{"id":2065,"date":"2022-07-01T16:57:17","date_gmt":"2022-07-01T16:57:17","guid":{"rendered":"https:\/\/www.zttofficial.com\/?p=2065"},"modified":"2025-11-18T05:47:11","modified_gmt":"2025-11-18T05:47:11","slug":"%e5%af%86%e7%a2%bc%e5%ad%b8%ef%bc%882%ef%bc%89%ef%bc%9a-modern-block-ciphers","status":"publish","type":"post","link":"https:\/\/www.zttofficial.com\/?p=2065","title":{"rendered":"\u5bc6\u78bc\u5b78\uff082\uff09\uff1a Modern Block Ciphers"},"content":{"rendered":"\n

Block Ciphers \u53ef\u4ee5\u8b6f\u4f5c\u5206\u7d44\u52a0\u5bc6\u6216\u8005\u5206\u584a\u52a0\u5bc6\u3002<\/p>\n\n\n\n

\u5e38\u7528 Block Ciphers \u76f8\u63d0\u4e26\u8ad6\u7684\u52a0\u5bc6\u65b9\u5f0f\u662f Stream Ciphers\uff0c\u53ef\u8b6f\u4f5c\u4e32\u6d41\u52a0\u5bc6\u6cd5\u3002\u5169\u8005\u90fd\u662f\u66ff\u63db\u5f0f\u5bc6\u78bc\uff08Substitution ciphers\uff09\uff0c\u90fd\u61c9\u7528\u4e86\u53ef\u9006\u6620\u5c04\uff08reversible mapping\uff09\uff1a<\/p>\n\n\n

\n
\"\"\/<\/figure>\n<\/div>\n\n\n

Stream Ciphers<\/h2>\n\n\n\n

\u4e32\u6d41\u52a0\u5bc6\u6cd5\u662f\u4e00\u7a2e\u5c0d\u7a31\u5bc6\u9470\u5bc6\u78bc\uff0c\u5176\u4e2d\u660e\u6587\u6578\u5b57\u8207\u507d\u96a8\u6a5f\u5bc6\u78bc\u6578\u5b57\u6d41\uff08\u5bc6\u9470\u6d41\uff09\u76f8\u7d50\u5408\u3002\u5728\u5be6\u8e10\u4e2d\uff0c\u4e00\u500b\u6578\u5b57\u901a\u5e38\u662f\u4e00\u500b bit\uff0c\u8207\u7570\u6216 \uff08XOR\uff09\u7d44\u5408\u64cd\u4f5c\uff0c\u628a\u660e\u6587\u8a0a\u606f\u9010\u500b bit \u8f49\u63db\u6210\u5bc6\u6587\u3002<\/p>\n\n\n\n

\u5178\u578b\u7684 Stream Ciphers \u662f\u81ea\u52d5\u52a0\u5bc6\u7684 Vigen\u00e8re \u5bc6\u78bc\u548c Vernam \u5bc6\u78bc\u3002<\/p>\n\n\n\n

\u8f03\u6709\u540d\u7684 Stream Ciphers \u662f RC4\u3002<\/p>\n\n\n\n

\"\"\/<\/figure>\n\n\n\n

RC4<\/strong><\/p>\n\n\n\n

RSA DSI \u64c1\u6709\u7684\u5c08\u6709\u5bc6\u78bc\uff0c\u7531 Ron Rivest \u8a2d\u8a08\uff0c\u7c21\u55ae\u4f46\u6709\u6548\u3002\u5bc6\u9470\u5927\u5c0f\u53ef\u8b8a\uff0c\u662f\u4e00\u7a2e\u9762\u5411\u5b57\u7bc0\u7684\u4e32\u6d41\u52a0\u5bc6\u6cd5\u3002\u5728 SSL\/TLS\u3001\u7121\u7dda WEP \u4e2d\u5ee3\u6cdb\u4f7f\u7528\u3002\u5bc6\u9470\u5f62\u6210\u6240\u6709 8-bit \u7684\u96a8\u6a5f\u6392\u5217\uff0c\u4f7f\u7528\u8a72\u6392\u5217\u4f86\u6253\u4e82\u8f38\u5165\u4fe1\u606f\uff0c\u4e00\u6b21\u8655\u7406\u4e00\u500b\u5b57\u7bc0\u3002<\/p>\n\n\n\n

