{"id":7570,"date":"2023-11-07T10:05:23","date_gmt":"2023-11-07T01:05:23","guid":{"rendered":"https:\/\/www.prime-strategy.co.jp\/column\/?p=7570"},"modified":"2026-02-17T01:45:13","modified_gmt":"2026-02-16T16:45:13","slug":"https%e6%9a%97%e5%8f%b7%e5%8c%96%e9%80%9a%e4%bf%a1%e3%81%ae%e3%83%91%e3%82%ba%e3%83%ab%e3%81%ae%e6%9c%80%e5%be%8c%e3%81%ae%e3%83%94%e3%83%bc%e3%82%b9","status":"publish","type":"post","link":"https:\/\/kusanagi.tokyo\/column\/archives\/column_7570","title":{"rendered":"HTTPS\u6697\u53f7\u5316\u901a\u4fe1\u306e\u30d1\u30ba\u30eb\u306e\u6700\u5f8c\u306e\u30d4\u30fc\u30b9"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u5c0e\u5165<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"HTTPS%E7%B4%B9%E4%BB%8B\"><\/span><strong>HTTPS<\/strong>\u7d39\u4ecb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>HTTPS&nbsp;=&nbsp;HTTP&nbsp;+&nbsp;TLS\u3001HTTP\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002TLS\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002\u3060\u304b\u3089\u7406\u8ad6\u7684\u306b\u306f\u3001HTTP\u3068TLS\u306e\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u305fHTTPS\u306f\u3001\u30c7\u30fc\u30bf\u4f1d\u9001\u4e2d\u304c\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001TLS\u304c\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u306f\u3001<strong>\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"TLS%E3%83%8F%E3%83%B3%E3%83%89%E3%82%B7%E3%82%A7%E3%82%A4%E3%82%AF%E4%BB%95%E7%B5%84%E3%81%BF\"><\/span>TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u4ed5\u7d44\u307f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6697\u53f7\u5316\u3055\u308c\u305fHTTP\u30e1\u30c3\u30bb\u30fc\u30b8\u3092TLS\u3067\u53d7\u3051\u6e21\u3059\u524d\u306b\u3001\u307e\u305aTLS\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>TLS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u624b\u9806\u306f\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/tls-ssl-handshake-1024x683.png\" alt=\"\" class=\"wp-image-7572\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/tls-ssl-handshake-1024x683.png 1024w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/tls-ssl-handshake-300x200.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/tls-ssl-handshake-768x512.png 768w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/tls-ssl-handshake-1536x1024.png 1536w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/tls-ssl-handshake-2048x1366.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">\u51fa\u5178\uff1ahttps:\/\/www.cloudflare.com\/ja-jp\/learning\/ssl\/what-happens-in-a-tls-handshake\/<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"TLS%E3%83%8F%E3%83%B3%E3%83%89%E3%82%B7%E3%82%A7%E3%82%A4%E3%82%AF%E4%BB%95%E7%B5%84%E3%81%BF%E3%81%AE%E6%AC%A0%E7%82%B9\"><\/span>TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u4ed5\u7d44\u307f\u306e\u6b20\u70b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u6700\u521d\u306b\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3001\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30e9\u30f3\u30c0\u30e0\u3001\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u306e\u30ea\u30b9\u30c8\uff0cSNI\u3092\u542b\u3080\u300cClient Hello\u300d\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>SNI\uff08Server Name Indication\uff09\u306b\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3044\u308b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30fb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u3042\u306a\u305f\u304c\u8a2a\u554f\u3059\u308b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3092\u76e3\u8996\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5185\u90e8\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30dd\u30ea\u30b7\u30fc\u306a\u3069\u6a5f\u80fd\u306f\u3001SNI\u60c5\u5831\u3092\u5206\u6790\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"656\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/1-1024x656.png\" alt=\"\" class=\"wp-image-7575\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/1-1024x656.png 1024w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/1-300x192.