{"id":11925,"date":"2025-08-06T15:13:15","date_gmt":"2025-08-06T13:13:15","guid":{"rendered":"https:\/\/webhosting.de\/verschluesselungstechniken-ssl-tls-datenschutz-internet-sicher-schluessel\/"},"modified":"2025-08-06T15:13:15","modified_gmt":"2025-08-06T13:13:15","slug":"%e6%9a%97%e5%8f%b7%e5%8c%96%e6%8a%80%e8%a1%93-ssl-tls-%e3%83%87%e3%83%bc%e3%82%bf%e4%bf%9d%e8%ad%b7-%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%bc%e3%83%8d%e3%83%83%e3%83%88-%e3%82%bb%e3%82%ad%e3%83%a5%e3%82%a2","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/verschluesselungstechniken-ssl-tls-datenschutz-internet-sicher-schluessel\/","title":{"rendered":"SSL\/TLS\u6697\u53f7\u5316\uff1a\u6280\u8853\u3001\u30d7\u30ed\u30bb\u30b9\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u6982\u8981"},"content":{"rendered":"<p>SSL\u6697\u53f7\u5316\u306b\u3088\u308a\u3001\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u304b\u3089\u6a5f\u5bc6\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u3092\u4fdd\u8b77\u3057\u307e\u3059\u3002\u6700\u65b0\u306eTLS\u6a19\u6e96\u306f\u3001RSA\u3001AES\u3001ECDHE\u306a\u3069\u306e\u975e\u5bfe\u79f0\u304a\u3088\u3073\u5bfe\u79f0\u6697\u53f7\u65b9\u5f0f\u3092\u7d44\u307f\u5408\u308f\u305b\u3001\u901a\u4fe1\u3092\u78ba\u5b9f\u306b\u4fdd\u8b77\u3057\u307e\u3059\u3002<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n<ul>\n  <li><strong>SSL\/TLS<\/strong> \u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u306b\u3088\u3063\u3066\u63a5\u7d9a\u3092\u4fdd\u8b77\u3059\u308b\u3002<\/li>\n  <li>\u4edd <strong>SSL\/TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af<\/strong> \u306f\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/li>\n  <li>\u305d\u308c\u306f <strong>\u5bfe\u79f0\u7684<\/strong> \u305d\u3057\u3066 <strong>\u975e\u5bfe\u79f0<\/strong> \u6697\u53f7\u5316\u65b9\u5f0f\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u3002<\/li>\n  <li>\u306a\u3069\u306e\u73fe\u884c\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3002 <strong>TLS 1.3<\/strong> \u5b89\u5168\u6027\u304c\u5927\u5e45\u306b\u5411\u4e0a\u3059\u308b\u3002<\/li>\n  <li><strong>\u8a2d\u5b9a\u30df\u30b9<\/strong> \u306f\u3001\u7df4\u7fd2\u306b\u304a\u3051\u308b\u6700\u5927\u306e\u5f31\u70b9\u306e\u3072\u3068\u3064\u3067\u3042\u308b\u3002<\/li>\n<\/ul>\n\n<p>\u7279\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fc\u306b\u95a2\u3057\u3066\u306f\u3001\u591a\u304f\u306e\u8981\u7d20\u304c\u7d61\u3093\u3067\u304f\u308b\u3002\u6697\u53f7\u5316\u3055\u308c\u305f\u63a5\u7d9a\u306f\u3001\u5b89\u5168\u306a\u4f1d\u9001\u3092\u4fdd\u8a3c\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30ea\u30e2\u30fc\u30c8\u30fb\u30b9\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u5b9f\u969b\u306b\u305d\u3046\u4e3b\u5f35\u3059\u308b\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u3082\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306a\u30a6\u30a7\u30d6\u30fb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\u306b\u4e0d\u5099\u304c\u3042\u308b\u3068\u3001\u8a3c\u660e\u66f8\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u9699\u9593\u304c\u3067\u304d\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u898b\u843d\u3068\u3055\u308c\u304c\u3061\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001TLS 1.0\u306e\u3088\u3046\u306a\u53e4\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3084\u3001\u5b89\u5168\u3067\u306a\u3044\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u304c\u307e\u3060\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u63a5\u7d9a\u5168\u4f53\u3092\u5371\u967a\u306b\u3055\u3089\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u65b0\u3057\u3044\u653b\u6483\u30b7\u30ca\u30ea\u30aa\u304c\u751f\u307e\u308c\u3001\u30d6\u30e9\u30a6\u30b6\u3084\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u8981\u4ef6\u304c\u5e38\u306b\u9032\u5316\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u81ea\u793e\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b3\u30f3\u30bb\u30d7\u30c8\u3092\u5b9a\u671f\u7684\u306b\u898b\u76f4\u3059\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>\u30a6\u30a7\u30d6\u30fb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u898f\u6a21\u306b\u304b\u304b\u308f\u3089\u305a\u3001SSL\/TLS\u3092\u6b63\u3057\u304f\u5b9f\u88c5\u3059\u308b\u3053\u3068\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