u4e0e W \u578b\u6805\u680f（\u4e4b\u5b57\u5f62\u5199\u5165\u3001\u6309\u884c\u8bfb\u51fa）\u7684\u52a0\u5bc6\u539f\u7406\u4e0e\u89e3\u5bc6\u601d\u8def，\u5e76\u7528 Markdown \u8868\u683c\u4ece\u516d\u4e2a\u7ef4\u5ea6\u5bf9\u6bd4\u4e24\u8005\u3002\u968f\u540e\u7ed9\u51fa\u81ea\u52a8\u5c1d\u8bd5\u6240\u6709\u680f\u6570\u3001\u7528\u82f1\u6587\u8bc4\u5206\u6392\u5e8f\u7684\u5b8c\u6574 Python \u89e3\u7801\u811a\u672c\u4e0e\u8fd0\u884c\u793a\u4f8b，\u6700\u540e\u8bf4\u660e\u6805\u680f\u5bc6\u7801\u5c5e\u4e8e\u53e4\u5178\u5bc6\u7801\u4e2d\u7684\u7f6e\u6362\u5bc6\u7801，\u53ea\u6362\u4f4d\u7f6e\u4e0d\u6362\u5b57\u7b26，\u5bc6\u94a5\u7a7a\u95f4\u5c0f，\u4ec5\u9002\u5408\u6559\u5b66\u4e0e CTF \u5165\u95e8\u3002<\/p>\n

\u5728\u8bb2\u6805\u680f\u5bc6\u7801\u4e4b\u524d，\u5148\u7406\u89e3\u201c\u56f4\u680f\u201d\u8fd9\u4e2a\u6982\u5ff5\u672c\u8eab\u3002<\/p>\n

\u60f3\u8c61\u4f60\u624b\u91cc\u6709\u4e00\u4e32\u5b57\u7b26，\u9700\u8981\u628a\u5b83\u4eec\u6309\u67d0\u79cd\u89c4\u5219\u201c\u6446\u201d\u5230\u4e00\u4e2a\u770b\u4e0d\u89c1\u7684\u7f51\u683c\u91cc\u2014\u2014\u8fd9\u4e2a\u7f51\u683c\u5c31\u662f\u56f4\u680f\u3002\u56f4\u680f\u51b3\u5b9a\u4e86\u5b57\u7b26\u7684\u5199\u5165\u4f4d\u7f6e，\u800c\u89e3\u5bc6\u8981\u505a\u7684，\u5c31\u662f\u6839\u636e\u540c\u6837\u7684\u56f4\u680f\u89c4\u5219，\u628a\u5b57\u7b26\u6309\u53e6\u4e00\u79cd\u987a\u5e8f\u8bfb\u51fa\u6765\u3002<\/p>\n

\u6240\u4ee5\u6805\u680f\u5bc6\u7801\u7684\u672c\u8d28\u53ef\u4ee5\u6982\u62ec\u4e3a\u4e00\u53e5\u8bdd：<\/p>\n

\u5199\u5165\u987a\u5e8f \u2260 \u8bfb\u51fa\u987a\u5e8f\u3002<\/p>\n

\u53ea\u8981\u5199\u5165\u548c\u8bfb\u51fa\u7528\u7684\u662f\u4e24\u5957\u4e0d\u540c\u7684\u904d\u5386\u65b9\u5f0f，\u4fe1\u606f\u5c31\u88ab\u201c\u6253\u4e71\u201d\u4e86；\u800c\u53ea\u8981\u77e5\u9053\u56f4\u680f\u7684\u5f62\u72b6（\u680f\u6570\u3001\u8d70\u5411），\u5c31\u80fd\u628a\u987a\u5e8f\u8fd8\u539f\u56de\u6765\u3002<\/p>\n

\u5728\u56f4\u680f\u8fd9\u4e2a\u6846\u67b6\u4e0b，\u6709\u4e24\u4e2a\u5173\u952e\u7279\u8d28\u51b3\u5b9a\u4e86\u5bc6\u7801\u7684\u5177\u4f53\u5f62\u6001：<\/p>\n

  • \u56f4\u680f\u7684\u5f62\u72b6\u2014\u2014\u662f\u89c4\u6574\u7684\u77e9\u5f62，\u8fd8\u662f\u4e0a\u4e0b\u8d77\u4f0f\u7684\u6298\u7ebf？<\/li>\n
  • \u8bfb\u51fa\u7684\u65b9\u5411\u2014\u2014\u662f\u6309\u5217\u8bfb\u3001\u6309\u884c\u8bfb，\u8fd8\u662f\u6309\u5199\u5165\u8f68\u8ff9\u8bfb？<\/li>\n

    \u56f4\u7ed5\u8fd9\u4e24\u4e2a\u7279\u8d28，\u5c31\u884d\u751f\u51fa\u4e24\u79cd\u6700\u5e38\u89c1\u7684\u6805\u680f\u5bc6\u7801：\u666e\u901a\u6805\u680f（\u7b80\u5355\u6805\u680f） \u548c W \u578b\u6805\u680f（\u4e4b\u5b57\u5f62\u6805\u680f）\u3002\u4e0b\u9762\u5206\u522b\u8bf4\u660e\u5b83\u4eec\u7684\u539f\u7406\u4e0e\u7834\u89e3\u601d\u8def\u3002<\/p>\n

    2. \u7279\u8d28\u4e00：\u666e\u901a\u6805\u680f（\u7b80\u5355\u6805\u680f）<\/h3>\n

    2.1 \u52a0\u5bc6\u539f\u7406<\/h4>\n

    \u666e\u901a\u6805\u680f\u7684\u56f4\u680f\u662f\u4e00\u4e2a\u89c4\u6574\u7684\u77e9\u5f62：\u628a\u660e\u6587\u6309\u884c\u4f9d\u6b21\u5199\u5165，\u7136\u540e\u6309\u5217\u4f9d\u6b21\u8bfb\u51fa\u3002<\/p>\n

    \u4ee5\u660e\u6587 HELLOWORLD\u3001\u680f\u6570 3 \u4e3a\u4f8b，\u6309\u884c\u5199\u5165：<\/p>\n

