{"id":477294,"date":"2023-08-09T09:10:23","date_gmt":"2023-08-09T09:10:23","guid":{"rendered":""},"modified":"2023-09-05T11:14:25","modified_gmt":"2023-09-05T11:14:25","slug":"four-way-handshake","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/four-way-handshake\/","title":{"rendered":"4\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af"},"content":{"rendered":"<p>4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf \u30cd\u30c3\u30c8\u30ef\u30fc\u30af (\u901a\u5e38\u306f\u30ef\u30a4\u30e4\u30ec\u30b9 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af) \u9593\u3067\u30c7\u30d0\u30a4\u30b9\u9593\u306e\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u91cd\u8981\u306a\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 (\u30e9\u30c3\u30d7\u30c8\u30c3\u30d7\u3084\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u306a\u3069\u306e\u30c7\u30d0\u30a4\u30b9) \u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8 (Wi-Fi \u30eb\u30fc\u30bf\u30fc\u306a\u3069) \u306e\u4e21\u65b9\u304c\u5b89\u5168\u306a\u901a\u4fe1\u306e\u305f\u3081\u306e\u6b63\u3057\u3044\u8cc7\u683c\u60c5\u5831\u3092\u6301\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af \u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3092\u9632\u6b62\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u30c7\u30fc\u30bf\u9001\u4fe1\u3092\u4fdd\u8b77\u3059\u308b\u4e0a\u3067\u57fa\u672c\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<h2>4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u8d77\u6e90\u3068\u305d\u306e\u6700\u521d\u306e\u8a00\u53ca\u306e\u6b74\u53f2\u3002<\/h2>\n<p>4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u6982\u5ff5\u306f\u3001Wi-Fi \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5b9a\u7fa9\u3059\u308b IEEE 802.11 \u6a19\u6e96\u306e 802.11i \u4fee\u6b63\u3067\u521d\u3081\u3066\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002 IEEE 802.11i \u4fee\u6b63\u6848\u306f\u3001\u4ee5\u524d\u306e WEP (Wired Equivalent Privacy) \u304a\u3088\u3073 WPA (Wi-Fi Protected Access) \u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u5b58\u5728\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8106\u5f31\u6027\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306b 2004 \u5e74\u306b\u767a\u884c\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h2>4\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u8a73\u7d30\u60c5\u5831\u3002\u30c8\u30d4\u30c3\u30af\u306e\u5c55\u958b 4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3002<\/h2>\n<p>4 \u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306f\u3001\u73fe\u5728 Wi-Fi \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b WPA2 (Wi-Fi Protected Access 2) \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4e0d\u53ef\u6b20\u306a\u90e8\u5206\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30c7\u30d0\u30a4\u30b9\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306e\u9593\u306b\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u6bb5\u968e\u7684\u306b\u78ba\u7acb\u3057\u3001\u30c7\u30fc\u30bf\u9001\u4fe1\u304c\u958b\u59cb\u3055\u308c\u308b\u524d\u306b\u53cc\u65b9\u304c\u6b63\u3057\u3044\u6697\u53f7\u5316\u30ad\u30fc\u3092\u6240\u6709\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>4\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u5185\u90e8\u69cb\u9020\u3002 4 \u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u4ed5\u7d44\u307f\u3002<\/h2>\n<p>4 \u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306b\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u9593\u3067\u4ea4\u63db\u3055\u308c\u308b 4 \u3064\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>\u30e1\u30c3\u30bb\u30fc\u30b8 1 \u2013 \u30ea\u30af\u30a8\u30b9\u30c8 (M1)<\/strong>: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u53c2\u52a0\u3059\u308b\u610f\u56f3\u3092\u793a\u3059\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3092\u958b\u59cb\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30e1\u30c3\u30bb\u30fc\u30b8 2 \u2013 \u5fdc\u7b54 (M2)<\/strong>: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u8981\u6c42\u306b\u5fdc\u3058\u3066\u3001\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306f\u3001\u30ca\u30f3\u30b9 (\u4e71\u6570) \u3084\u30b0\u30eb\u30fc\u30d7 \u30ad\u30fc\u306a\u3069\u306e\u91cd\u8981\u306a\u60c5\u5831\u3092\u542b\u3080\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30e1\u30c3\u30bb\u30fc\u30b8 3 \u2013 \u30ea\u30af\u30a8\u30b9\u30c8 (M3)<\/strong>: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3001\u4e8b\u524d\u5171\u6709\u30ad\u30fc (PSK) \u3068\u30ce\u30f3\u30b9\u304b\u3089\u6d3e\u751f\u3057\u305f\u30da\u30a2\u30ef\u30a4\u30ba\u4e00\u6642\u30ad\u30fc (PTK) \u3092\u4f7f\u7528\u3057\u3066\u6697\u53f7\u5316\u3055\u308c\u305f\u30ce\u30f3\u30b9\u3068\u8ffd\u52a0\u30c7\u30fc\u30bf\u3092\u542b\u3080\u5225\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306b\u5fdc\u7b54\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30e1\u30c3\u30bb\u30fc\u30b8 4 \u2013 \u5fdc\u7b54 (M4)<\/strong>\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306f\u3001PTK \u3092\u4f7f\u7528\u3057\u3066\u6697\u53f7\u5316\u3055\u308c\u305f nonce \u3068\u8ffd\u52a0\u30c7\u30fc\u30bf\u3092\u542b\u3080\u6700\u7d42\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u3066\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u8981\u6c42\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u3053\u306e\u4ea4\u63db\u306e\u5f8c\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306e\u4e21\u65b9\u304c\u4e92\u3044\u306e\u8cc7\u683c\u60c5\u5831\u3092\u691c\u8a3c\u3057\u3001PTK \u304c\u78ba\u7acb\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30ad\u30fc\u306f\u30012 \u8005\u9593\u3067\u9001\u4fe1\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306b\u4f7f\u7528\u3055\u308c\u3001\u5b89\u5168\u306a\u901a\u4fe1\u30c1\u30e3\u30cd\u30eb\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u4e3b\u306a\u6a5f\u80fd\u306e\u5206\u6790\u3002<\/h2>\n<p>4 \u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306f\u3001\u5b89\u5168\u306a\u901a\u4fe1\u306b\u5fc5\u8981\u306a\u3044\u304f\u3064\u304b\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>\u76f8\u4e92\u8a8d\u8a3c<\/strong>: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306f\u4e21\u65b9\u3068\u3082\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af \u30d7\u30ed\u30bb\u30b9\u4e2d\u306b\u4e92\u3044\u306e ID \u3068\u8cc7\u683c\u60c5\u5831\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u52d5\u7684\u30ad\u30fc\u306e\u751f\u6210<\/strong>\uff1a\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306b\u3088\u308a\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306e\u30da\u30a2\u3054\u3068\u306b\u4e00\u610f\u306e PTK \u304c\u751f\u6210\u3055\u308c\u308b\u305f\u3081\u3001\u653b\u6483\u8005\u304c\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u5834\u5408\u3067\u3082\u901a\u4fe1\u3092\u89e3\u8aad\u3059\u308b\u3053\u3068\u304c\u56f0\u96e3\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u65b0\u9bae\u306a\u30ca\u30f3\u30b9<\/strong>: \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3067\u4f7f\u7528\u3055\u308c\u308b nonce \u306f\u30e9\u30f3\u30c0\u30e0\u3067\u3042\u308a\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u3054\u3068\u306b\u4e00\u610f\u3067\u3042\u308b\u305f\u3081\u3001\u30ea\u30d7\u30ec\u30a4\u653b\u6483\u3092\u9632\u6b62\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u524d\u65b9\u6a5f\u5bc6\u6027<\/strong>: \u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306b\u4f7f\u7528\u3055\u308c\u308b PTK \u306f\u3001PSK \u304b\u3089\u76f4\u63a5\u5c0e\u51fa\u3055\u308c\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u4e2d\u306b\u4ea4\u63db\u3055\u308c\u308b\u30ca\u30f3\u30b9\u304b\u3089\u5c0e\u51fa\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u3088\u308a\u30011 \u3064\u306e PTK \u304c\u4fb5\u5bb3\u3055\u308c\u3066\u3082\u3001\u904e\u53bb\u307e\u305f\u306f\u5c06\u6765\u306e\u901a\u4fe1\u304c\u4fb5\u5bb3\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u3069\u306e\u3088\u3046\u306a\u30bf\u30a4\u30d7\u306e 4 \u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u304c\u5b58\u5728\u3059\u308b\u304b\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002\u8868\u3068\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u3066\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/h2>\n<p>\u901a\u5e38\u30014 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306f 