RC4 Key Schedule:<\/p>\n\n\n\n

    \n
  • \u4ee5\u6578\u5b57\u6578\u7d44 S \u958b\u982d\uff1a0..255<\/li>\n\n\n\n
  • \u4f7f\u7528\u9375\u4f86\u5b8c\u5168\u5730\u6253\u4e82<\/li>\n\n\n\n
  • S \u5f62\u6210\u5bc6\u78bc\u7684\u5167\u90e8\u72c0\u614b<\/li>\n\n\n\n
  • \u7d66\u5b9a\u4e00\u500b\u9577\u5ea6\u70ba keylen \u500b\u5b57\u7bc0\u7684\u5bc6\u9470 K\uff1a<\/li>\n<\/ul>\n\n\n\n
    for i= 0 to 255 do\n   S(i) = i\n   T(i) = K(imod keylen)\n   j = 0\nfor i= 0 to 255 do \n   j = (j + S(i) + T(i)) mod 256 \n   swap (S(i), S(j))<\/code><\/pre>\n\n\n\n
    RC4 \u52a0\u89e3\u5bc6\uff1a<\/p>\n\n\n\n
      \n
    • \u52a0\u5bc6\u7e7c\u7e8c\u6253\u4e82\u6578\u7d44\u503c\u3002<\/li>\n\n\n\n
    • \u5df2\u6253\u4e82\u7684\u6bcf\u5c0d\u7684\u7e3d\u548c\u9078\u53d6 stream key \u503c\u3002<\/li>\n\n\n\n
    • \u8207\u8981\u52a0\u5bc6\/\u89e3\u5bc6\u7684\u4e0b\u4e00\u500b\u6d88\u606f\u5b57\u7bc0\u9032\u884c\u7570\u6216\uff08XOR\uff09\u904b\u7b97\uff1a<\/li>\n<\/ul>\n\n\n\n
      i= j = 0 \nfor each message byte Mi\n   i= (i+ 1) mod 256\n   j = (j + S(i)) mod 256\n   swap(S(i), S(j)) \/\/keep shuffling \n   S()t = (S(i) + S(j)) mod 256\n   Ci= Mi\u2295S(t)<\/code><\/pre>\n\n\n\n
      RC4 \u7684\u5b89\u5168\u6027\uff1a<\/p>\n\n\n\n
        \n
      • \u8072\u7a31\u5c0d\u5df2\u77e5\u653b\u64ca\u5b89\u5168\uff08\u6709\u4e00\u4e9b\u5206\u6790\uff0c\u6c92\u6709\u5be6\u8e10\uff09\u3002<\/li>\n\n\n\n
      • \u7d50\u679c\u662f\u975e\u5e38\u975e\u7dda\u6027\u7684\u3002<\/li>\n\n\n\n
      • \u7531\u65bc RC4 \u662f\u4e00\u7a2e\u4e32\u6d41\u52a0\u5bc6\u6cd5\uff0c\u7d55\u4e0d\u80fd\u91cd\u8907\u4f7f\u7528\u5bc6\u9470\u3002<\/li>\n\n\n\n
      • \u5c0d WEP \u6709\u7591\u616e\uff0c\u4f46\u9019\u90e8\u5206\u7531\u5bc6\u9470\u8655\u7406\u800c\u4e0d\u662f RC4 \u672c\u8eab\u3002<\/li>\n<\/ul>\n\n\n\n
        Block Ciphers<\/h2>\n\n\n\n
        \u660e\u6587\u5340\u584a\u88ab\u8996\u70ba\u4e00\u500b\u6574\u9ad4\uff0c\u7528\u65bc\u751f\u6210\u7b49\u9577\uff0864 \/ 128 \u4f4d\uff09\u7684\u5bc6\u6587\u5340\u584a\u3002<\/p>\n\n\n\n
        \u5bc6\u9470\u9577\u5ea6\/\u5340\u584a\u5927\u5c0f\/\u8f2a\u6578\u53ef\u8b8a\u3002<\/p>\n\n\n\n
        \u6df7\u5408\u904b\u7b97\u7b26\uff0c\u6578\u64da\u3002<\/p>\n\n\n\n
        \"\"\/<\/figure>\n\n\n\n