    H E L L
    \nO W O R
    \nL D<\/p>\n

    \u6309\u5217\u8bfb\u51fa（\u4ece\u4e0a\u5230\u4e0b\u3001\u4ece\u5de6\u5230\u53f3）：<\/p>\n

    H O L | E W D | L O | L R<\/p>\n

    \u5f97\u5230\u5bc6\u6587 HOLEWDLOLR\u3002<\/p>\n

    2.2 \u89e3\u5bc6\u601d\u8def<\/h4>\n

    \u89e3\u5bc6\u662f\u52a0\u5bc6\u7684\u9006\u8fc7\u7a0b，\u96be\u70b9\u5728\u4e8e：\u6211\u4eec\u53ea\u77e5\u9053\u5bc6\u6587\u548c\u680f\u6570，\u4e0d\u77e5\u9053\u6bcf\u4e00\u884c\u539f\u672c\u6709\u591a\u5c11\u4e2a\u5b57\u7b26\u3002<\/p>\n

    \u5173\u952e\u89c2\u5bdf\u662f：\u603b\u957f\u5ea6 L \u9664\u4ee5\u680f\u6570 rails，\u5546 base \u662f\u6bcf\u884c\u7684\u57fa\u7840\u957f\u5ea6，\u4f59\u6570 extra \u8868\u793a\u524d extra \u884c\u4f1a\u591a\u51fa\u4e00\u4e2a\u5b57\u7b26\u3002\u4e8e\u662f\u6bcf\u884c\u7684\u957f\u5ea6\u53ef\u4ee5\u786e\u5b9a：<\/p>\n

    base =<\/span> L \/\/<\/span> rails
    \nextra =<\/span> L %<\/span> rails
    \nrow_lens =<\/span> [<\/span>base +<\/span> 1<\/span> if<\/span> i <<\/span> extra else<\/span> base for<\/span> i in<\/span> range<\/span>(<\/span>rails)<\/span>]<\/span><\/p>\n

    \u6709\u4e86\u6bcf\u884c\u957f\u5ea6，\u5c31\u80fd\u53cd\u63a8\u51fa\u6bcf\u4e00\u5217\u6709\u591a\u5c11\u4e2a\u5b57\u7b26（\u67d0\u4e00\u5217\u7684\u957f\u5ea6 = \u8be5\u5217\u4e0a\u6240\u6709\u884c\u4e2d\u201c\u8fd9\u4e00\u884c\u8fd8\u6709\u5b57\u7b26\u201d\u7684\u6570\u91cf）：<\/p>\n

    col_lens =<\/span> [<\/span>]<\/span>
    \nfor<\/span> j in<\/span> range<\/span>(<\/span>max<\/span>(<\/span>row_lens)<\/span>)<\/span>:<\/span>
    \n col_lens.<\/span>append(<\/span>sum<\/span>(<\/span>1<\/span> for<\/span> rl in<\/span> row_lens if<\/span> rl ><\/span> j)<\/span>)<\/span><\/p>\n

    \u63a5\u7740\u628a\u5bc6\u6587\u6309\u5217\u957f\u5ea6\u5207\u5206，\u8fd8\u539f\u51fa\u6bcf\u4e00\u5217\u7684\u5b57\u7b26：<\/p>\n

    cols =<\/span> [<\/span>]<\/span>
    \nidx =<\/span> 0<\/span>
    \nfor<\/span> cl in<\/span> col_lens:<\/span>
    \n cols.<\/span>append(<\/span>list<\/span>(<\/span>cipher[<\/span>idx:<\/span>idx +<\/span> cl]<\/span>)<\/span>)<\/span>
    \n idx +=<\/span> cl<\/p>\n

    \u6700\u540e\u6309\u201c\u884c\u4f18\u5148\u201d\u7684\u987a\u5e8f，\u4ece\u5404\u5217\u4e2d\u4f9d\u6b21\u53d6\u51fa\u5b57\u7b26，\u5c31\u5f97\u5230\u4e86\u660e\u6587：<\/p>\n

    result =<\/span> [<\/span>]<\/span>
    \nfor<\/span> r in<\/span> range<\/span>(<\/span>rails)<\/span>:<\/span>
    \n for<\/span> j in<\/span> range<\/span>(<\/span>row_lens[<\/span>r]<\/span>)<\/span>:<\/span>
    \n result.<\/span>append(<\/span>cols[<\/span>j]<\/span>[<\/span>r]<\/span>)<\/span>
    \nreturn<\/span> ''<\/span>.<\/span>join(<\/span>result)<\/span><\/p>\n

    \u5b8c\u6574\u51fd\u6570\u5982\u4e0b：<\/p>\n

    def<\/span> rail_fence_decrypt<\/span>(<\/span>cipher,<\/span> rails)<\/span>:<\/span>
    \n """\u7b80\u5355\u6805\u680f\u89e3\u5bc6"""<\/span>
    \n L =<\/span> len<\/span>(<\/span>cipher)<\/span>
    \n if<\/span> rails <=<\/span> 1<\/span> or<\/span> rails >=<\/span> L:<\/span>
    \n return<\/span> cipher
    \n base =<\/span> L \/\/<\/span> rails
    \n extra =<\/span> L %<\/span> rails
    \n row_lens =<\/span> [<\/span>base +<\/span> 1<\/span> if<\/span> i <<\/span> extra else<\/span> base for<\/span> i in<\/span> range<\/span>(<\/span>rails)<\/span>]<\/span>
    \n col_lens =<\/span> [<\/span>]<\/span>
    \n for<\/span> j in<\/span> range<\/span>(<\/span>max<\/span>(<\/span>row_lens)<\/span>)<\/span>:<\/span>
    \n col_lens.<\/span>append(<\/span>sum<\/span>(<\/span>1<\/span> for<\/span> rl in<\/span> row_lens if<\/span> rl ><\/span> j)<\/span>)<\/span>
    \n cols =<\/span> [<\/span>]<\/span>
    \n idx =<\/span> 0<\/span>
    \n for<\/span> cl in<\/span> col_lens:<\/span>
    \n cols.<\/span>append(<\/span>list<\/span>(<\/span>cipher[<\/span>idx:<\/span>idx +<\/span> cl]<\/span>)<\/span>)<\/span>
    \n idx +=<\/span> cl
    \n result =<\/span> [<\/span>]<\/span>
    \n for<\/span> r in<\/span> range<\/span>(<\/span>rails)<\/span>:<\/span>
    \n for<\/span> j in<\/span> range<\/span>(<\/span>row_lens[<\/span>r]<\/span>)<\/span>:<\/span>
    \n result.<\/span>append(<\/span>cols[<\/span>j]<\/span>[<\/span>r]<\/span>)<\/span>
    \n return<\/span> ''<\/span>.<\/span>join(<\/span>result)<\/span><\/p>\n