1 \u7a2e\u985e\u3060\u3051\u3042\u308a\u3001WPA2-PSK (\u4e8b\u524d\u5171\u6709\u30ad\u30fc) \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u4f7f\u7528\u3055\u308c\u308b\u6697\u53f7\u5316\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u3088\u3063\u3066\u306f\u3001\u30ad\u30fc\u306e\u5c0e\u51fa\u65b9\u6cd5\u304c\u82e5\u5e72\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><strong>4\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u7a2e\u985e<\/strong>:<\/p>\n<ul>\n<li>WPA2-PSK: \u30db\u30fc\u30e0\u304a\u3088\u3073\u5c0f\u898f\u6a21\u30aa\u30d5\u30a3\u30b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u4f7f\u7528\u3055\u308c\u3001\u8a8d\u8a3c\u306b\u4e8b\u524d\u5171\u6709\u30ad\u30fc (\u30d1\u30b9\u30ef\u30fc\u30c9) \u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<li>WPA2-Enterprise: \u5927\u898f\u6a21\u306a\u7d44\u7e54\u3067\u4f7f\u7528\u3055\u308c\u3001\u8a8d\u8a3c\u30b5\u30fc\u30d0\u30fc (RADIUS \u306a\u3069) \u304c\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>4\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u4f7f\u3044\u65b9\u3068\u4f7f\u7528\u4e0a\u306e\u554f\u984c\u70b9\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3002<\/h2>\n<h3>4 \u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u4f7f\u7528\u65b9\u6cd5:<\/h3>\n<ol>\n<li>\n<p><strong>Wi-Fi \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4fdd\u8b77<\/strong>: 4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u4e3b\u306a\u76ee\u7684\u306f\u3001Wi-Fi \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u306e\u9593\u306b\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>IoT\u30c7\u30d0\u30a4\u30b9\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/strong>: 4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306f\u3001\u30e2\u30ce\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 (IoT) \u30c7\u30d0\u30a4\u30b9\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u9593\u306e\u901a\u4fe1\u3092\u4fdd\u8b77\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3068\u6a5f\u5bc6\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u3082\u9069\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h3>\u554f\u984c\u3068\u89e3\u6c7a\u7b56:<\/h3>\n<ol>\n<li>\n<p><strong>\u8f9e\u66f8\u653b\u6483<\/strong>: \u653b\u6483\u8005\u306f\u3001PSK \u3092\u7dcf\u5f53\u305f\u308a\u653b\u6483\u3057\u3066 Wi-Fi \u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u89e3\u8aad\u3057\u3088\u3046\u3068\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u8efd\u6e1b\u3059\u308b\u306b\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u8f9e\u66f8\u653b\u6483\u306b\u8010\u3048\u3089\u308c\u308b\u5f37\u529b\u3067\u8907\u96d1\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>WPA2\u306e\u8106\u5f31\u6027<\/strong>: WPA2 \u306f\u4e00\u822c\u306b\u5b89\u5168\u3067\u3059\u304c\u3001\u904e\u53bb\u306b\u306f\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u5f31\u70b9\u3092\u60aa\u7528\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u8106\u5f31\u6027 (KRACK \u653b\u6483\u306a\u3069) \u304c\u3042\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u3088\u3046\u306a\u8106\u5f31\u6027\u306b\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3059\u308b\u306b\u306f\u3001\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8 \u30c7\u30d0\u30a4\u30b9\u306e\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3092\u5b9a\u671f\u7684\u306b\u66f4\u65b0\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30ea\u30d7\u30ec\u30a4\u653b\u6483<\/strong>\uff1a\u653b\u6483\u8005\u306f\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u518d\u751f\u3057\u3088\u3046\u3068\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u65b0\u3057\u3044\u30ce\u30f3\u30b9\u306e\u4f7f\u7528\u3068\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u9069\u5207\u306a\u5b9f\u88c5\u306f\u3001\u30ea\u30d7\u30ec\u30a4\u653b\u6483\u306e\u9632\u6b62\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u4e3b\u306a\u7279\u5fb4\u3084\u305d\u306e\u4ed6\u306e\u985e\u4f3c\u7528\u8a9e\u3068\u306e\u6bd4\u8f03\u3092\u8868\u3084\u30ea\u30b9\u30c8\u306e\u5f62\u5f0f\u3067\u793a\u3057\u307e\u3059\u3002<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u7279\u6027<\/th