        \u8cbb\u65af\u59a5\u5bc6\u78bc\uff08Feistel cipher\uff09<\/strong> \u662f\u4e00\u7a2e\u7528\u65bc\u69cb\u9020 Block Ciphers \u7684\u5c0d\u7a31\u7d50\u69cb\uff0c\u4ee5 Horst Feistel \u547d\u540d\u3002<\/p>\n\n\n\n
        Feistel \u63d0\u51fa\u6211\u5011\u53ef\u4ee5\u5229\u7528\u4e58\u7a4d\u5bc6\u78bc\u7684\u6982\u5ff5\u4f86\u903c\u8fd1\u7406\u60f3\u7684\u5206\u7d44\u5bc6\u78bc\uff0c\u5373\u4f9d\u6b21\u57f7\u884c\u5169\u500b\u6216\u591a\u500b\u7c21\u55ae\u5bc6\u78bc\u3002<\/p>\n\n\n\n
        \u66ff\u4ee3\uff1a\u6bcf\u500b\u660e\u6587\u5143\u7d20\u6216\u5143\u7d20\u7d44\u552f\u4e00\u5730\u88ab\u76f8\u61c9\u7684\u5bc6\u6587\u5143\u7d20\u6216\u5143\u7d20\u7d44\u66ff\u63db\u3002<\/p>\n\n\n\n
        \u6392\u5217\uff1a\u660e\u6587\u5143\u7d20\u7684\u5e8f\u5217\u88ab\u8a72\u5e8f\u5217\u7684\u4e0d\u540c\u6392\u5217\u66ff\u63db\u3002 \u4e5f\u5c31\u662f\u8aaa\uff0c\u5e8f\u5217\u4e2d\u6c92\u6709\u5143\u7d20\u88ab\u6dfb\u52a0\u3001\u522a\u9664\u6216\u66ff\u63db\uff0c\u800c\u662f\u5143\u7d20\u5728\u5e8f\u5217\u4e2d\u51fa\u73fe\u7684\u9806\u5e8f\u767c\u751f\u4e86\u8b8a\u5316\u3002<\/p>\n\n\n\n
        Feistel \u52a0\u89e3\u5bc6\uff1a<\/p>\n\n\n\n
        \"\"\/<\/figure>\n\n\n\n
        \u6578\u64da\u52a0\u5bc6\u6a19\u6e96<\/strong> Data Encryption Standard (DES):<\/strong><\/p>\n\n\n\n
        \u4e00\u7a2e\u7528\u65bc\u52a0\u5bc6\u6578\u5b57\u6578\u64da\u7684\u5c0d\u7a31\u5bc6\u9470\u7b97\u6cd5\uff0c\u65bc 1970 \u5e74\u4ee3\u521d\u5728 IBM \u958b\u767c\u3002\u5118\u7ba1\u5176 56 bits \u7684\u77ed\u5bc6\u9470\u9577\u5ea6\u4f7f\u5176\u5c0d\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\u592a\u4e0d\u5b89\u5168\uff0c\u5b83\u5c0d\u5bc6\u78bc\u5b78\u7684\u9032\u6b65\u7522\u751f\u4e86\u5f88\u5927\u7684\u5f71\u97ff\u3002<\/p>\n\n\n\n
        Key size \u2013 56 bits; Block size \u2013 64 bits<\/p>\n\n\n\n
        DES \u7b97\u6cd5\uff1a<\/p>\n\n\n\n
        \"\"\/<\/figure>\n\n\n\n
        DES \u52a0\u5bc6\uff1a<\/p>\n\n\n\n
        \"\"\/<\/figure>\n\n\n\n
        Electronic Codebook (ECB):<\/strong><\/p>\n\n\n\n
        \u6d88\u606f\u88ab\u5206\u6210\u7368\u7acb\u7684\u5340\u584a\uff0c\u9019\u4e9b\u5340\u584a\u88ab\u52a0\u5bc6\u3002\u6bcf\u500b\u5340\u584a\u90fd\u662f\u4e00\u500b\u88ab\u66ff\u63db\u7684\u503c\uff0c\u5c31\u50cf\u4e00\u500b\u5bc6\u78bc\u672c\uff0c\u56e0\u6b64\u5f97\u540d\u3002\u6bcf\u500b\u5340\u584a\u90fd\u7368\u7acb\u65bc\u6240\u6709\u5176\u4ed6\u5340\u584a\u3002<\/p>\n\n\n\n