30b3\u30f3\u30bb\u30d7\u30c8\u306e\u4e2d\u5fc3\u7684\u306a\u67f1\u3067\u3059\u3002\u30a8\u30e9\u30fc\u3084\u4e0d\u4f5c\u70ba\u306f\u3001\u30c7\u30fc\u30bf\u4fdd\u8b77\u9055\u53cd\u306a\u3069\u306e\u6cd5\u7684\u7d50\u679c\u3092\u3082\u305f\u3089\u3059\u3060\u3051\u3067\u306a\u304f\u3001\u30e6\u30fc\u30b6\u30fc\u3084\u9867\u5ba2\u306e\u4fe1\u983c\u3092\u6c38\u4e45\u306b\u63fa\u308b\u304c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5b9f\u7e3e\u306e\u3042\u308b\u6a19\u6e96\u3092\u9075\u5b88\u3059\u308b\u3053\u3068\uff08\u4f8b\u3048\u3070\u3001\u53e4\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7121\u52b9\u5316\u3084\u4e00\u8cab\u3057\u305f\u66f4\u65b0\u306a\u3069\uff09\u306f\u3001\u591a\u304f\u306e\u696d\u754c\u56e3\u4f53\u306b\u3088\u3063\u3066\u5f37\u304f\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<h2>SSL\u3068TLS\uff1a\u5b89\u5168\u306a\u30c7\u30fc\u30bf\u4f1d\u9001\u306e\u57fa\u672c<\/h2>\n<p>SSL\uff08Secure Sockets Layer\uff09\u3068TLS\uff08Transport Layer Security\uff09\u3068\u3044\u3046\u7528\u8a9e\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4ecb\u3057\u305f\u901a\u4fe1\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u6307\u3059\u3002\u6b74\u53f2\u7684\u306b\u306fSSL\u304c\u6700\u521d\u306b\u4f7f\u308f\u308c\u307e\u3057\u305f\u304c\u3001\u73fe\u5728\u3067\u306fTLS\u304c\u6a19\u6e96\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002 <strong>TLS 1.3<\/strong>.\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3001API\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u30fb\u30b5\u30fc\u30d0\u30fc\u3001\u305d\u3057\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u30f3\u30b0\u30fb\u30b5\u30fc\u30d3\u30b9\u3067\u3055\u3048\u3082\u3001\u30c7\u30fc\u30bf\u30fb\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u6697\u53f7\u5316\u3057\u30bb\u30ad\u30e5\u30a2\u306b\u3059\u308b\u305f\u3081\u306b\u3053\u306e\u6280\u8853\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002\u57fa\u672c\u7684\u306a\u76ee\u7684\u306f <strong>\u5b88\u79d8\u7fa9\u52d9<\/strong>, <strong>\u30aa\u30fc\u30bb\u30f3\u30c6\u30a3\u30b7\u30c6\u30a3<\/strong> \u305d\u3057\u3066 <strong>\u8aa0\u5b9f\u3055<\/strong>.<\/p>\n<p>SSL\u8a3c\u660e\u66f8\u300d\u3068\u4eca\u3067\u3082\u3088\u304f\u8a00\u308f\u308c\u308b\u304c\u3001TLS\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u3046\u3088\u3046\u306b\u306a\u3063\u3066\u4e45\u3057\u3044\u3002\u521d\u5fc3\u8005\u5411\u3051\u306b\u306f\u3001\u4f8b\u3048\u3070\u6b21\u306e\u3088\u3046\u306a\u8aac\u660e\u304c\u3042\u308a\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/ssl%e8%a8%bc%e6%98%8e%e6%9b%b8-%e6%a0%bc%e5%ae%89%e3%82%bb%e3%82%ad%e3%83%a5%e3%82%a2%e6%8e%a5%e7%b6%9a%e3%82%bb%e3%83%83%e3%83%88%e3%82%a2%e3%83%83%e3%83%97%e3%82%ac%e3%82%a4%e3%83%89-%e6%9a%97\/\">\u6709\u5229\u306a\u4fa1\u683c\u3067SSL\u8a3c\u660e\u66f8\u3092\u8a2d\u5b9a\u3059\u308b<\/a>\u6700\u521d\u306e\u6982\u8981\u3092\u77e5\u308b\u305f\u3081\u306b\u3002<\/p>\n<p>\u5b9f\u969b\u306b\u306f\u3001\u9069\u5207\u306aTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3002\u30d6\u30e9\u30a6\u30b6\u3001\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30fb\u30b7\u30b9\u30c6\u30e0\u3001\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u5c11\u306a\u304f\u3068\u3082TLS 1.2\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u306e\u304c\u7406\u60f3\u7684\u3067\u3059\u304c\u3001TLS 1.3\u3092\u4f7f\u7528\u3059\u308b\u306e\u304c\u3055\u3089\u306b\u826f\u3044\u3067\u3057\u3087\u3046\u3002 \u7279\u306b\u91cd\u8981\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff08\u4f8b\u3048\u3070\u3001\u6c7a\u6e08\u53d6\u5f15\u3084\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u5065\u5eb7\u30c7\u30fc\u30bf\u306a\u3069\uff09\u306b\u3064\u3044\u3066\u306f\u3001\u3055\u3089\u306b\u53b3\u5bc6\u306b\u8a2d\u5b9a\u3057\u3001\u7d76\u5bfe\u306b\u5b89\u5168\u306a\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u306e\u307f\u3092\u8a31\u53ef\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u3082\u3046\u4e00\u3064\u306e\u5074\u9762\u306f\u3001\u6700\u65b0\u306e\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30fb\u30b7\u30b9\u30c6\u30e0\u3068\u30a6\u30a7\u30d6\u30fb\u30b5\u30fc\u30d0\u30fc\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3042\u308b\u3002<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/ssl-tls-serverraum-1938.