>\n<th>4\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af<\/th>\n<th>\u30b9\u30ea\u30fc\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af<\/th>\n<th>\u53cc\u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4ea4\u63db\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6570<\/td>\n<td>4<\/td>\n<td>3<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>\u76f8\u4e92\u8a8d\u8a3c<\/td>\n<td>\u306f\u3044<\/td>\n<td>\u306f\u3044<\/td>\n<td>\u3044\u3044\u3048<\/td>\n<\/tr>\n<tr>\n<td>\u52d5\u7684\u30ad\u30fc\u306e\u751f\u6210<\/td>\n<td>\u306f\u3044<\/td>\n<td>\u3044\u3044\u3048<\/td>\n<td>\u3044\u3044\u3048<\/td>\n<\/tr>\n<tr>\n<td>\u4e00\u822c\u7684\u306a\u4f7f\u7528\u4f8b<\/td>\n<td>Wi-Fi\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/td>\n<td>TCP\u63a5\u7d9a<\/td>\n<td>\u30b7\u30f3\u30d7\u30eb\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u30f3\u30b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306b\u95a2\u9023\u3059\u308b\u5c06\u6765\u306e\u5c55\u671b\u3068\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3002<\/h2>\n<p>Wi-Fi \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u57fa\u672c\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30e1\u30ab\u30cb\u30ba\u30e0\u3068\u3057\u3066\u306e 4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306f\u3001\u4eca\u5f8c\u3082\u5c06\u6765\u306e\u7121\u7dda\u901a\u4fe1\u30c6\u30af\u30ce\u30ed\u30b8\u306e\u91cd\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3042\u308a\u7d9a\u3051\u308b\u3067\u3057\u3087\u3046\u3002\u305f\u3060\u3057\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3057\u3001\u65b0\u305f\u306a\u8105\u5a01\u306b\u5bfe\u3059\u308b\u8010\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u3001\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u8a8d\u8a3c\u65b9\u6cd5\u306e\u9032\u6b69\u304c\u7d44\u307f\u8fbc\u307e\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3092 4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3067\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3001\u307e\u305f\u306f 4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306b\u95a2\u9023\u4ed8\u3051\u308b\u65b9\u6cd5\u3002<\/h2>\n<p>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u306e\u9593\u306e\u4ef2\u4ecb\u8005\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001\u8ffd\u52a0\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5c64\u3068\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u5c64\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001Wi-Fi \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u9593\u306e 4 \u65b9\u5411\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af \u30d7\u30ed\u30bb\u30b9\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u305b\u3093\u304c\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3059\u308b\u3068\u3001\u3055\u307e\u3056\u307e\u306a\u65b9\u6cd5\u3067\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u8ee2\u9001<\/strong>: \u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u306e\u9593\u3067\u9001\u4fe1\u3055\u308c\u308b\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u30014 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306b\u3088\u3063\u3066\u63d0\u4f9b\u3055\u308c\u308b\u6697\u53f7\u5316\u3092\u88dc\u5b8c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u533f\u540d\u6027\u3068\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc<\/strong>: \u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30a2\u30af\u30bb\u30b9 \u30dd\u30a4\u30f3\u30c8\u3084\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e IP \u30a2\u30c9\u30ec\u30b9\u3092\u96a0\u3059\u3053\u3068\u304c\u3067\u304d\u3001\u901a\u4fe1\u4e2d\u306e\u533f\u540d\u6027\u3068\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u5f37\u5316\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/strong>: \u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u3066\u30d6\u30ed\u30c3\u30af\u3057\u3001\u6f5c\u5728\u7684\u306a\u653b\u6483\u3092\u9632\u3050\u305f\u3081\u306e\u8ffd\u52a0\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5c64\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<p>4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/ieeexplore.ieee.org\/standard\/9426962\" target=\"_new\" rel=\"noopener