    \u6838\u5fc3\u601d\u60f3：\u5148\u6839\u636e\u957f\u5ea6\u5173\u7cfb\u201c\u91cd\u5efa\u56f4\u680f\u7684\u5f62\u72b6\u201d，\u518d\u628a\u5bc6\u6587\u586b\u56de\u56f4\u680f，\u6700\u540e\u6309\u5199\u5165\u987a\u5e8f\u8bfb\u51fa\u6765\u3002<\/p>\n

    3. \u7279\u8d28\u4e8c：W \u578b\u6805\u680f（\u4e4b\u5b57\u5f62\u6805\u680f）<\/h3>\n

    3.1 \u52a0\u5bc6\u539f\u7406<\/h4>\n

    W \u578b\u6805\u680f\u7684\u56f4\u680f\u4e0d\u518d\u662f\u77e9\u5f62，\u800c\u662f\u4e00\u6761\u4e0a\u4e0b\u8d77\u4f0f\u7684\u6298\u7ebf：\u5b57\u7b26\u6cbf\u7740 0 \u2192 1 \u2192 2 \u2192 … \u2192 rails-1 \u2192 rails-2 \u2192 … \u2192 0 \u7684\u8f68\u8ff9\u5199\u5165，\u50cf\u753b\u4e00\u4e2a\u201cW\u201d（\u6216\u8fde\u7eed\u7684\u952f\u9f7f）\u3002
    \n\u4ee5\u660e\u6587 HELLOWORLD\u3001\u680f\u6570 3 \u4e3a\u4f8b，\u5199\u5165\u8f68\u8ff9\u662f：<\/p>\n

    H . . . O . . . L .
    \n. E . L . W . R . D
    \n. . L . . . O . . .<\/p>\n

    \u6309\u884c\u8bfb\u51fa：\u7b2c 0 \u884c HOL，\u7b2c 1 \u884c ELWRD，\u7b2c 2 \u884c LO，\u5f97\u5230\u5bc6\u6587 HOLELWRDLO\u3002<\/p>\n

    3.2 \u89e3\u5bc6\u601d\u8def<\/h4>\n

    W \u578b\u6805\u680f\u7684\u89e3\u5bc6\u6bd4\u666e\u901a\u6805\u680f\u66f4\u201c\u806a\u660e\u201d\u4e00\u4e9b，\u56e0\u4e3a\u5b83\u4e0d\u9700\u8981\u731c\u6bcf\u884c\u957f\u5ea6\u2014\u2014\u8f68\u8ff9\u662f\u786e\u5b9a\u7684\u3002<\/p>\n

    \u7b2c\u4e00\u6b65，\u5148\u6839\u636e\u957f\u5ea6\u548c\u680f\u6570，\u628a\u6bcf\u4e2a\u4f4d\u7f6e\u5c5e\u4e8e\u54ea\u4e00\u884c\u7b97\u51fa\u6765（\u8fd9\u5c31\u662f\u5199\u5165\u8f68\u8ff9）：<\/p>\n

    pattern =<\/span> [<\/span>]<\/span>
    \nr =<\/span> 0<\/span>
    \ndirection =<\/span> 1<\/span>
    \nfor<\/span> _ in<\/span> range<\/span>(<\/span>L)<\/span>:<\/span>
    \n pattern.<\/span>append(<\/span>r)<\/span>
    \n if<\/span> r ==<\/span> 0<\/span>:<\/span>
    \n direction =<\/span> 1<\/span>
    \n elif<\/span> r ==<\/span> rails –<\/span> 1<\/span>:<\/span>
    \n direction =<\/span> –<\/span>1<\/span>
    \n r +=<\/span> direction<\/p>\n

    \u7b2c\u4e8c\u6b65，\u7edf\u8ba1\u6bcf\u4e00\u884c\u6709\u591a\u5c11\u4e2a\u5b57\u7b26，\u7136\u540e\u6309\u884c\u628a\u5bc6\u6587\u5207\u5206\u56de\u53bb：<\/p>\n

    row_counts =<\/span> [<\/span>0<\/span>]<\/span> *<\/span> rails
    \nfor<\/span> r in<\/span> pattern:<\/span>
    \n row_counts[<\/span>r]<\/span> +=<\/span> 1<\/span><\/p>\n

    rows =<\/span> [<\/span>]<\/span>
    \nidx =<\/span> 0<\/span>
    \nfor<\/span> rc in<\/span> row_counts:<\/span>
    \n rows.<\/span>append(<\/span>list<\/span>(<\/span>cipher[<\/span>idx:<\/span>idx +<\/span> rc]<\/span>)<\/span>)<\/span>
    \n idx +=<\/span> rc<\/p>\n

    \u7b2c\u4e09\u6b65，\u6cbf\u7740\u540c\u4e00\u6761\u8f68\u8ff9，\u4ece\u5bf9\u5e94\u7684\u884c\u91cc\u4f9d\u6b21\u53d6\u5b57\u7b26，\u5c31\u8fd8\u539f\u51fa\u660e\u6587：<\/p>\n

    result =<\/span> [<\/span>]<\/span>
    \nrow_idx =<\/span> [<\/span>0<\/span>]<\/span> *<\/span> rails
    \nfor<\/span> r in<\/span> pattern:<\/span>
    \n result.<\/span>append(<\/span>rows[<\/span>r]<\/span>[<\/span>row_idx[<\/span>r]<\/span>]<\/span>)<\/span>
    \n row_idx[<\/span>r]<\/span> +=<\/span> 1<\/span>
    \nreturn<\/span> ''<\/span>.<\/span>join(<\/span>result)<\/span><\/p>\n