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>SSL\/TLS\u306e\u8a73\u3057\u3044\u4ed5\u7d44\u307f<\/h2>\n<p>\u3044\u308f\u3086\u308bSSL\/TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306f\u3001\u5b89\u5168\u306a\u63a5\u7d9a\u306e\u4e2d\u5fc3\u3068\u306a\u308b\u3082\u306e\u3067\u3059\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u305d\u306e\u5f8c\u306e\u6697\u53f7\u5316\u901a\u4fe1\u306e\u305f\u3081\u306e\u6280\u8853\u7684\u306a\u67a0\u7d44\u307f\u6761\u4ef6\u3092\u53d6\u308a\u6c7a\u3081\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3001\u5171\u901a\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3001\u8a3c\u660e\u66f8\u306b\u3088\u308b\u8a8d\u8a3c\u304c\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u7d9a\u3044\u3066\u3001\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u306f\u5bfe\u79f0\u7684\u306a\u624b\u9806\u3067\u4fdd\u8b77\u3055\u308c\u308b\u3002\u5927\u307e\u304b\u306a\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u69cb\u9020\u5316\u3055\u308c\u305f\u65b9\u6cd5\u3067\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\uff1a<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30b9\u30c6\u30c3\u30d7<\/th>\n      <th>\u8aac\u660e<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3053\u3093\u306b\u3061\u306f<\/td>\n      <td>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u3068\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u9001\u4fe1\u3059\u308b\u3002<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30b5\u30fc\u30d0\u30fc\u3053\u3093\u306b\u3061\u306f<\/td>\n      <td>\u30b5\u30fc\u30d0\u30fc\u304c\u9078\u629e\u3068\u8a3c\u660e\u66f8\u3067\u5fdc\u7b54<\/td>\n    <\/tr>\n    <tr>\n      <td>\u691c\u5b9a\u8a66\u9a13<\/td>\n      <td>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u8a3c\u660e\u66f8\u3068\u771f\u6b63\u6027\u3092\u691c\u8a3c<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30ad\u30fc\u4ea4\u63db<\/td>\n      <td>\u5171\u901a\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u30fb\u30ad\u30fc\u304c\u5c0e\u304d\u51fa\u3055\u308c\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30c7\u30fc\u30bf\u4f1d\u9001<\/td>\n      <td>\u3059\u3079\u3066\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u5b89\u5168\u306a\u5bfe\u79f0\u6697\u53f7\u5316<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<p>\u5b9f\u88c5\u306fTLS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3088\u3063\u3066\u304b\u306a\u308a\u7570\u306a\u308b\u3002TLS 1.3\u4ee5\u964d\u3001RC4\u30843DES\u306a\u3069\u3001\u5b89\u5168\u3067\u306a\u3044\u3068\u3055\u308c\u305f\u591a\u304f\u306e\u53e4\u3044\u6697\u53f7\u304c\u30d7\u30ed\u30c8\u30b3\u30eb\u304b\u3089\u524a\u9664\u3055\u308c\u305f\u3002<\/p>\n<p>\u5b9f\u969b\u306e\u63e1\u624b\u306b\u52a0\u3048\u3066\u3001\u3044\u308f\u3086\u308b <strong>TLS\u30ec\u30b3\u30fc\u30c9\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb<\/strong> \u304c\u6c7a\u5b9a\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u3002\u9001\u4fe1\u3059\u308b\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u53ef\u80fd\u306a\u30d6\u30ed\u30c3\u30af\u306b\u5206\u5272\u30fb\u65ad\u7247\u5316\u3057\u3001\u3044\u308f\u3086\u308bTLS\u30ec\u30b3\u30fc\u30c9\u306b\u307e\u3068\u3081\u308b\u3002\u3053\u308c\u3089\u306e\u30ec\u30b3\u30fc\u30c9\u306b\u306f\u3001\u6574\u5408\u6027\u30c1\u30a7\u30c3\u30af\u3001\u6697\u53f7\u5316\u3001\u305d\u308c\u305e\u308c\u306e\u30c7\u30fc\u30bf\u30fb\u30b3\u30f3\u30c6\u30f3\u30c4\u306b\u95a2\u3059\u308b\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u5404\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u4fdd\u8b77\u3055\u308c\u3001\u5b9b\u5148\u306b\u5230\u9054\u3059\u308b\u524d\u306b\u64cd\u4f5c\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u3002<\/p>\n<p>\u3053\u306e\u904e\u7a0b\u3067\u3001\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u6027\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3042\u308b\u3002\u7f72\u540d\u305d\u306e\u3082\u306e\u306b\u52a0\u3048\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u8a3c\u660e\u66f8\u304c\u307e\u3060\u6709\u52b9\u671f\u9593\u5185\u304b\u3069\u3046\u304b\u3001\u8a3c\u660e\u66f8\u5931\u52b9\u30ea\u30b9\u30c8\uff08CRL\uff09\u3084\u30aa\u30f3\u30e9\u30a4\u30f3\u8a3c\u660e\u66f8\u30b9\u30c6\u30fc\u30bf\u30b9\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\uff08OCSP\uff09\u304c\u5931\u52b9\u306e\u30b7\u30b0\u30ca\u30eb\u3092\u51fa\u3057\u3066\u3044\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u3053\u306e\u3088\u3046\u306a\u30c1\u30a7\u30c3\u30af\u30fb\u30b9\u30c6\u30c3\u30d7\u304c\u7121\u8996\u3055\u308c\u308b\u3068\u3001\u3069\u3093\u306a\u306b\u512a\u308c\u305f\u6697\u53f7\u5316\u3067\u3042\u3063\u3066\u3082\u3001\u8a3c\u660e\u66f8\u304c\u64cd\u4f5c\u3055\u308c\u308b\u306a\u3069\u3057\u3066\u653b\u6483\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u975e\u5e38\u306b\u9ad8\u304f\u306a\u308b\u305f\u3081\u3001\u610f\u5473\u304c\u306a\u3044\u3002<\/p>\n\n<h2>\u3069\u306e\u3088\u3046\u306a\u6697\u53f7\u5316\u6280\u8853\u304c\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u304b\uff1f<\/h2>\n<p>SSL\/TLS\u306f\u69d8\u3005\u306a\u6697\u53f7\u5316\u624b\u6cd5\u3092\u8abf\u548c\u3055\u308c\u305f\u624b\u9806\u3067\u7d44\u307f\u5408\u308f\u305b\u3066\u3044\u308b\u3002\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u30b5\u30fc\u30d0\u30fc\u306e\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u3001\u7570\u306a\u308b\u6280\u8853\u3092\u4e26\u884c\u3057\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f4\u3064\u306e\u4e3b\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u7d39\u4ecb\u3057\u307e\u3059\uff1a<\/p>\n\n<ul>\n  <li><strong>\u975e\u5bfe\u79f0\u6697\u53f7\u5316\uff1a<\/strong> \u30bb\u30c3\u30b7\u30e7\u30f3\u30fb\u30ad\u30fc\u306e\u5b89\u5168\u306a\u4ea4\u63db\u3002\u3088\u304f\u4f7f\u308f\u308c\u308b\u306e\u306fRSA\u3068ECDSA\u3002<\/li>\n  <li><strong>\u9375\u4ea4\u63db\u306e\u624b\u9806\uff1a<\/strong> \u4f8b\u3048\u3070\u3001ECDHE\u306f\u300c\u5b8c\u5168\u306a\u524d\u65b9\u79d8\u533f\u300d\u3092\u4fdd\u8a3c\u3059\u308b\u3002<\/li>\n  <li><strong>\u5bfe\u79f0\u6697\u53f7\u5316\uff1a<\/strong> \u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u5f8c\u3001AES\u307e\u305f\u306fChaCha20\u304c\u9032\u884c\u4e2d\u306e\u30c7\u30fc\u30bf\u30fb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u5f15\u304d\u7d99\u3050\u3002<\/li>\n  <li><strong>\u30cf\u30c3\u30b7\u30e5\u3068MAC\uff1a<\/strong> SHA-2\u30d5\u30a1\u30df\u30ea\u30fc\uff08\u7279\u306bSHA-256\uff09\u3068HMAC\u306f\u30c7\u30fc\u30bf\u306e\u5b8c\u5168\u6027\u3092\u78ba\u4fdd\u3059\u308b\u3002<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/ssl_tls_verschluesselung_8274.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<p>\u6955\u5186\u66f2\u7dda\u6697\u53f7\uff08ECC\uff09\u306f\u3001\u7279\u306b\u975e\u5bfe\u79f0\u624b\u7d9a\u304d\u306b\u304a\u3044\u3066\u3001\u307e\u3059\u307e\u3059\u91cd\u8981\u6027\u3092\u5897\u3057\u3066\u3044\u308b\u3002\u53e4\u5178\u7684\u306aRSA\u3068\u6bd4\u8f03\u3057\u3066\u3001\u6955\u5186\u66f2\u7dda\u306f\u3088\u308a\u52b9\u7387\u7684\u3067\u3001\u540c\u7b49\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u305f\u3081\u306b\u3088\u308a\u77ed\u3044\u9375\u3092\u5fc5\u8981\u3068\u3059\u308b\u3068\u8003\u3048\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u3088\u308a\u512a\u308c\u305f\u9045\u5ef6\u6642\u9593\u3092\u9054\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u9ad8\u983b\u5ea6\u306e\u30a6\u30a7\u30d6\u74b0\u5883\u306b\u304a\u3051\u308b\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u3092\u5927\u5e45\u306b\u6539\u5584\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u540c\u6642\u306b\u3001ECDHE\uff08Elliptic Curve Diffie-Hellman Ephemeral\uff09\u306b\u3088\u308b\u9375\u4ea4\u63db\u306f\u3001\u63a5\u7d9a\u304c\u78ba\u7acb\u3055\u308c\u308b\u305f\u3073\u306b\u4e00\u6642\u7684\u306a\u9375\u304c\u4f5c\u6210\u3055\u308c\u3001\u518d\u5229\u7528\u3055\u308c\u306a\u3044\u305f\u3081\u3001\u305d\u306e\u5f8c\u3082\u89e3\u8aad\u304c\u56f0\u96e3\u306a\u307e\u307e\u3067\u3042\u308b\u3053\u3068\u304b\u3089\u3001\u5b8c\u5168\u306a\u524d\u65b9\u79d8\u533f\u306e\u57fa\u790e\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u6697\u53f7\u5316\u306b\u52a0\u3048\u3066\u3001SSL\/TLS\u3082\u5fd8\u308c\u3066\u306f\u306a\u3089\u306a\u3044\u3002 <strong>\u30aa\u30fc\u30bb\u30f3\u30c6\u30a3\u30b7\u30c6\u30a3<\/strong> \u304c\u901a\u4fe1\u306b\u4f7f\u7528\u3055\u308c\u308b\u3002\u30b5\u30fc\u30d0\u30fc\u8a3c\u660e\u66f8\u306b\u30ea\u30f3\u30af\u3055\u308c\u305f\u30ad\u30fc\u30fb\u30da\u30a2\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u30fc\u307e\u305f\u306f\u4ed6\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u3001 \u30b5\u30fc\u30d0\u30fc\u306e\u8eab\u5143\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u7591\u3046\u4f59\u5730\u306a\u304f\u8a8d\u8b58\u3067\u304d\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u3002\u305f\u3060\u3057\u3001\u3053\u306e\u305f\u3081\u306b\u306f\u3001\u8a3c\u660e\u66f8\u304c\u4fe1\u983c\u3067\u304d\u308b\u8a8d\u8a3c\u5c40\uff08CA\uff09\u306b\u3088\u3063\u3066\u767a\u884c\u3055\u308c\u3001\u5171\u901a\u306e\u30c8\u30e9\u30b9\u30c8\u30b9\u30c8\u30a2\u306b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n\n<h2>\u5bfe\u79f0\u578b\u3068\u975e\u5bfe\u79f0\u578b\uff1a\u4e21\u65b9\u304c\u5fc5\u8981\u306a\u7406\u7531<\/h2>\n<p>\u5192\u982d\u3067\u3001\u306a\u305cSSL\/TLS\u306f2\u3064\u306e\u7570\u306a\u308b\u6697\u53f7\u5316\u6280\u8853\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u306e\u304b\u3068\u3088\u304f\u805e\u304b\u308c\u308b\u3002\u305d\u306e\u7b54\u3048\u306f <strong>\u52b9\u7387\u6027<\/strong> \u305d\u3057\u3066 <strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/strong>.\u975e\u5bfe\u79f0\u7684\u306a\u65b9\u6cd5\u306f\u5b89\u5168\u3067\u3059\u304c\u8a08\u7b97\u91cf\u304c\u591a\u304f\u3001\u5bfe\u79f0\u7684\u306a\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u30b9\u30d4\u30fc\u30c9\u3067\u5f97\u70b9\u3092\u7a3c\u304e\u307e\u3059\u3002\u305d\u306e\u305f\u3081SSL\/TLS\u306f\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u9593\u3001\u3064\u307e\u308a\u8a3c\u660e\u66f8\u306e\u4ea4\u63db\u3068\u9375\u306e\u30a2\u30b0\u30ea\u30fc\u30e1\u30f3\u30c8\u306e\u9593\u3060\u3051\u975e\u5bfe\u79f0\u6697\u53f7\u5316\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u30bb\u30c3\u30b7\u30e7\u30f3\u30fb\u30ad\u30fc\u306e\u751f\u6210\u306b\u6210\u529f\u3059\u308b\u3068\u3001\u30e6\u30fc\u30b6\u30fc\u30fb\u30c7\u30fc\u30bf\u306f\u5bfe\u79f0\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u307f\u3067\u4f1d\u9001\u3055\u308c\u308b\u3002128\u30d3\u30c3\u30c8\u307e\u305f\u306f256\u30d3\u30c3\u30c8\u306eAES\u306e\u4e9c\u7a2e\u3068\u3001\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u7684\u306b\u7121\u99c4\u306e\u306a\u3044ChaCha20\u304c\u7279\u306b\u4e00\u822c\u7684\u3067\u3001\u8a08\u7b97\u80fd\u529b\u306b\u5236\u9650\u306e\u3042\u308b\u30e2\u30d0\u30a4\u30eb\u30fb\u30c7\u30d0\u30a4\u30b9\u306b\u597d\u307e\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/p>\n<p>\u3053\u306e\u4e8c\u5206\u6cd5\u306e\u3082\u3046\u4e00\u3064\u306e\u5229\u70b9\u306f\u67d4\u8edf\u6027\u3067\u3042\u308b\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u7a76\u8005\u3084\u958b\u767a\u8005\u306f\u3001\u3088\u308a\u52b9\u7387\u7684\u306a\u65b0\u3057\u3044\u5bfe\u79f0\u30fb\u975e\u5bfe\u79f0\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u3001\u4e92\u3044\u306b\u72ec\u7acb\u3057\u3066\u30c6\u30b9\u30c8\u3057\u305f\u308a\u5b9f\u88c5\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3064\u307e\u308a\u3001\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u5168\u4f53\u3092\u5371\u967a\u306b\u3055\u3089\u3059\u3053\u3068\u306a\u304f\u3001\u5c06\u6765\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u30e2\u30b8\u30e5\u30fc\u30eb\u65b9\u5f0f\u3067\u9069\u5fdc\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4f8b\u3048\u3070\u3001\u6697\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4e00\u90e8\u304c\u65b0\u305f\u306a\u8106\u5f31\u6027\u306e\u767a\u898b\u306b\u3088\u3063\u3066\u653b\u6483\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u3001\u305d\u306e\u90e8\u5206\u306f\u30b3\u30f3\u30bb\u30d7\u30c8\u5168\u4f53\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u306a\u304f\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u306e\u3053\u3068\u306f\u3001SSL\/TLS\u304c\u65b0\u3057\u3044\u8105\u5a01\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306b\u3001\u30aa\u30fc\u30d7\u30f3\u30b9\u30bf\u30f3\u30c0\u30fc\u30c9\u304c\u3044\u304b\u306b\u91cd\u8981\u3067\u3042\u308b\u304b\u3092\u793a\u3057\u3066\u3044\u308b\u3002<\/p>\n\n<h2>\u958b\u767a\uff1aSSL\u304b\u3089TLS 1.3\u3078<\/h2>\n<p>SSL 2.0\u3084SSL 3.0\u3068\u3044\u3063\u305f\u4ee5\u524d\u306eSSL\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u8106\u5f31\u6027\u304c\u77e5\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u5f8c\u3001\u3088\u308a\u5b89\u5168\u306a\u4ee3\u66ff\u624b\u6bb5\u3068\u3057\u3066TLS\u304c\u78ba\u7acb\u3055\u308c\u305f\u3002TLS 1.3\u306f\u73fe\u4ee3\u306eIT\u74b0\u5883\u306b\u304a\u3051\u308b\u6a19\u6e96\u3067\u3042\u308b\u3002\u6c7a\u5b9a\u7684\u306a\u6539\u5584\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/ssl-tls-verschluesselung-techniken-2941.