nofollow\">IEEE 802.11\u898f\u683c<\/a><\/li>\n<li><a href=\"https:\/\/www.wi-fi.org\/\" target=\"_new\" rel=\"noopener nofollow\">Wi-Fi \u30a2\u30e9\u30a4\u30a2\u30f3\u30b9<\/a><\/li>\n<li><a href=\"https:\/\/www.wi-fi.org\/security\/wpa2\" target=\"_new\" rel=\"noopener nofollow\">WPA2 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u6982\u8981<\/a><\/li>\n<\/ul>\n<p>4 \u30a6\u30a7\u30a4 \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u6271\u3046\u3059\u3079\u3066\u306e\u4eba\u306b\u3068\u3063\u3066\u975e\u5e38\u306b\u91cd\u8981\u3067\u3042\u308a\u3001\u3053\u308c\u3092\u6b63\u3057\u304f\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001Wi-Fi \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7d4c\u7531\u3067\u9001\u4fe1\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u6a5f\u5bc6\u6027\u3068\u6574\u5408\u6027\u304c\u78ba\u4fdd\u3055\u308c\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>","protected":false},"featured_media":477295,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477294","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Four-way handshake: Ensuring Secure Communication in Computer Networks<\/mark>","faq_items":[{"question":"What is the Four-way handshake, and why is it important for Wi-Fi networks?","answer":"<p>The Four-way handshake is a process used in Wi-Fi networks to establish a secure connection between a client device (e.g., laptop, smartphone) and an access point (e.g., Wi-Fi router). It ensures mutual authentication and dynamic key generation, making it essential for securing data transmission and preventing unauthorized access.<\/p>"},{"question":"How does the Four-way handshake work?","answer":"<p>The Four-way handshake involves four messages exchanged between the client and the access point. First, the client sends a request to join the network, and the access point responds with important information, including a nonce and a group key. The client then sends another request, including its nonce and encrypted data. Finally, the access point acknowledges the client's request, and both parties establish a unique Pairwise Transient Key (PTK) for secure communication.<\/p>"},{"question":"What are the key features of the Four-way handshake?","answer":"<p>The Four-way handshake provides mutual authentication, dynamic key generation, fresh nonces for preventing replay attacks, and forward secrecy. These features ensure a secure and resilient communication channel between the client and the access point.<\/p>"},{"question":"Are there different types of Four-way handshakes?","answer":"<p>Typically, there is only one type of Four-way handshake used in Wi-Fi networks, which is WPA2-PSK. However, variations may exist based on the encryption protocol used, such as WPA2-Enterprise for larger organizations with authentication servers.<\/p>"},{"question":"How can Four-way handshake be used with proxy servers?","answer":"<p>Proxy servers can work alongside the Four-way handshake to enhance security. They can encrypt data transmission, provide anonymity and privacy by hiding the client's IP address, and filter malicious traffic, adding an extra layer of protection.<\/p>"},{"question":"What are some potential issues related to Four-way handshake and their solutions?","answer":"<p>Common issues include dictionary attacks on weak passwords and vulnerabilities in WPA2. To address these, users should choose strong passwords, and regular firmware updates should be performed on access points and client devices.<\/p>"},{"question":"Where can I find more information about Four-way handshake and network security?","answer":"<p>For more in-depth details on the Four-way handshake and network security, you can refer to the IEEE 802.11 Standard, Wi-Fi Alliance's website, and explore their WPA2 security overview. OneProxy's comprehensive article is also a valuable resource on this topic.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/477294","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/477294\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/477295"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=477294"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}