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/1-768x492.png 768w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/1.png 1522w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">https:\/\/www.prime-strategy.co.jp\/\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u6642\u3001ClientHello\u306e\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u306b\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u3002<\/figcaption><\/figure>\n\n\n\n<p>\u306a\u305c\u30c9\u30e1\u30a4\u30f3\u306f\u6697\u53f7\u5316\u3055\u308c\u306a\u3044\u306e\u3067\u3059\u304b\uff1f<\/p>\n\n\n\n<p>\u4e00\u3064\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u8907\u6570\u306eWeb\u30b5\u30a4\u30c8\u304c\u3042\u308a\u307e\u3059\u3001\u5404Web\u30b5\u30a4\u30c8\u304c\u72ec\u81ea\u306eSSL\u8a3c\u660e\u66f8\u3092\u6301\u3064\u5834\u5408\u3001IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u3069\u306eWeb\u30b5\u30a4\u30c8\u3068TLS\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u305f\u3044\u306e\u304b\u3092\u5224\u65ad\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u305a\u3001\u3053\u306e\u6642\u3001\u30c9\u30e1\u30a4\u30f3\u306e\u5224\u65ad\u3092\u88dc\u52a9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001<strong>\u3069\u306e\u3088\u3046\u306b\u30a2\u30af\u30bb\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u306a\u3069\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u5b88\u308c\u3070\u3088\u3044\u3067\u3059\u304b<\/strong>\uff1f<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u7d39\u4ecb<\/h1>\n\n\n\n<p>Cloudflare\u306fECH(<a href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-tls-esni-08\" target=\"_blank\" rel=\"noreferrer noopener\"><em>Encrypted Client Hello<\/em>&nbsp;<\/a>)\u3068\u547c\u3070\u308c\u308b\u6280\u8853\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/tools.ietf.org\/html\/draft-ietf-tls-esni-08\" target=\"_blank\" rel=\"noreferrer noopener\"><em>Encrypted Client Hello<\/em>&nbsp;(ECH)<\/a> \u30d7\u30ed\u30c8\u30b3\u30eb\u306fTLS 1.3\u306b\u5c0e\u5165\u3055\u308c\u305f\u62e1\u5f35\u3067\u3042\u308b\u3002ECH\u306e\u76ee\u6a19\u306f\u3001TLS 1.3\u3068\u306e\u4e92\u63db\u6027\u3092\u7dad\u6301\u3057\u306a\u304c\u3089\u3001TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30fc\u30af\u30fb\u30d7\u30ed\u30bb\u30b9\u306e\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u3067\u3042\u308b\u3002\u73fe\u5728\u3001Nginx\u3001Apache\u306a\u3069\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u3001Firefox\u3001Chromium&nbsp;\u306a\u3069\u30d6\u30e9\u30a6\u30b6\u30fc\u3001Cloudflare\u306a\u3069\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u3059\u3067\u306bECH\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306f\u3001Tolerant Networks Limited \u304c\u63d0\u4f9b\u3057\u3066\u3044\u308b\u30c9\u30e1\u30a4\u30f3\u4f7f\u7528\u3057\u3066ECH \u304c\u4f7f\u7528\u3055\u308c\u305f\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>https:\/\/defo.ie\/ech-check.php<\/p>\n\n\n\n<p>defo.ie \u3067\u306f\u3001\u6b21\u306e\u3053\u3068\u304c\u3067\u304d\u307e\u3059:\ufeff<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ECH \u306e\u5c0e\u5165\u3068\u5c55\u958b\u306b\u95a2\u3059\u308b\u7d4c\u9a13\u3092\u53c2\u7167\u3059\u308b\u3002<\/li>\n\n\n\n<li>ECH \u304c\u4f7f\u7528\u3055\u308c\u305f\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n\n\n\n<li>TLS Encrypted ClientHello\uff08ECH\uff09\u306e\u76f8\u4e92\u904b\u7528\u6027\u3092\u3055\u307e\u3056\u307e\u306a\u5b9f\u88c5\u9593\u3067\u30c6\u30b9\u30c8\u3059\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ECH%E3%81%8C%E3%82%AA%E3%83%95%E3%81%AE%E5%A0%B4%E5%90%88\"><\/span>ECH\u304c\u30aa\u30d5\u306e\u5834\u5408<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"814\" height=\"507\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/dde96d2596114ee708bd79cc5a9c4de6.png\" alt=\"\" class=\"wp-image-7578\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/dde96d2596114ee708bd79cc5a9c4de6.png 814w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/dde96d2596114ee708bd79cc5a9c4de6-300x187.