    \u5b8c\u6574\u51fd\u6570\u5982\u4e0b：<\/p>\n

    def<\/span> zigzag_rail_fence_decrypt<\/span>(<\/span>cipher,<\/span> rails)<\/span>:<\/span>
    \n """W \u578b\u6805\u680f\u89e3\u5bc6"""<\/span>
    \n L =<\/span> len<\/span>(<\/span>cipher)<\/span>
    \n if<\/span> rails <=<\/span> 1<\/span> or<\/span> rails >=<\/span> L:<\/span>
    \n return<\/span> cipher
    \n pattern =<\/span> [<\/span>]<\/span>
    \n r =<\/span> 0<\/span>
    \n direction =<\/span> 1<\/span>
    \n for<\/span> _ in<\/span> range<\/span>(<\/span>L)<\/span>:<\/span>
    \n pattern.<\/span>append(<\/span>r)<\/span>
    \n if<\/span> r ==<\/span> 0<\/span>:<\/span>
    \n direction =<\/span> 1<\/span>
    \n elif<\/span> r ==<\/span> rails –<\/span> 1<\/span>:<\/span>
    \n direction =<\/span> –<\/span>1<\/span>
    \n r +=<\/span> direction
    \n row_counts =<\/span> [<\/span>0<\/span>]<\/span> *<\/span> rails
    \n for<\/span> r in<\/span> pattern:<\/span>
    \n row_counts[<\/span>r]<\/span> +=<\/span> 1<\/span>
    \n rows =<\/span> [<\/span>]<\/span>
    \n idx =<\/span> 0<\/span>
    \n for<\/span> rc in<\/span> row_counts:<\/span>
    \n rows.<\/span>append(<\/span>list<\/span>(<\/span>cipher[<\/span>idx:<\/span>idx +<\/span> rc]<\/span>)<\/span>)<\/span>
    \n idx +=<\/span> rc
    \n result =<\/span> [<\/span>]<\/span>
    \n row_idx =<\/span> [<\/span>0<\/span>]<\/span> *<\/span> rails
    \n for<\/span> r in<\/span> pattern:<\/span>
    \n result.<\/span>append(<\/span>rows[<\/span>r]<\/span>[<\/span>row_idx[<\/span>r]<\/span>]<\/span>)<\/span>
    \n row_idx[<\/span>r]<\/span> +=<\/span> 1<\/span>
    \n return<\/span> ''<\/span>.<\/span>join(<\/span>result)<\/span><\/p>\n

    \u6838\u5fc3\u601d\u60f3：\u8f68\u8ff9\u662f\u516c\u5f00\u7684，\u6240\u4ee5\u53ea\u8981\u77e5\u9053\u680f\u6570，\u5c31\u80fd\u7cbe\u786e\u8fd8\u539f\u6bcf\u4e2a\u5b57\u7b26\u7684\u5f52\u5c5e\u884c，\u518d\u6309\u8f68\u8ff9\u56de\u586b\u5373\u53ef\u3002<\/p>\n

    3.3 \u4e24\u79cd\u6805\u680f\u5bf9\u6bd4<\/h4>\n

    \u628a\u4e24\u79cd\u6805\u680f\u653e\u5728\u4e00\u8d77\u770b，\u5dee\u5f02\u5176\u5b9e\u90fd\u6e90\u4e8e\u201c\u56f4\u680f\u5f62\u72b6\u201d\u8fd9\u4e00\u4e2a\u6e90\u5934：<\/p>\n\n\u5bf9\u6bd4\u7ef4\u5ea6\u666e\u901a\u6805\u680f（\u7b80\u5355\u6805\u680f）W \u578b\u6805\u680f（\u4e4b\u5b57\u5f62\u6805\u680f）<\/tr>\n\n\n\n\n\n\n\n
    \u56f4\u680f\u5f62\u72b6<\/td>\n\u89c4\u6574\u77e9\u5f62，\u884c\u6570\u56fa\u5b9a\u4e3a\u680f\u6570<\/td>\n\u4e0a\u4e0b\u8d77\u4f0f\u7684\u6298\u7ebf，\u5f62\u5982\u8fde\u7eed\u7684\u201cW\u201d<\/td>\n<\/tr>\n
    \u5199\u5165\u8f68\u8ff9<\/td>\n\u6309\u884c\u4ece\u5de6\u5230\u53f3\u4f9d\u6b21\u586b\u5145，\u586b\u6ee1\u4e00\u884c\u6362\u4e0b\u4e00\u884c<\/td>\n\u6cbf 0 \u2192 1 \u2192 \u2026 \u2192 rails-1 \u2192 rails-2 \u2192 \u2026 \u2192 0 \u5f80\u8fd4\u79fb\u52a8<\/td>\n<\/tr>\n
    \u8bfb\u51fa\u65b9\u5f0f<\/td>\n\u6309\u5217\u4ece\u4e0a\u5230\u4e0b\u3001\u4ece\u5de6\u5230\u53f3\u8bfb\u51fa<\/td>\n\u6309\u884c\u8bfb\u51fa，\u6bcf\u884c\u5185\u90e8\u4fdd\u6301\u5199\u5165\u65f6\u7684\u5148\u540e\u987a\u5e8f<\/td>\n<\/tr>\n
    \u89e3\u5bc6\u5173\u952e<\/td>\n\u5148\u7531\u603b\u957f\u5ea6\u548c\u680f\u6570\u63a8\u51fa\u6bcf\u884c\u3001\u6bcf\u5217\u7684\u957f\u5ea6，\u91cd\u5efa\u77e9\u5f62\u518d\u56de\u586b<\/td>\n\u5148\u7531\u957f\u5ea6\u548c\u680f\u6570\u751f\u6210\u786e\u5b9a\u7684\u8f68\u8ff9 pattern，\u7edf\u8ba1\u5404\u884c\u5b57\u7b26\u6570\u540e\u6309\u8f68\u8ff9\u56de\u586b<\/td>\n<\/tr>\n
    \u65f6\u95f4\u590d\u6742\u5ea6<\/td>\nO(L)，\u9700\u8981\u989d\u5916\u8ba1\u7b97\u884c\u5217\u957f\u5ea6<\/td>\nO(L)，\u9700\u8981\u989d\u5916\u751f\u6210\u8f68\u8ff9\u6570\u7ec4<\/td>\n<\/tr>\n
    \u5178\u578b\u5bc6\u6587\u7279\u5f81<\/td>\n\u672b\u884c\u53ef\u80fd\u4e0d\u6ee1，\u5bc6\u6587\u5c3e\u90e8\u5b57\u7b26\u6765\u81ea\u8f83\u77ed\u7684\u5217<\/td>\n\u9996\u5c3e\u884c\u5b57\u7b26\u6570\u660e\u663e\u5c11\u4e8e\u4e2d\u95f4\u884c，\u5bc6\u6587\u4e2d\u6bb5\u66f4\u201c\u5bc6\u96c6\u201d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u9009\u62e9\u5efa\u8bae：\u5982\u679c\u9898\u76ee\u53ea\u8bf4\u662f\u201c\u6805\u680f\u5bc6\u7801\u201d\u3001\u6ca1\u6709\u989d\u5916\u63d0\u793a，\u4f18\u5148\u5c1d\u8bd5\u666e\u901a\u6805\u680f，\u56e0\u4e3a\u5b83\u662f\u6559\u6750\u548c\u5165\u95e8\u9898\u91cc\u6700\u5e38\u89c1\u7684\u9ed8\u8ba4\u5f62\u6001；\u5982\u679c\u666e\u901a\u6805\u680f\u5404\u680f\u6570\u90fd\u89e3\u4e0d\u51fa\u53ef\u8bfb\u6587\u672c，\u6216\u8005\u5bc6\u6587\u957f\u5ea6\u4e0e\u680f\u6570\u7ec4\u5408\u4e0b\u9996\u5c3e\u884c\u5b57\u7b26\u6570\u660e\u663e\u504f\u5c11，\u5c31\u5e94\u91cd\u70b9\u5c1d\u8bd5 W \u578b\u6805\u680f\u3002\u5b9e\u9645\u505a\u9898\u65f6\u6700\u7a33\u59a5\u7684\u505a\u6cd5\u4ecd\u662f\u4e24\u79cd\u90fd\u8dd1\u4e00\u904d，\u518d\u7528\u82f1\u6587\u8bc4\u5206\u6392\u5e8f\u6311\u51fa\u6700\u50cf\u4eba\u8bdd\u7684\u7ed3\u679c\u3002<\/p>\n