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<ul>\n  <li>\u7c21\u7d20\u5316\u3055\u308c\u305f\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306b\u3088\u308b\u63a5\u7d9a\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u6642\u9593\u306e\u77ed\u7e2e<\/li>\n  <li>SHA-1\u3084RC4\u306e\u3088\u3046\u306a\u5b89\u5168\u3067\u306a\u3044\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4f7f\u7528\u7981\u6b62<\/li>\n  <li>\u5b8c\u5168\u306a\u524d\u65b9\u79d8\u533f\u306e\u4f7f\u7528\u7fa9\u52d9<\/li>\n<\/ul>\n\n<p>\u3053\u308c\u3089\u306e\u9032\u6b69\u306f\u3001\u4fdd\u5b58\u3055\u308c\u305f\u901a\u4fe1\u304c\u9061\u53ca\u7684\u306b\u89e3\u8aad\u3055\u308c\u308b\u3053\u3068\u3092\u9632\u3050\u3002<\/p>\n<p>TLS 1.3\u306b\u306f\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306e\u6539\u5584\u70b9\u3082\u3042\u308b\u3002\u4f8b\u3048\u3070\u3001\u3044\u308f\u3086\u308bSNI\uff08Server Name Indication\uff09\u306f\u3001\u8ffd\u52a0\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u63a5\u7d9a\u3067\u306f\u5fc5\u305a\u3057\u3082\u5e73\u6587\u3067\u9001\u4fe1\u3055\u308c\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u653b\u6483\u8005\u3084\u76e3\u8996\u6a5f\u95a2\u304c\u63a5\u7d9a\u306e\u78ba\u7acb\u306b\u4f7f\u7528\u3055\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u8aad\u307f\u53d6\u308b\u3053\u3068\u304c\u3088\u308a\u56f0\u96e3\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30da\u30fc\u30b8\u30d3\u30e5\u30fc\u304c\u5168\u4f53\u7684\u306b\u901f\u304f\u306a\u308b\u305f\u3081\u3001\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306e\u524a\u6e1b\u306f\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u904b\u55b6\u8005\u306b\u3082\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u3002<\/p>\n<p>\u3082\u30461\u3064\u306e\u6539\u826f\u70b9\u306f\u3001\u30bc\u30edRTT\u518d\u958b\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3042\u308b\u3002\u3053\u306e\u30aa\u30d7 \u30b7\u30e7\u30f3\u306f\u3001\u30bc\u30ed\u304b\u3089\u30d7\u30ed\u30bb\u30b9\u5168\u4f53\u3092\u518d\u69cb\u7bc9\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u4ee5\u524d\u306b\u5b9a\u7fa9\u3055\u308c\u305f\u30bb\u30c3 \u30b7\u30e7\u30f3\u30ad\u30fc\u3092\u5f8c\u7d9a\u306e\u63a5\u7d9a\u306b\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u3092\u53ef\u80fd\u306b\u3059\u308b\u3002\u306a\u305c\u306a\u3089\u3001\u518d\u69cb\u7bc9\u304c\u9069\u5207\u306b\u5b9f\u88c5\u307e\u305f\u306f\u691c\u8a3c\u3055\u308c\u306a\u3044\u5834\u5408\u3001\u7406\u8ad6\u7684\u306b\u306f\u30ea\u30d7\u30ec\u30a4\u653b\u6483\u304c\u69cb\u7bc9\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3089\u3067\u3042\u308b\u3002\u3068\u306f\u3044\u3048\u3001\u7279\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u30fb\u30c7\u30ea\u30d0\u30ea\u30fc\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3084\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u3088\u3046\u306a\u9ad8\u8ca0\u8377\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u3001\u6b63\u5f53\u306a\u63a5\u7d9a\u306b\u3068\u3063\u3066\u306e\u30e1\u30ea\u30c3\u30c8\u306f\u30ea\u30b9\u30af\u3092\u4e0a\u56de\u308a\u307e\u3059\u3002<\/p>\n\n<h2>\u30a8\u30e9\u30fc\u3068\u30df\u30b9\u306e\u539f\u56e0<\/h2>\n<p>\u3088\u304f\u3042\u308b\u8aa4\u89e3\uff1aSSL\/TLS\u306f\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3060\u3051\u306b\u95a2\u4fc2\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002IMAP\u3001SMTP\u3001FTP\u306a\u3069\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3082TLS\u6697\u53f7\u5316\u306b\u3088\u3063\u3066\u4fdd\u8b77\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001API\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3084\u5185\u90e8\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4fdd\u8b77\u306b\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002A <a