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/dde96d2596114ee708bd79cc5a9c4de6-768x478.png 768w\" sizes=\"auto, (max-width: 814px) 100vw, 814px\" \/><\/figure>\n\n\n\n<p>client hello\u306e\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u306b\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u8868\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"424\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/22-1024x424.png\" alt=\"\" class=\"wp-image-7580\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/22-1024x424.png 1024w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/22-300x124.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/22-768x318.png 768w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/22.png 1274w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ECH%E3%81%8C%E3%82%AA%E3%83%B3%E3%81%AE%E5%A0%B4%E5%90%88\"><\/span>ECH\u304c\u30aa\u30f3\u306e\u5834\u5408<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"737\" height=\"482\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/22464d7c2ed716c1d7ac1c9f8ed1019a.png\" alt=\"\" class=\"wp-image-7581\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/22464d7c2ed716c1d7ac1c9f8ed1019a.png 737w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/22464d7c2ed716c1d7ac1c9f8ed1019a-300x196.png 300w\" sizes=\"auto, (max-width: 737px) 100vw, 737px\" \/><\/figure>\n\n\n\n<p>\u4e0a\u306e\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3068\u540c\u3058\u3067\u3057\u305f\u3002client hello\u306b\u306fcover.defo.ie\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u304c\u3001\u5b9f\u969b\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u30c9\u30e1\u30a4\u30f3\u540d\u306fdefo.ie\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"502\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/3-1024x502.png\" alt=\"\" class=\"wp-image-7582\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/3-1024x502.png 1024w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/3-300x147.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/3-768x377.png 768w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/3.png 1389w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u5b9f\u969b\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u306f\u3001\u30d1\u30b1\u30c3\u30c8\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u53d6\u5f97\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002cover.defo.ie\u306f\u6700\u7d42\u30a2\u30af\u30bb\u30b9\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u76e3\u8996\u3055\u308c\u305f\u306e\u3082\u5927\u4e08\u592b\u3067\u3059\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u539f\u7406<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%88%A9%E7%94%A8%E6%96%B9%E6%B3%95\"><\/span>\u5229\u7528\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>ECH\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u90e8\u5206\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u4e21\u65b9\u3092\u9069\u5b9c\u8abf\u6574\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\uff11\u3001chrome\u3084Firefox\u306a\u3069\u30d6\u30e9\u30a6\u30b6\u3092\u6700\u65b0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\uff12\u3001DoH\uff08DNS over HTTPS\uff09\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308bDNS\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002cloudflare\u306eDNS 1.1.1.1\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"509\" height=\"754\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/image.png\" alt=\"\" class=\"wp-image-7587\" style=\"aspect-ratio:0.6750663129973474;width:455px;height:auto\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image.png 509w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-203x300.png 203w\" sizes=\"auto, (max-width: 509px) 100vw, 509px\" \/><\/figure>\n\n\n\n<p>3\u3001Cloudflare\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066SSL\u306eECH\u6a5f\u80fd\u304c\u30aa\u30f3\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1005\" height=\"486\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/5.png\" alt=\"\" class=\"wp-image-7589\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/5.png 1005w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/5-300x145.