    4. \u81ea\u52a8\u5c1d\u8bd5\u6240\u6709\u680f\u6570：\u7528\u82f1\u6587\u8bc4\u5206\u6392\u5e8f<\/h3>\n

    \u5b9e\u9645\u505a\u9898\u65f6，\u6211\u4eec\u5f80\u5f80\u4e0d\u77e5\u9053\u680f\u6570，\u4e5f\u4e0d\u77e5\u9053\u662f\u666e\u901a\u6805\u680f\u8fd8\u662f W \u578b\u6805\u680f\u3002\u6700\u76f4\u63a5\u7684\u529e\u6cd5\u662f：\u628a\u6240\u6709\u53ef\u80fd\u7684\u680f\u6570\u3001\u4e24\u79cd\u7c7b\u578b\u5168\u90e8\u8bd5\u4e00\u904d，\u7136\u540e\u6309\u201c\u50cf\u4e0d\u50cf\u6b63\u5e38\u82f1\u6587\u201d\u6765\u6392\u5e8f\u3002<\/p>\n

    4.1 \u82f1\u6587\u8bc4\u5206\u51fd\u6570<\/h4>\n

    \u8bc4\u5206\u4ece\u4e09\u4e2a\u7ef4\u5ea6\u7d2f\u52a0：<\/p>\n

      \n
    • \u5e38\u89c1\u5355\u8bcd\u547d\u4e2d：the\u3001and\u3001flag\u3001ctf \u7b49\u8bcd\u51fa\u73b0\u4e00\u6b21\u52a0 10 \u5206；<\/li>\n
    • \u7a7a\u683c\u6570\u91cf：\u6b63\u5e38\u82f1\u6587\u6709\u7a7a\u683c，\u7a7a\u683c\u8d8a\u591a\u8d8a\u53ef\u80fd\u662f\u660e\u6587；<\/li>\n
    • \u5b57\u6bcd\u9891\u7387：\u6309\u82f1\u6587\u5b57\u6bcd\u51fa\u73b0\u9891\u7387\u8868\u7d2f\u52a0，\u8d8a\u63a5\u8fd1\u81ea\u7136\u8bed\u8a00\u5f97\u5206\u8d8a\u9ad8\u3002<\/li>\n<\/ul>\n