href=\"https:\/\/webhosting.de\/ja\/https%e8%bb%a2%e9%80%81%e3%81%ae%e8%a8%ad%e5%ae%9a-%e3%82%bb%e3%82%ad%e3%83%a5%e3%82%a2%e3%81%aa%e6%8e%a5%e7%b6%9a%e3%81%ae%e3%83%92%e3%83%b3%e3%83%88-ssl%e3%83%95%e3%82%a9%e3%83%bc%e3%82%ab%e3%82%b9\/\">HTTPS\u8ee2\u9001<\/a> \u306f\u5e38\u306b\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u308b\u3079\u304d\u3067\u3042\u308b\u3002<\/p>\n<p>\u5b9f\u52d9\u306b\u304a\u3051\u308b\u5178\u578b\u7684\u306a\u843d\u3068\u3057\u7a74\uff1a<\/p>\n<ul>\n  <li>\u671f\u9650\u5207\u308c\u8a3c\u660e\u66f8<\/li>\n  <li>\u30b5\u30fc\u30d0\u30fc\u69cb\u6210\u306e\u53e4\u3044\u6697\u53f7\u30b9\u30a4\u30fc\u30c8<\/li>\n  <li>\u30d6\u30e9\u30a6\u30b6\u304c\u4fe1\u983c\u3057\u306a\u3044\u81ea\u5df1\u7f72\u540d\u8a3c\u660e\u66f8<\/li>\n  <li>HTTPS\u3078\u306e\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u306e\u6b20\u843d<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/ssl_tls_verschluesselung_1234.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<p>\u3082\u3046\u4e00\u3064\u306e\u5927\u304d\u306a\u554f\u984c\u306f\u3001\u4e2d\u9593\u8a3c\u660e\u66f8\u306e\u6b63\u3057\u3044\u7d71\u5408\u3067\u3042\u308b\u3002\u4e2d\u9593\u8a3c\u660e\u66f8\u304c\u8a3c\u660e\u66f8\u30c1\u30a7\u30fc\u30f3\u306b\u9069\u5207\u306b\u7d71\u5408\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u5b89\u5168\u3067\u306a\u3044\u63a5\u7d9a\u3084\u7121\u52b9\u306a\u63a5\u7d9a\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u30d6\u30e9\u30a6\u30b6\u306f\u3053\u308c\u3092\u30ea\u30b9\u30af\u3068\u3057\u3066\u5206\u985e\u3059\u308b\u3002\u958b\u767a\u74b0\u5883\u3084\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u74b0\u5883\u3067\u306e\u5b9f\u88c5\u3082\u3001\u4e0d\u7528\u610f\u306b\u5b89\u5168\u3067\u306a\u3044\u8a2d\u5b9a\u304c\u63a1\u7528\u3055\u308c\u308b\u306e\u3092\u9632\u3050\u305f\u3081\u306b\u3001\u672c\u756a\u30b7\u30b9\u30c6\u30e0\u3068\u540c\u69d8\u306b\u6700\u521d\u304b\u3089\u5b89\u5168\u3067\u3042\u308b\u3079\u304d\u3060\u3002<\/p>\n<p>\u7279\u306b\u3001\u30b3\u30f3\u30c6\u30ca\u6280\u8853\u3001\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3001\u30b5\u30fc\u30d0\u30fc\u30ec\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c\u4f7f\u7528\u3055\u308c\u308b\u975e\u5e38\u306b\u52d5\u7684\u306a\u74b0\u5883\u3067\u306f\u3001\u5c0f\u3055\u306a\u8a2d\u5b9a\u30df\u30b9\u3067\u3082\u6df1\u523b\u306a\u7d50\u679c\u3092\u62db\u304f\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u8907\u6570\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u4e92\u3044\u306b\u901a\u4fe1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u5404\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u6709\u52b9\u306a\u8a3c\u660e\u66f8\u3068\u4fe1\u983c\u3067\u304d\u308b\u30eb\u30fc\u30c8\u8a3c\u660e\u66f8\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u8a3c\u660e\u66f8\u7ba1\u7406\u3078\u306e\u6a19\u6e96\u5316\u3055\u308c\u81ea\u52d5\u5316\u3055\u308c\u305f\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u3053\u3053\u3067\u6c7a\u5b9a\u7684\u306a\u5229\u70b9\u3068\u306a\u308b\u3002<\/p>\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306e\u8981\u4ef6<\/h2>\n<p>\u4fe1\u983c\u3067\u304d\u308b\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u81ea\u52d5\u7684\u306b\u6700\u65b0\u306e\u6697\u53f7\u5316\u6a19\u6e96\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\u8a3c\u660e\u66f8\u306e\u7ba1\u7406\u3001\u81ea\u52d5\u66f4\u65b0\u3001TLS 1.3\u306e\u6a19\u6e96\u5b9f\u88c5\u306f\u3001\u4eca\u3084\u6a19\u6e96\u6a5f\u80fd\u3067\u3059\u3002\u30b7\u30f3\u30d7\u30eb\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3078\u306e\u5177\u4f53\u7684\u306a\u4e00\u6b69\u306f <a href=\"https:\/\/webhosting.de\/ja\/plesk-letsencrypt-%e8%a8%bc%e6%98%8e%e6%9b%b8%e3%81%ae%e4%bd%9c%e6%88%90\/\">Let's Encrypt\u8a3c\u660e\u66f8\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7<\/a> - \u308f\u305a\u304b\u6570\u5206\u3067\u53ef\u80fd\u3060\u3002<\/p>\n<p>HTTPS\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u306e\u30b5\u30dd\u30fc\u30c8\u3068\u3001\u72ec\u81ea\u306e\u8a3c\u660e\u66f8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u307e\u305f\u306f\u7d71\u5408\u3059\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u3082\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3055\u308c\u305f\u8981\u4ef6\u3092\u5b9f\u88c5\u3059\u308b\u305f\u3081\u306e\u552f\u4e00\u306e\u65b9\u6cd5\u3067\u3042\u308a\u3001\u7279\u306b\u30b7\u30e7\u30c3\u30d7\u3084\u9867\u5ba2\u30ed\u30b0\u30a4\u30f3\u30b7\u30b9\u30c6\u30e0\u306e\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002 <\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/ssl_tls_2023.webp\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<p>\u8fd1\u5e74\u3001\u591a\u304f\u306e\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30b5\u30fc\u30d3\u30b9\u30fb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u81ea\u52d5\u5316\u3055\u308c\u305f\u8a3c\u660e\u66f8\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306e\u63d0\u4f9b\u306b\u529b\u3092\u5165\u308c\u3066\u304a\u308a\u3001\u6280\u8853\u306b\u7cbe\u901a\u3057\u3066\u3044\u306a\u3044\u4e2d\u5c0f\u4f01\u696d\u3067\u3082\u30bb\u30ad\u30e5\u30a2\u306a\u74b0\u5883\u3092\u69cb\u7bc9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3002\u8a3c\u660e\u66f8\u306e\u66f4\u65b0\u304c\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u5b8c\u5168\u306b\u81ea\u52d5\u5b9f\u884c\u3055\u308c\u3001\u30aa\u30da\u30ec\u30fc\u30bf\u304c\u6709\u52b9\u671f\u9650\u3092\u6c17\u306b\u3059\u308b\u5fc5\u8981\u304c\u306a\u304f\u306a\u308c\u3070\u3001\u5229\u4fbf\u6027\u306f\u5411\u4e0a\u3059\u308b\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u500b\u3005\u306e\u8a2d\u5b9a\u3092\u7dad\u6301\u3059\u308b\u8cac\u4efb\u306f\u9867\u5ba2\u306b\u3042\u308a\u307e\u3059\u3002\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304cTLS 1.3\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b\u304b\u3089\u3068\u3044\u3063\u3066\u3001\u9867\u5ba2\u304c\u5b9f\u969b\u306b\u305d\u308c\u3092\u8a2d\u5b9a\u3057\u305f\u308a\u3001\u3053\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u304c\u3059\u3079\u3066\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3067\u6709\u52b9\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u3055\u3089\u306b\u3001HTTP\/2\u3084HTTP\/3\uff08QUIC\uff09\u306e\u3088\u3046\u306a\u62e1\u5f35\u6a5f\u80fd\u306f\u3001\u901f\u5ea6\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u9762\u3067\u3042\u3089\u3086\u308b\u5229\u70b9\u3092\u6d3b\u7528\u3059\u308b\u305f\u3081\u306b\u3001\u5b9a\u671f\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u512a\u308c\u305f\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306f\u3001\u8a3c\u660e\u66f8\u3084\u63a5\u7d9a\u306b\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306b\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u76e3\u8996\u3057\u3001\u30a2\u30e9\u30fc\u30c8\u3092\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u8fc5\u901f\u306b\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u4eca\u65e5\u3068\u660e\u65e5\uff1aTLS 1.3\u306e\u6b21\u306b\u6765\u308b\u3082\u306e\u306f\uff1f<\/h2>\n<p>TLS 1.3\u306f\u73fe\u5728\u3001\u975e\u5e38\u306b\u5b89\u5168\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3068\u307f\u306a\u3055\u308c\u3066\u3044\u308b\u3002\u3068\u306f\u3044\u3048\u3001\u3053\u306e\u6280\u8853\u3067\u3055\u3048\u653b\u6483\u3092\u5b8c\u5168\u306b\u9632\u3044\u3067\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002\u4eca\u5f8c\u306e\u958b\u767a\u3067\u306f\u3001\u30dd\u30b9\u30c8\u91cf\u5b50\u8010\u6027\u6697\u53f7\u306e\u3088\u3046\u306a\u4ee3\u66ff\u624b\u6cd5\u306b\u7126\u70b9\u304c\u5f53\u3066\u3089\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002TLS 1.4\u306e\u521d\u671f\u30c9\u30e9\u30d5\u30c8\u306f\u3001\u4e92\u63db\u6027\u306e\u5411\u4e0a\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u77ed\u7e2e\u3001\u5f85\u3061\u6642\u9593\u306e\u77ed\u7e2e\u3092\u76ee\u6307\u3057\u3066\u3044\u308b\u3002SHA-3\u306e\u3088\u3046\u306a\u3088\u308a\u5b89\u5168\u306a\u30cf\u30c3\u30b7\u30e5\u3078\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u5909\u66f4\u3082\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u3002<\/p>\n<p>\u30c7\u30b8\u30bf\u30eb\u8a8d\u8a3c\u5c40\u3082\u307e\u305f\u3001TLS\u8a3c\u660e\u66f8\u306e\u900f\u660e\u6027\u3068\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b\u3001\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u6280\u8853\u3092\u8a66\u3057\u3066\u3044\u308b\u3002\u3053\u306e\u30c8\u30ec\u30f3\u30c9\u306f\u3001\u81ea\u52d5\u5316\u3068\u30bc\u30ed\u30fb\u30c8\u30e9\u30b9\u30c8\u30fb\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u30fc\u306e\u65b9\u5411\u3078\u3068\u660e\u3089\u304b\u306b\u9032\u3093\u3067\u3044\u308b\u3002<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/08\/it-arbeitsplatz-1928.webp\" alt=\"\" width=\"1536\" 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