        Ci = De (Pi, K1)<\/strong><\/p>\n\n\n\n
        \"\"\/<\/figure>\n\n\n\n
        ECB \u7684\u512a\u52a3\uff1a<\/p>\n\n\n\n
          \n
        • \u91cd\u8907\u7684\u6d88\u606f\u53ef\u4ee5\u53cd\u6620\u5728\u5bc6\u6587\u4e2d\u3002<\/li>\n\n\n\n
        • \u5982\u679c\u8207\u6d88\u606f\u5340\u584a\u5c0d\u9f4a\uff0c\u7279\u5225\u662f\u8207\u5716\u5f62\u7b49\u6578\u64da\u6216\u8b8a\u5316\u5f88\u5c0f\u7684\u6d88\u606f\u5c0d\u9f4a\uff0c\u9019\u5c07\u9020\u6210\u5bc6\u78bc\u66f8\u5206\u6790\u554f\u984c\u3002<\/li>\n\n\n\n
        • \u52a0\u5bc6\u6d88\u606f\u5340\u584a\u662f\u7368\u7acb\u7684\uff0c\u9019\u662f\u4e00\u500b\u5f31\u9ede\u3002<\/li>\n\n\n\n
        • \u56e0\u6b64\u53ea\u6709\u771f\u6b63\u767c\u9001\u5e7e\u500b\u6578\u64da\u5340\u584a\u6642\u5f88\u6709\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
          Cipher Block Chaining (CBC):<\/strong><\/p>\n\n\n\n
          \u6d88\u606f\u88ab\u5206\u6210\u591a\u500b\u5340\u584a\uff0c\u4f46\u5b83\u5011\u5728\u52a0\u5bc6\u64cd\u4f5c\u4e2d\u662f\u806f\u7e6b\u5728\u4e00\u8d77\u7684\u3002\u5bc6\u78bc\u5340\u584a\u8207\u660e\u6587\u93c8\u63a5\uff0c\u56e0\u6b64\u5f97\u540d\u3002<\/p>\n\n\n\n
          \u4f7f\u7528\u5df2\u77e5\u7684\u521d\u59cb\u5411\u91cf (IV) \u958b\u59cb\u6d41\u7a0b\uff1a<\/p>\n\n\n\n
            \n
          • Ci= En (Pi\u2295Ci-1, K1)<\/strong><\/li>\n\n\n\n
          • C0= IV<\/strong><\/li>\n<\/ul>\n\n\n\n
            \"\"\/<\/figure>\n\n\n\n
            CBC \u7684\u512a\u52a3\uff1a<\/p>\n\n\n\n
              \n
            • \u6bcf\u500b\u5bc6\u6587\u5340\u584a\u4f9d\u8cf4\u65bc\u5b83\u4e4b\u524d\u7684\u6240\u6709\u6d88\u606f\u5340\u584a\u3002<\/li>\n\n\n\n
            • \u6700\u5e38\u898b\u7684\u4f7f\u7528\u6a21\u5f0f\uff0c\u6d88\u606f\u7684\u66f4\u6539\u6703\u5f71\u97ff\u5bc6\u6587\u5340\u584a\u4ee5\u53ca\u539f\u59cb\u5340\u584a\u3002<\/li>\n\n\n\n
            • \u70ba\u4e86\u958b\u59cb\u6d41\u7a0b\uff0c\u9700\u8981\u4e00\u500b\u521d\u59cb\u503c (IV)\uff0c\u767c\u9001\u65b9\u548c\u63a5\u6536\u65b9\u90fd\u5fc5\u9808\u77e5\u9053\u5b83\uff0cIV \u5fc5\u9808\u662f\u4e00\u500b\u56fa\u5b9a\u503c\uff0c\u6216\u8005\u5b83\u53ef\u4ee5\u5728\u6d88\u606f\u7684\u5176\u9918\u90e8\u5206\u4e4b\u524d\u4ee5 ECB \u6a21\u5f0f\u52a0\u5bc6\u767c\u9001\u3002<\/li>\n\n\n\n