      def<\/span> score_english<\/span>(<\/span>text)<\/span>:<\/span>
      \n common =<\/span> [<\/span>
      \n 'the'<\/span>,<\/span> 'and'<\/span>,<\/span> 'that'<\/span>,<\/span> 'have'<\/span>,<\/span> 'for'<\/span>,<\/span> 'not'<\/span>,<\/span> 'with'<\/span>,<\/span> 'you'<\/span>,<\/span>
      \n 'this'<\/span>,<\/span> 'but'<\/span>,<\/span> 'his'<\/span>,<\/span> 'from'<\/span>,<\/span> 'they'<\/span>,<\/span> 'say'<\/span>,<\/span> 'her'<\/span>,<\/span> 'she'<\/span>,<\/span>
      \n 'will'<\/span>,<\/span> 'one'<\/span>,<\/span> 'all'<\/span>,<\/span> 'would'<\/span>,<\/span> 'there'<\/span>,<\/span> 'their'<\/span>,<\/span> 'what'<\/span>,<\/span>
      \n 'out'<\/span>,<\/span> 'about'<\/span>,<\/span> 'who'<\/span>,<\/span> 'get'<\/span>,<\/span> 'which'<\/span>,<\/span> 'when'<\/span>,<\/span> 'make'<\/span>,<\/span>
      \n 'can'<\/span>,<\/span> 'like'<\/span>,<\/span> 'time'<\/span>,<\/span> 'just'<\/span>,<\/span> 'him'<\/span>,<\/span> 'know'<\/span>,<\/span> 'take'<\/span>,<\/span>
      \n 'people'<\/span>,<\/span> 'into'<\/span>,<\/span> 'year'<\/span>,<\/span> 'your'<\/span>,<\/span> 'good'<\/span>,<\/span> 'some'<\/span>,<\/span> 'could'<\/span>,<\/span>
      \n 'them'<\/span>,<\/span> 'see'<\/span>,<\/span> 'other'<\/span>,<\/span> 'than'<\/span>,<\/span> 'then'<\/span>,<\/span> 'now'<\/span>,<\/span> 'look'<\/span>,<\/span>
      \n 'only'<\/span>,<\/span> 'come'<\/span>,<\/span> 'its'<\/span>,<\/span> 'over'<\/span>,<\/span> 'think'<\/span>,<\/span> 'also'<\/span>,<\/span> 'back'<\/span>,<\/span>
      \n 'after'<\/span>,<\/span> 'use'<\/span>,<\/span> 'two'<\/span>,<\/span> 'how'<\/span>,<\/span> 'our'<\/span>,<\/span> 'work'<\/span>,<\/span> 'first'<\/span>,<\/span>
      \n 'well'<\/span>,<\/span> 'way'<\/span>,<\/span> 'even'<\/span>,<\/span> 'new'<\/span>,<\/span> 'want'<\/span>,<\/span> 'because'<\/span>,<\/span> 'any'<\/span>,<\/span>
      \n 'these'<\/span>,<\/span> 'give'<\/span>,<\/span> 'day'<\/span>,<\/span> 'most'<\/span>,<\/span> 'us'<\/span>,<\/span> 'flag'<\/span>,<\/span> 'ctf'<\/span>
      \n ]<\/span>
      \n freq =<\/span> {<\/span>
      \n 'a'<\/span>:<\/span> 8.17<\/span>,<\/span> 'b'<\/span>:<\/span> 1.49<\/span>,<\/span> 'c'<\/span>:<\/span> 2.78<\/span>,<\/span> 'd'<\/span>:<\/span> 4.25<\/span>,<\/span> 'e'<\/span>:<\/span> 12.70<\/span>,<\/span>
      \n 'f'<\/span>:<\/span> 2.23<\/span>,<\/span> 'g'<\/span>:<\/span> 2.02<\/span>,<\/span> 'h'<\/span>:<\/span> 6.09<\/span>,<\/span> 'i'<\/span>:<\/span> 6.97<\/span>,<\/span> 'j'<\/span>:<\/span> 0.15<\/span>,<\/span>
      \n 'k'<\/span>:<\/span> 0.77<\/span>,<\/span> 'l'<\/span>:<\/span> 4.03<\/span>,<\/span> 'm'<\/span>:<\/span> 2.41<\/span>,<\/span> 'n'<\/span>:<\/span> 6.75<\/span>,<\/span> 'o'<\/span>:<\/span> 7.51<\/span>,<\/span>
      \n 'p'<\/span>:<\/span> 1.93<\/span>,<\/span> 'q'<\/span>:<\/span> 0.10<\/span>,<\/span> 'r'<\/span>:<\/span> 5.99<\/span>,<\/span> 's'<\/span>:<\/span> 6.33<\/span>,<\/span> 't'<\/span>:<\/span> 9.06<\/span>,<\/span>
      \n 'u'<\/span>:<\/span> 2.76<\/span>,<\/span> 'v'<\/span>:<\/span> 0.98<\/span>,<\/span> 'w'<\/span>:<\/span> 2.36<\/span>,<\/span> 'x'<\/span>:<\/span> 0.15<\/span>,<\/span> 'y'<\/span>:<\/span> 1.97<\/span>,<\/span>
      \n 'z'<\/span>:<\/span> 0.07<\/span>
      \n }<\/span>
      \n s =<\/span> text.<\/span>lower(<\/span>)<\/span>
      \n score =<\/span> 0.0<\/span>
      \n padded =<\/span> ' '<\/span> +<\/span> s +<\/span> ' '<\/span>
      \n for<\/span> w in<\/span> common:<\/span>
      \n score +=<\/span> padded.<\/span>count(<\/span>' '<\/span> +<\/span> w +<\/span> ' '<\/span>)<\/span> *<\/span> 10<\/span>
      \n score +=<\/span> s.<\/span>count(<\/span>' '<\/span>)<\/span>
      \n for<\/span> ch in<\/span> s:<\/span>
      \n if<\/span> 'a'<\/span> <=<\/span> ch <=<\/span> 'z'<\/span>:<\/span>
      \n score +=<\/span> freq.<\/span>get(<\/span>ch,<\/span> 0<\/span>)<\/span>
      \n return<\/span> score<\/p>\n

      4.2 \u4e3b\u7a0b\u5e8f：\u904d\u5386 + \u53bb\u91cd + \u6392\u5e8f<\/h4>\n

      \u4e3b\u7a0b\u5e8f\u5148\u8bfb\u5165\u5bc6\u6587，\u518d\u5bf9 2 ~ max_rails \u7684\u6bcf\u4e2a\u680f\u6570\u5206\u522b\u8dd1\u4e24\u79cd\u89e3\u5bc6，\u6536\u96c6\u7ed3\u679c\u540e\u53bb\u91cd\u3001\u6309\u8bc4\u5206\u964d\u5e8f\u8f93\u51fa\u524d 15 \u6761：<\/p>\n

      def<\/span> main<\/span>(<\/span>)<\/span>:<\/span>
      \n cipher =<\/span> input<\/span>(<\/span>"\u8bf7\u8f93\u5165\u6805\u680f\u5bc6\u7801\u5bc6\u6587: "<\/span>)<\/span>.<\/span>strip(<\/span>)<\/span>
      \n if<\/span> not<\/span> cipher:<\/span>
      \n print<\/span>(<\/span>"\u5bc6\u6587\u4e0d\u80fd\u4e3a\u7a7a"<\/span>)<\/span>
      \n return<\/span><\/p>\n

