{"id":3950,"date":"2026-11-03T09:30:00","date_gmt":"2026-11-03T09:30:00","guid":{"rendered":"https:\/\/potenting.com\/ja\/blog\/how-ssl-tls-certificates-protect-your-website\/"},"modified":"2026-11-03T11:52:21","modified_gmt":"2026-11-03T11:52:21","slug":"how-ssl-tls-certificates-protect-your-website-ja","status":"publish","type":"post","link":"https:\/\/potenting.com\/ja\/blog\/how-ssl-tls-certificates-protect-your-website\/","title":{"rendered":"SSL\/TLS\u8a3c\u660e\u66f8\u306f\u3069\u306e\u3088\u3046\u306bWeb\u30b5\u30a4\u30c8\u3092\u5b88\u308b\u306e\u304b\uff1f"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3950\" class=\"elementor elementor-3950\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5ae7d9e e-flex e-con-boxed e-con e-parent\" data-id=\"5ae7d9e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element 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data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u4eca\u65e5\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30e6\u30fc\u30b6\u30fc\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u975e\u5e38\u306b\u91cd\u8996\u3057\u3066\u3044\u307e\u3059\u3002Web\u30b5\u30a4\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u81ea\u5206\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u8105\u304b\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u6c17\u3065\u3051\u3070\u3001\u305d\u308c\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306f\u307e\u305a\u306a\u3044\u3067\u3057\u3087\u3046\u3002SSL\u304a\u3088\u3073TLS\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u3066\u30e6\u30fc\u30b6\u30fc\u306e\u60c5\u5831\u3092\u4fdd\u8b77\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3059\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3d33b1a e-flex e-con-boxed e-con e-parent\" data-id=\"3d33b1a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b1afc24 elementor-widget elementor-widget-text-editor\" data-id=\"b1afc24\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>SSL\uff08Secure Sockets Layer\uff09\u3068\u306f\uff1f<\/h2><p>1990\u5e74\u3001\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u3001\u6a29\u9650\u306e\u306a\u3044\u7b2c\u4e09\u8005\u306b\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u30ea\u30b9\u30af\u3092\u6e1b\u3089\u3059\u3053\u3068\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u304c\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002SSL\u304c\u767b\u5834\u3059\u308b\u4ee5\u524d\u3001Web\u30b5\u30fc\u30d0\u30fc\u3068Web\u30d6\u30e9\u30a6\u30b6\u30fc\u9593\u306e\u901a\u4fe1\u306f\u3055\u307e\u3056\u307e\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u8105\u5a01\u306b\u3055\u3089\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u767b\u5834\u306b\u3088\u308a\u3001\u305d\u306e\u5229\u7528\u306f\u6b21\u7b2c\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u6a19\u6e96\u3068\u306a\u308a\u3001\u591a\u304f\u306e\u4f01\u696d\u304c\u30e6\u30fc\u30b6\u30fc\u306e\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u5b88\u308b\u305f\u3081\u306b\u63a1\u7528\u3057\u307e\u3057\u305f\u3002<\/p><p>\u5f53\u521d\u3001SSL\u306f\u52b9\u679c\u7684\u306a\u89e3\u6c7a\u7b56\u306e\u3088\u3046\u306b\u601d\u308f\u308c\u307e\u3057\u305f\u304c\u3001\u3044\u304f\u3064\u304b\u306e\u6b20\u9665\u3084\u5236\u7d04\u304c\u3042\u308a\u3001\u5b8c\u5168\u306b\u4fe1\u983c\u3067\u304d\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u306f\u8a00\u3048\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p><p>\u305f\u3068\u3048\u30702014\u5e74\u306b\u306f\u3001SSL 3.0\u306b\u91cd\u5927\u306a\u8106\u5f31\u6027\u304c\u767a\u898b\u3055\u308c\u3001\u30cf\u30c3\u30ab\u30fc\u306b\u3088\u308b\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3092\u8a31\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u7d50\u679c\u3001\u958b\u767a\u8005\u305f\u3061\u306f\u3088\u308a\u5b89\u5168\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u4ee3\u66ff\u624b\u6bb5\u3092\u6a21\u7d22\u3057\u59cb\u3081\u307e\u3057\u305f\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-efe6d95 e-flex e-con-boxed e-con e-parent\" data-id=\"efe6d95\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e987aa1 elementor-widget elementor-widget-text-editor\" data-id=\"e987aa1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>TLS\uff08Transport Layer 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class=\"elementor-element elementor-element-815ce49 e-flex e-con-boxed e-con e-parent\" data-id=\"815ce49\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a09bb9a elementor-widget