            • \u5728\u6d88\u606f\u7684\u6700\u5f8c\uff0c\u5fc5\u9808\u8655\u7406\u4e00\u500b\u53ef\u80fd\u51fa\u73fe\u7684\u6700\u5f8c\u4e00\u500b\u77ed\u5340\u584a\uff1a\u7528 pad \u586b\u5145\u6700\u5f8c\u4e00\u500b\u5340\u584a\uff08\u901a\u5e38\u5e36\u6709\u586b\u5145\u5927\u5c0f\u7684\u8a08\u6578\uff09\uff0cEg. [b1 b2 b3 0 0 0 0 5] \u27943 data bytes and 5 bytes pad+count<\/li>\n<\/ul>\n\n\n\n
              Cipher Feedback (CFB):<\/strong><\/p>\n\n\n\n
              \u6d88\u606f\u88ab\u8996\u70ba\u6dfb\u52a0\u5230\u5206\u7d44\u5bc6\u78bc\u8f38\u51fa\u7684\u6bd4\u7279\u6d41\uff0c\u7d50\u679c\u662f\u4e0b\u4e00\u968e\u6bb5\u7684\u53cd\u994b\uff08\u56e0\u6b64\u5f97\u540d\uff09\u3002\u6a19\u51c6\u5141\u8a31\u53cd\u994b\u4efb\u610f\u6578\u91cf\u7684 bit\uff081\u30018 \u6216 64 \u6216\u5176\u4ed6\uff09\uff0c\u8868\u793a\u70ba CFB-1\u3001CFB-8\u3001CFB-64 \u7b49\u3002<\/p>\n\n\n\n
              \u5728\u5be6\u8e10\u4e2d\uff0c\u5229\u7528\u6240\u6709 64 \u4f4d\u662f\u6700\u6709\u6548\u7684\uff0c\u7a31\u4e4b\u70ba CFB-64\uff1a<\/p>\n\n\n\n
                \n
              • Ci= Pi\u2295Sig(En(Pi, K1))<\/strong><\/li>\n\n\n\n
              • C0= IV<\/strong><\/li>\n<\/ul>\n\n\n\n
                \"\"\/<\/figure>\n\n\n\n
                CFB \u7684\u512a\u52a3\uff1a<\/p>\n\n\n\n
                  \n
                • \u7576\u6578\u64da\u56fa\u6709\u5730\u4ee5\u4f4d\/\u5b57\u7bc0\u5230\u9054\u6642\u9069\u7528\u3002<\/li>\n\n\n\n
                • \u6700\u5e38\u898b\u7684\u6d41\u6a21\u5f0f\u3002<\/li>\n\n\n\n
                • \u5206\u7d44\u5bc6\u78bc\u5728\u5169\u7aef\u90fd\u7528\u65bc\u52a0\u5bc6\u6a21\u5f0f\u3002<\/li>\n\n\n\n
                • \u932f\u8aa4\u5728\u767c\u751f\u4e4b\u5f8c\u4ecd\u50b3\u64ad\u4e86\u5e7e\u500b\u5340\u584a\u3002<\/li>\n<\/ul>\n\n\n\n
                  Output Feedback (OFB):<\/strong><\/p>\n\n\n\n
                  \u6d88\u606f\u88ab\u8996\u70ba\u6bd4\u7279\u6d41\uff0c\u5206\u7d44\u5bc6\u78bc\u7684\u8f38\u51fa\u88ab\u6dfb\u52a0\u5230\u6d88\u606f\u4e2d\uff0c \u7136\u5f8c\u53cd\u994b\uff08\u56e0\u6b64\u5f97\u540d\uff09\u8f38\u51fa\uff0c\u56e0\u6b64\u53cd\u994b\u8207\u6d88\u606f\u7121\u95dc\u3002<\/p>\n\n\n\n