      L =<\/span> len<\/span>(<\/span>cipher)<\/span>
      \n if<\/span> L <<\/span> 4<\/span>:<\/span>
      \n print<\/span>(<\/span>"\u5bc6\u6587\u592a\u77ed，\u65e0\u6cd5\u5c1d\u8bd5\u6805\u680f"<\/span>)<\/span>
      \n return<\/span><\/p>\n

      max_rails_str =<\/span> input<\/span>(<\/span>f"\u8bf7\u8f93\u5165\u6700\u5927\u680f\u6570（\u76f4\u63a5\u56de\u8f66\u9ed8\u8ba4 <\/span>{<\/span>L \/\/<\/span> 2<\/span>}<\/span><\/span>）: "<\/span><\/span>)<\/span>.<\/span>strip(<\/span>)<\/span>
      \n if<\/span> max_rails_str:<\/span>
      \n try<\/span>:<\/span>
      \n max_rails =<\/span> int<\/span>(<\/span>max_rails_str)<\/span>
      \n except<\/span> ValueError:<\/span>
      \n print<\/span>(<\/span>"\u680f\u6570\u5fc5\u987b\u662f\u6574\u6570"<\/span>)<\/span>
      \n return<\/span>
      \n else<\/span>:<\/span>
      \n max_rails =<\/span> L \/\/<\/span> 2<\/span><\/p>\n

      max_rails =<\/span> min<\/span>(<\/span>max_rails,<\/span> L –<\/span> 1<\/span>)<\/span>
      \n if<\/span> max_rails <<\/span> 2<\/span>:<\/span>
      \n print<\/span>(<\/span>"\u6700\u5927\u680f\u6570\u5fc5\u987b\u81f3\u5c11\u4e3a 2"<\/span>)<\/span>
      \n return<\/span><\/p>\n

      results =<\/span> [<\/span>]<\/span>
      \n for<\/span> rails in<\/span> range<\/span>(<\/span>2<\/span>,<\/span> max_rails +<\/span> 1<\/span>)<\/span>:<\/span>
      \n plain1 =<\/span> rail_fence_decrypt(<\/span>cipher,<\/span> rails)<\/span>
      \n plain2 =<\/span> zigzag_rail_fence_decrypt(<\/span>cipher,<\/span> rails)<\/span>
      \n results.<\/span>append(<\/span>(<\/span>'\u7b80\u5355\u6805\u680f'<\/span>,<\/span> rails,<\/span> plain1,<\/span> score_english(<\/span>plain1)<\/span>)<\/span>)<\/span>
      \n results.<\/span>append(<\/span>(<\/span>'W\u578b\u6805\u680f'<\/span>,<\/span> rails,<\/span> plain2,<\/span> score_english(<\/span>plain2)<\/span>)<\/span>)<\/span><\/p>\n

      seen =<\/span> set<\/span>(<\/span>)<\/span>
      \n unique =<\/span> [<\/span>]<\/span>
      \n for<\/span> typ,<\/span> rails,<\/span> plain,<\/span> score in<\/span> results:<\/span>
      \n if<\/span> plain in<\/span> seen:<\/span>
      \n continue<\/span>
      \n seen.<\/span>add(<\/span>plain)<\/span>
      \n unique.<\/span>append(<\/span>(<\/span>typ,<\/span> rails,<\/span> plain,<\/span> score)<\/span>)<\/span><\/p>\n

      unique.<\/span>sort(<\/span>key=<\/span>lambda<\/span> x:<\/span> –<\/span>x[<\/span>3<\/span>]<\/span>)<\/span><\/p>\n

      print<\/span>(<\/span>"\\\\n===== \u89e3\u7801\u7ed3\u679c（\u6309\u8bc4\u5206\u6392\u5e8f） ====="<\/span>)<\/span>
      \n top_n =<\/span> 15<\/span>
      \n for<\/span> typ,<\/span> rails,<\/span> plain,<\/span> score in<\/span> unique[<\/span>:<\/span>top_n]<\/span>:<\/span>
      \n print<\/span>(<\/span>f"[<\/span>{<\/span>typ}<\/span><\/span> \u680f\u6570=<\/span>{<\/span>rails}<\/span><\/span>] \u8bc4\u5206=<\/span>{<\/span>score:<\/span>.1f<\/span>}<\/span><\/span>"<\/span><\/span>)<\/span>
      \n print<\/span>(<\/span>f" <\/span>{<\/span>plain}<\/span><\/span>"<\/span><\/span>)<\/span><\/p>\n

      if<\/span> len<\/span>(<\/span>unique)<\/span> ><\/span> top_n:<\/span>
      \n print<\/span>(<\/span>f"\\\\n… \u8fd8\u6709 <\/span>{<\/span>len<\/span>(<\/span>unique)<\/span> –<\/span> top_n}<\/span><\/span> \u4e2a\u7ed3\u679c\u672a\u663e\u793a"<\/span><\/span>)<\/span><\/p>\n

      if<\/span> __name__ ==<\/span> "__main__"<\/span>:<\/span>
      \n main(<\/span>)<\/span><\/p>\n

      4.3 \u8fd0\u884c\u793a\u4f8b<\/h4>\n

      \u8bf7\u8f93\u5165\u6805\u680f\u5bc6\u7801\u5bc6\u6587: HOLEWDLOLR
      \n\u8bf7\u8f93\u5165\u6700\u5927\u680f\u6570（\u76f4\u63a5\u56de\u8f66\u9ed8\u8ba4 5）: <\/p>\n

      ===== \u89e3\u7801\u7ed3\u679c（\u6309\u8bc4\u5206\u6392\u5e8f） =====
      \n[\u7b80\u5355\u6805\u680f \u680f\u6570=3] \u8bc4\u5206=68.4
      \n HELLOWORLD
      \n[W\u578b\u6805\u680f \u680f\u6570=3] \u8bc4\u5206=52.1
      \n HLOWOLDLER
      \n…<\/p>\n

      \u8bc4\u5206\u6700\u9ad8\u7684\u90a3\u6761，\u901a\u5e38\u5c31\u662f\u6b63\u786e\u7b54\u6848\u3002<\/p>\n