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/5-768x371.png 768w\" sizes=\"auto, (max-width: 1005px) 100vw, 1005px\" \/><\/figure>\n\n\n\n<p>\u4e0a\u8a18\u30b9\u30c6\u30c3\u30d7\u3092\u5b9f\u884c\u3057\u3066\u304b\u3089\u3001\u5b8c\u5168\u306a\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3067\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3092\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A7%A3%E6%9E%90\"><\/span>\u89e3\u6790<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>ECH\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u8aac\u660e\u3057\u307e\u3059\u3002ECH \u3067\u306f\u3001ClientHello \u30e1\u30c3\u30bb\u30fc\u30b8\u90e8\u5206\u3067\u3059\u3002\u5185\u90e8\u90e8\u5206[<strong>ClientHelloInner<\/strong>]\u3068\u5916\u90e8\u90e8\u5206[<strong>ClientHelloOuter<\/strong>]\u306e 2 \u3064\u306e\u500b\u5225\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u5206\u5272\u3055\u308c\u307e\u3059\u3002\u5916\u5074\u306e\u90e8\u5206\u306b\u306f\u3001\u4f7f\u7528\u3059\u308bECH\u306e\u30c9\u30e1\u30a4\u30f3\u3084TLS\u30d0\u30fc\u30b8\u30e7\u30f3\u306a\u3069\u306e\u6a5f\u5bc6\u6027\u306e\u4f4e\u3044\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u5185\u90e8\u90e8\u5206\u306b\u306f\u3001\u5b9f\u969b\u306e\u30a2\u30af\u30bb\u30b9\u30fb\u30c9\u30e1\u30a4\u30f3\u306a\u3069\u306e\u60c5\u5831\u3092\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002ECH\u30b5\u30fc\u30d0\u30fc\u306e\u516c\u958b\u9375\u3092\u4f7f\u3063\u3066\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"935\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/image-2-1024x935.png\" alt=\"\" class=\"wp-image-7594\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-2-1024x935.png 1024w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-2-300x274.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-2-768x701.png 768w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-2-1536x1402.png 1536w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-2.png 1574w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">\u51fa\u5178\uff1ahttps:\/\/blog.cloudflare.com\/announcing-encrypted-client-hello\/<\/figcaption><\/figure>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001https:\/\/prime-strategy.co.jp\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u304d\u306f\u3001<\/p>\n\n\n\n<p>\uff11\u3001\u307e\u305acloudflare\u30fcDNS\u304b\u3089IP\u3001ECH\u30b5\u30fc\u30d0\u30fc\u306e\u516c\u958b\u9375\u3092\u53d6\u5f97\u3057\u3001\u516c\u958b\u9375\u3067prime-strategy.co.jp\u306a\u3069\u60c5\u5831\u3092\u542b\u307e\u308c\u308bClientHelloInner\u3092\u6697\u53f7\u5316\u3057\u307e\u3059\u3002<strong>ClientHelloOuter<\/strong>\u306bcloudflare-ech\u306a\u3069\u60c5\u5831\u3092\u5165\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\uff12\u3001cloudflare-ech\u30b5\u30fc\u30d0\u30fc\u306f\u79d8\u5bc6\u9375\u3067ClientHelloInner\u3092\u5fa9\u53f7\u5316\u3057\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u306b\u5bfe\u5fdc\u3059\u308b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3092\u898b\u3064\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<p>\uff13\u3001\u5f8c\u306f\u901a\u5e38\u306e HTTPS \u3068\u540c\u3058\u3088\u3046\u306b\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"817\" height=\"415\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/image-4.png\" alt=\"\" class=\"wp-image-7596\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-4.png 817w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-4-300x152.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-4-768x390.png 768w\" sizes=\"auto, (max-width: 817px) 100vw, 817px\" \/><\/figure>\n\n\n\n<p>\u5916\u90e8\u304b\u3089\u76e3\u8996\u3067\u304d\u308b\u306e\u306f\u3001\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u306a\u3044ClientHelloOuter\u306e\u60c5\u5831\u3060\u3051\u3067\u3042\u308a\u3001ClientHelloInner\u306e\u60c5\u5831\u306f\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u76e3\u8996\u3067\u304d\u306a\u3044\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u6700\u5f8c<\/h1>\n\n\n\n<p>\uff11\u3001\u8a18\u4e8b\u4f5c\u6210\u6642\u3001ECH\u6a5f\u80fd\u304c\u3042\u308b\u4e8b\u60c5\u306b\u3088\u308a\u4e00\u6642\u7684\u306b\u505c\u6b62\u3057\u3066\u3044\u307e\u3059\u304c\u3001Cloudflare\u306f\u3067\u304d\u308b\u3060\u3051\u65e9\u304f\u554f\u984c\u3092\u89e3\u6c7a\u3057\u3066\u30aa\u30fc\u30d7\u30f3\u3059\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"502\" src=\"https:\/\/www.prime-strategy.co.jp\/column\/wp-content\/uploads\/2023\/10\/image-5-1024x502.png\" alt=\"\" class=\"wp-image-7597\" srcset=\"https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-5-1024x502.png 1024w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-5-300x147.png 300w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-5-768x376.png 768w, https:\/\/kusanagi.tokyo\/column\/wp-content\/uploads\/2023\/10\/image-5.png 1033w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\uff12\u3001\u4e00\u3064\u61f8\u5ff5\u70b9\u3042\u308a\u307e\u3059\u3002cloudflare-ech.com\u304c\u6545\u969c\u306b\u306a\u3063\u305f\u5834\u5408\u3001\u95a2\u9023\u306eECH\u3059\u308b\u3059\u3079\u3066\u306e\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002Cloudflare\u306f\u4e16\u754c\u6700\u5927\u306eCDN\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3067\u3042\u308a\u3001\u554f\u984c\u304c\u8d77\u304d\u308c\u3070\u5927\u304d\u306a\u5f71\u97ff\u304c\u51fa\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u53c2\u8003<\/h4>\n\n\n\n<p><a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/draft-ietf-tls-esni-08\">https:\/\/datatracker.ietf.org\/doc\/html\/draft-ietf-tls-esni-08<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/developers.cloudflare.com\/ssl\/edge-certificates\/ech\/\">https:\/\/developers.cloudflare.com\/ssl\/edge-certificates\/ech\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/blog.cloudflare.com\/announcing-encrypted-client-hello\/\">https:\/\/blog.cloudflare.com\/announcing-encrypted-client-hello\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.cloudflare.com\/ja-jp\/learning\/ssl\/what-happens-in-a-tls-handshake\/\">https:\/\/www.cloudflare.com\/ja-jp\/learning\/ssl\/what-happens-in-a-tls-handshake\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c0e\u5165 HTTPS\u7d39\u4ecb HTTPS&nbsp;=&nbsp;HTTP&nbsp;+&nbsp;TLS\u3001HTTP\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u306e\u30d7\u30ed\u30c8\u30b3\u30eb ... <a title=\"HTTPS\u6697\u53f7\u5316\u901a\u4fe1\u306e\u30d1\u30ba\u30eb\u306e\u6700\u5f8c\u306e\u30d4\u30fc\u30b9\" class=\"read-more\" href=\"https:\/\/kusanagi.tokyo\/column\/archives\/column_7570\" aria-label=\"HTTPS\u6697\u53f7\u5316\u901a\u4fe1\u306e\u30d1\u30ba\u30eb\u306e\u6700\u5f8c\u306e\u30d4\u30fc\u30b9 \u306b\u3064\u3044\u3066\u3055\u3089\u306b\u8aad\u3080\">Read more<\/a><\/p>\n","protected":false},"author":35,"featured_media":7677,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[113],"tags":[110],"series":[67],"journey":[100],"product":[],"class_list":["post-7570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","tag-technical-guides","series-engineer-blog","journey-deep","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HTTPS\u6697\u53f7\u5316\u901a\u4fe1\u306e\u30d1\u30ba\u30eb\u306e\u6700\u5f8c\u306e\u30d4\u30fc\u30b9 - KUSANAGI Tech Column<\/title>\n<meta name=\"description\" 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