                  \u53ef\u4ee5\u63d0\u524d\u8a08\u7b97\uff1a<\/p>\n\n\n\n
                    \n
                  • Ci= Pi\u2295Oi<\/strong><\/li>\n\n\n\n
                  • Oi= Si( En(Oi-1, K1))<\/strong><\/li>\n\n\n\n
                  • O0= IV<\/strong><\/li>\n<\/ul>\n\n\n\n
                    \"\"\/<\/figure>\n\n\n\n
                    OFB \u7684\u512a\u52a3\uff1a<\/p>\n\n\n\n
                      \n
                    • \u7528\u65bc\u932f\u8aa4\u53cd\u994b\u6709\u554f\u984c\u7684\u5730\u65b9\u3002<\/li>\n\n\n\n
                    • \u6c92\u6709\u932f\u8aa4\u50b3\u64ad\uff0c\u6216\u8005\u5728\u6d88\u606f\u53ef\u7528\u4e4b\u524d\u5fc5\u9808\u9032\u884c\u52a0\u5bc6\u3002<\/li>\n\n\n\n
                    • \u8207 CFB \u985e\u4f3c\uff0c\u4f46\u53cd\u994b\u4f86\u81ea\u5206\u7d44\u5bc6\u78bc\u7684\u8f38\u51fa\uff0c\u4e26\u4e14\u8207\u6d88\u606f\u7121\u95dc\u3002<\/li>\n\n\n\n
                    • \u6c38\u9060\u4e0d\u8981\u91cd\u8907\u4f7f\u7528\u76f8\u540c\u7684\u5e8f\u5217\uff08key + IV\uff09\uff0c\u767c\u9001\u8005\u548c\u63a5\u6536\u8005\u5fc5\u9808\u4fdd\u6301\u540c\u6b65\uff0c\u4e26\u4e14\u9700\u8981\u4e00\u4e9b\u6062\u5fa9\u65b9\u6cd5\u4f86\u78ba\u4fdd\u9019\u7a2e\u60c5\u6cc1\u767c\u751f\u3002<\/li>\n\n\n\n
                    • \u96d6\u7136\u6700\u521d\u5728\u6a19\u6e96\u4e2d\u6307\u5b9a\u4e86 m-bit \u7684\u53cd\u994b\uff0c\u4f46\u96a8\u5f8c\u7684\u7814\u7a76\u8868\u660e\uff0c\u61c9\u8a72\u53ea\u4f7f\u7528 64 \u4f4d OFB\uff0c\u9019\u662f\u6700\u6709\u6548\u7684\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n
                      <\/p>\n","protected":false},"excerpt":{"rendered":"
                      Block Ciphers \u53ef\u4ee5\u8b6f\u4f5c\u5206\u7d44\u52a0\u5bc6\u6216\u8005\u5206\u584a\u52a0\u5bc6\u3002 \u5e38\u7528 Block Ciphers \u76f8\u63d0\u4e26\u8ad6\u7684\u52a0\u5bc6\u65b9\u5f0f\u662f Stream Ciphers\uff0c\u53ef\u8b6f\u4f5c\u4e32\u6d41\u52a0\u5bc6\u6cd5\u3002\u5169\u8005\u90fd\u662f\u66ff\u63db\u5f0f\u5bc6\u78bc\uff08Substitution ciphers\uff09\uff0c\u90fd\u61c9\u7528\u4e86\u53ef\u9006\u6620\u5c04\uff08reversible mapping\uff09\uff1a Stream Ciphers \u4e32\u6d41\u52a0\u5bc6\u6cd5\u662f\u4e00\u7a2e\u5c0d\u7a31\u5bc6\u9470\u5bc6\u78bc\uff0c\u5176\u4e2d\u660e\u6587\u6578\u5b57\u8207\u507d\u96a8\u6a5f\u5bc6\u78bc\u6578\u5b57\u6d41\uff08\u5bc6\u9470\u6d41\uff09\u76f8\u7d50\u5408\u3002\u5728\u5be6\u8e10\u4e2d\uff0c\u4e00\u500b\u6578\u5b57\u901a\u5e38\u662f\u4e00\u500b bit\uff0c\u8207\u7570\u6216 \uff08XOR\uff09\u7d44\u5408\u64cd\u4f5c\uff0c\u628a\u660e\u6587\u8a0a\u606f\u9010\u500b bit \u8f49\u63db\u6210\u5bc6\u6587\u3002 \u5178\u578b\u7684 Stream Ciphers \u662f\u81ea\u52d5\u52a0\u5bc6\u7684 Vigen\u00e8re \u5bc6\u78bc\u548c Vernam \u5bc6\u78bc\u3002 \u8f03\u6709\u540d\u7684 Stream Ciphers \u662f RC4\u3002 RC4 RSA DSI \u64c1\u6709\u7684\u5c08\u6709\u5bc6\u78bc\uff0c\u7531 Ron Rivest \u8a2d\u8a08\uff0c\u7c21\u55ae\u4f46\u6709\u6548\u3002\u5bc6\u9470\u5927\u5c0f\u53ef\u8b8a\uff0c\u662f\u4e00\u7a2e\u9762\u5411\u5b57\u7bc0\u7684\u4e32\u6d41\u52a0\u5bc6\u6cd5\u3002\u5728 SSL\/TLS\u3001\u7121\u7dda WEP \u4e2d\u5ee3\u6cdb\u4f7f\u7528\u3002\u5bc6\u9470\u5f62\u6210\u6240\u6709 8-bit \u7684\u96a8\u6a5f\u6392\u5217\uff0c\u4f7f\u7528\u8a72\u6392\u5217\u4f86\u6253\u4e82\u8f38\u5165\u4fe1\u606f\uff0c\u4e00\u6b21\u8655\u7406\u4e00\u500b\u5b57\u7bc0\u3002 RC4 Key Schedule: RC4 \u52a0\u89e3\u5bc6\uff1a RC4 \u7684\u5b89\u5168\u6027\uff1a Block Ciphers \u660e\u6587\u5340\u584a\u88ab\u8996\u70ba\u4e00\u500b\u6574\u9ad4\uff0c\u7528\u65bc\u751f\u6210\u7b49\u9577\uff0864 \/ 128 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,2],"tags":[143,34,144,87],"class_list":["post-2065","post","type-post","status-publish","format-standard","hentry","category-23","category-all","tag-block-ciphers","tag-cryptography","tag-stream-ciphers","tag-87"],"_links":{"self":[{"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=\/wp\/v2\/posts\/2065","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2065"}],"version-history":[{"count":6,"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=\/wp\/v2\/posts\/2065\/revisions"}],"predecessor-version":[{"id":2755,"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=\/wp\/v2\/posts\/2065\/revisions\/2755"}],"wp:attachment":[{"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2065"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2065"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zttofficial.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2065"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}