      5. \u6805\u680f\u5bc6\u7801\u5728\u53e4\u5178\u5bc6\u7801\u4e2d\u7684\u4f4d\u7f6e<\/h3>\n

      \u6805\u680f\u5bc6\u7801\u5c5e\u4e8e\u53e4\u5178\u5bc6\u7801\u4e2d\u7684\u7f6e\u6362\u5bc6\u7801（Transposition Cipher） \u4e00\u7c7b\u3002<\/p>\n

      \u53e4\u5178\u5bc6\u7801\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4e24\u5927\u5206\u652f：<\/p>\n

        \n
      • \u66ff\u6362\u5bc6\u7801（Substitution）：\u5b57\u7b26\u672c\u8eab\u88ab\u6362\u6210\u522b\u7684\u5b57\u7b26，\u6bd4\u5982\u51ef\u6492\u5bc6\u7801\u3001\u7ef4\u5409\u5c3c\u4e9a\u5bc6\u7801\u3001\u4eff\u5c04\u5bc6\u7801；<\/li>\n
      • \u7f6e\u6362\u5bc6\u7801（Transposition）：\u5b57\u7b26\u672c\u8eab\u4e0d\u53d8，\u53ea\u662f\u6539\u53d8\u6392\u5217\u987a\u5e8f，\u6bd4\u5982\u6805\u680f\u5bc6\u7801\u3001\u5217\u7f6e\u6362\u5bc6\u7801\u3001\u77e9\u9635\u8f6c\u7f6e\u3002<\/li>\n<\/ul>\n

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          \n
        • \u5b83\u4e0d\u6539\u53d8\u5b57\u6bcd\u9891\u7387\u5206\u5e03，\u6240\u4ee5\u5355\u9760\u9891\u7387\u5206\u6790\u65e0\u6cd5\u7834\u89e3，\u5fc5\u987b\u7ed3\u5408\u7ed3\u6784（\u680f\u6570\u3001\u8f68\u8ff9）\u6765\u8fd8\u539f；<\/li>\n
        • \u5b83\u7684\u5bc6\u94a5\u7a7a\u95f4\u5f88\u5c0f（\u672c\u8d28\u4e0a\u53ea\u6709\u680f\u6570\u4e00\u4e2a\u53c2\u6570），\u73b0\u4ee3\u8ba1\u7b97\u6761\u4ef6\u4e0b\u66b4\u529b\u679a\u4e3e\u6240\u6709\u680f\u6570\u51e0\u4e4e\u77ac\u95f4\u5b8c\u6210，\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u5b83\u53ea\u80fd\u4f5c\u4e3a\u6559\u5b66\u548c CTF \u5165\u95e8\u9898\u51fa\u73b0，\u800c\u4e0d\u80fd\u7528\u4e8e\u771f\u5b9e\u52a0\u5bc6\u3002<\/li>\n<\/ul>\n

          \u7406\u89e3\u4e86\u201c\u56f4\u680f\u201d\u8fd9\u4e2a\u62bd\u8c61\u6982\u5ff5，\u518d\u770b\u666e\u901a\u6805\u680f\u548c W \u578b\u6805\u680f，\u5c31\u4f1a\u53d1\u73b0\u5b83\u4eec\u53ea\u662f\u540c\u4e00\u601d\u60f3\u4e0b\u7684\u4e24\u79cd\u56f4\u680f\u5f62\u72b6；\u800c\u81ea\u52a8\u89e3\u7801\u811a\u672c，\u672c\u8d28\u4e0a\u5c31\u662f\u628a\u201c\u6240\u6709\u53ef\u80fd\u7684\u56f4\u680f\u5f62\u72b6\u90fd\u8bd5\u4e00\u904d，\u518d\u7528\u8bed\u8a00\u6a21\u578b\u6253\u5206\u6311\u51fa\u6700\u50cf\u4eba\u8bdd\u7684\u90a3\u4e2a\u201d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

          1. \u4ec0\u4e48\u662f\u201c\u56f4\u680f\u201d\u6458\u8981：\u672c\u6587\u4ece\u201c\u56f4\u680f\u201d\u8fd9\u4e00\u62bd\u8c61\u6982\u5ff5\u51fa\u53d1，\u8bf4\u660e\u6805\u680f\u5bc6\u7801\u7684\u672c\u8d28\u662f\u201c\u5199\u5165\u987a\u5e8f \u2260 \u8bfb\u51fa\u987a\u5e8f\u201d\u3002\u56f4\u7ed5\u56f4\u680f\u5f62\u72b6\u4e0e\u8bfb\u51fa\u65b9\u5411\u4e24\u4e2a\u7279\u8d28，\u5206\u522b\u8bb2\u89e3\u666e\u901a\u6805\u680f（\u6309\u884c\u5199\u5165\u3001\u6309\u5217\u8bfb\u51fa）\u4e0e W \u578b\u6805\u680f（\u4e4b\u5b57\u5f62\u5199\u5165\u3001\u6309\u884c\u8bfb\u51fa）\u7684\u52a0\u5bc6\u539f\u7406\u4e0e\u89e3\u5bc6\u601d\u8def，\u5e76\u7528 Markdown \u8868\u683c\u4ece\u516d\u4e2a\u7ef4\u5ea6\u5bf9\u6bd4\u4e24\u8005\u3002\u968f\u540e\u7ed9\u51fa\u81ea\u52a8\u5c1d\u8bd5\u6240\u6709\u680f\u6570\u3001\u7528\u82f1\u6587\u8bc4\u5206\u6392\u5e8f\u7684\u5b8c\u6574 Python \u89e3\u7801\u811a\u672c\u4e0e\u8fd0\u884c\u793a\u4f8b&#<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11820,78],"topic":[],"class_list":["post-120752","post","type-post","status-publish","format-standard","hentry","category-server","tag-atomgit","tag-78"],"yoast_head":"\n\u6805\u680f\u5bc6\u7801\uff08Rail Fence Cipher\uff09\u8be6\u89e3\uff1a\u4ece\u56f4\u680f\u6982\u5ff5\u5230\u81ea\u52a8\u89e3\u7801 - 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