elementor-widget-text-editor\" data-id=\"a09bb9a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>SSL\u3068TLS\u306e\u6bd4\u8f03<\/h2><p>SSL\u3068TLS\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u901a\u4fe1\u3092\u4fdd\u8b77\u3059\u308b\u3068\u3044\u3046\u540c\u3058\u76ee\u7684\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u4ed5\u7d44\u307f\u3084\u63d0\u4f9b\u3059\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u30ec\u30d9\u30eb\u306b\u306f\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p><ul><li><h3>SSL\u3068TLS\u306e\u4e3b\u306a\u9055\u3044<\/h3><ul><li><span style=\"color: #cb5c48;\">\u6697\u53f7\u5316\uff1a<\/span>TLS\u306f\u3001\u3088\u308a\u5f37\u529b\u3067\u9ad8\u5ea6\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u6280\u8853\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306b\u306fAES\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u5b8c\u5168\u6027\u306e\u78ba\u4fdd\u306b\u306fHMAC\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u304a\u308a\u3001\u524d\u8eab\u3067\u3042\u308bSSL\u3088\u308a\u3082\u5b89\u5168\u3067\u3059\u3002<\/li><li><span style=\"color: #cb5c48;\">\u3088\u308a\u5f37\u529b\u306a\u8a8d\u8a3c\uff1a<\/span>TLS\u306f\u3001\u901a\u4fe1\u76f8\u624b\u306e\u8eab\u5143\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3088\u308a\u9ad8\u5ea6\u306a\u624b\u6cd5\u3092\u7528\u3044\u3066\u304a\u308a\u3001\u4e2d\u9593\u8005\u653b\u6483\uff08MITM\uff09\u306e\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3082\u3088\u308a\u5b89\u5168\u306a\u8a8d\u8a3c\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/li><li><span style=\"color: #cb5c48;\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u901f\u5ea6\u306e\u5411\u4e0a\uff1a<\/span>TLS\u306f\u3001\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3092\u6700\u9069\u5316\u3057\u3001\u901a\u4fe1\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u524a\u6e1b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u304c\u9ad8\u901f\u5316\u3055\u308c\u3001\u63a5\u7d9a\u306e\u9045\u5ef6\u304c\u6e1b\u5c11\u3059\u308b\u305f\u3081\u3001TLS\u306f\u6700\u65b0\u306eWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u308a\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li><\/ul><\/li><li><h3>SSL\u3068TLS\u306e\u5171\u901a\u70b9<\/h3><ul><li><span style=\"color: #cb5c48;\">\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\uff1a<\/span>\u3069\u3061\u3089\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3082\u3001\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u3001Web\u30d6\u30e9\u30a6\u30b6\u30fc\u3068Web\u30b5\u30fc\u30d0\u30fc\u9593\u306b\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002TLS\u306f\u3001SSL\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u5f31\u70b9\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u305f\u65b0\u3057\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<\/li><li><span style=\"color: #cb5c48;\">\u7528\u8a9e\uff1a<\/span>SSL\u306f\u3059\u3067\u306b\u975e\u63a8\u5968\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u306e\u7528\u8a9e\u306f\u4eca\u3067\u3082TLS\u63a5\u7d9a\u3084TLS\u8a3c\u660e\u66f8\u3092\u6307\u3059\u8a00\u8449\u3068\u3057\u3066\u4e00\u822c\u7684\u306b\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/li><li><span style=\"color: #cb5c48;\">\u76ee\u7684\uff1a<\/span>\u3069\u3061\u3089\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3082\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u9001\u4fe1\u4e2d\u306e\u30c7\u30fc\u30bf\u3092\u4fdd\u8b77\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u7528\u3044\u3066\u8a8d\u8a3c\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002<\/li><li><span style=\"color: #cb5c48;\">HTTPS\u3067\u306e\u4f7f\u7528\uff1a<\/span>HTTPS\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u30fc\u3068Web\u30b5\u30fc\u30d0\u30fc\u9593\u306e\u901a\u4fe1\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306bTLS\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b `https:\/\/` \u304c\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u306eWeb\u30b5\u30a4\u30c8\u304c\u6697\u53f7\u5316\u3055\u308c\u305f\u63a5\u7d9a\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-05808d6 e-flex e-con-boxed e-con e-parent\" data-id=\"05808d6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cbb72bf elementor-widget elementor-widget-html\" data-id=\"cbb72bf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n<style>\n  .ssl-table-wrapper {\n    width: 100%;\n    overflow-x: auto;\n    margin: 25px 0;\n    border-radius: 10px;\n    border: 1px solid #E8D8D4;\n  }\n\n  .ssl-comparison-table {\n    width: 100%;\n    min-width: 550px;\n    border-collapse: collapse;\n    text-align: left;\n    font-size: 15px;\n    line-height: 1.7;\n    background-color: #FFFFFF;\n  }\n\n  .ssl-comparison-table thead {\n    background-color: #CB5C48;\n    color: #FFFFFF;\n  }\n\n  .ssl-comparison-table th {\n    padding: 15px;\n    font-weight: 600;\n    text-align: left;\n  }\n\n  .ssl-comparison-table td {\n    padding: 13px 15px;\n    border-bottom: 1px solid #F0E4E1;\n    color: #444444;\n  }\n\n  .ssl-comparison-table tbody tr:nth-child(even) {\n    background-color: #FFF5F2;\n  }\n\n  .ssl-comparison-table tbody tr:hover {\n    background-color: #FBE8E3;\n  }\n\n  .ssl-comparison-table tbody tr:last-child td {\n    border-bottom: none;\n  }\n\n  @media (max-width: 600px) {\n    .ssl-comparison-table {\n      font-size: 14px;\n    }\n\n    .ssl-comparison-table th,\n    .ssl-comparison-table td {\n      padding: 10px;\n    }\n  }\n<\/style>\n\n<div class=\"ssl-table-wrapper\">\n  <table class=\"ssl-comparison-table\">\n    <thead>\n      <tr>\n        <th>Comparison Criteria<\/th>\n        <th>SSL<\/th>\n        <th>TLS<\/th>\n      <\/tr>\n    <\/thead>\n    <tbody>\n      <tr>\n        <td>Security Status<\/td>\n        <td>Deprecated and insecure<\/td>\n        <td>Modern and more secure standard<\/td>\n      <\/tr>\n      <tr>\n        <td>Encryption Algorithms<\/td>\n        <td>Uses outdated and weak algorithms<\/td>\n        <td>Supports modern encryption algorithms<\/td>\n      <\/tr>\n      <tr>\n        <td>Authentication<\/td>\n        <td>Uses older mechanisms<\/td>\n        <td>Uses improved authentication mechanisms<\/td>\n      <\/tr>\n      <tr>\n        <td>Performance and Speed<\/td>\n        <td>Has security and technical limitations<\/td>\n        <td>Optimized for modern communications<\/td>\n      <\/tr>\n      <tr>\n        <td>Handshake Process<\/td>\n        <td>Older process with security weaknesses<\/td>\n        <td>Improved and more efficient process<\/td>\n      <\/tr>\n      <tr>\n        <td>Resistance to Attacks<\/td>\n        <td>Vulnerable to various attacks<\/td>\n        <td>Provides stronger protection against known attacks<\/td>\n      <\/tr>\n      <tr>\n        <td>Use in HTTPS<\/td>\n        <td>Should no longer be used<\/td>\n        <td>Used to secure HTTPS communications<\/td>\n      <\/tr>\n      <tr>\n        <td>Browser Support<\/td>\n        <td>Older SSL versions are no longer supported<\/td>\n        <td>Modern TLS versions are supported<\/td>\n      <\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-996da9b e-flex e-con-boxed e-con e-parent\" data-id=\"996da9b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8765338 elementor-widget elementor-widget-text-editor\" data-id=\"8765338\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>SSL\u304c\u975e\u63a8\u5968\u306b\u306a\u3063\u305f\u7406\u7531\u3068\u306f\uff1f<\/h2><p>SSL\u306e\u975e\u63a8\u5968\u5316\u306f\u3001\u5fc5\u8981\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3067\u3057\u305f\u3002\u8106\u5f31\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4f7f\u7528\u3001\u4e2d\u9593\u8005\u653b\u6483\uff08MITM\uff09\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u3055\u307e\u3056\u307e\u306a\u653b\u6483\u306b\u5bfe\u3059\u308b\u8106\u5f31\u6027\u3001\u305d\u3057\u3066\u73fe\u4ee3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8981\u4ef6\u3092\u6e80\u305f\u305b\u306a\u3044\u3053\u3068\u304b\u3089\u3001\u3053\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u6642\u4ee3\u9045\u308c\u3067\u4fe1\u983c\u6027\u306e\u4f4e\u3044\u3082\u306e\u3068\u306a\u308a\u307e\u3057\u305f\u3002<\/p><p>\u3055\u3089\u306b\u3001\u6700\u65b0\u306eWeb\u30d6\u30e9\u30a6\u30b6\u30fc\u306f\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306eSSL\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u3053\u3046\u3057\u305f\u53e4\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u4f9d\u5b58\u3057\u3066\u3044\u308bWeb\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u969b\u306b\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8b66\u544a\u304c\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p><h3>\u306a\u305c\u4eca\u3067\u3082SSL\u3068\u3044\u3046\u7528\u8a9e\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u304b\uff1f<\/h3><p>SSL\u306f\u975e\u63a8\u5968\u3068\u306a\u3063\u305f\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u6697\u53f7\u5316\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u6307\u3059\u8a00\u8449\u3068\u3057\u3066\u3053\u306e\u7528\u8a9e\u306f\u4eca\u3067\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u30aa\u30f3\u30e9\u30a4\u30f3\u901a\u4fe1\u3092\u4fdd\u8b77\u3059\u308b\u6a19\u6e96\u306fTLS\u306b\u306a\u308a\u307e\u3057\u305f\u304c\u3001\u591a\u304f\u306e\u4eba\u304c\u7fd2\u6163\u7684\u306bSSL\u3068\u547c\u3073\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002<\/p><p>\u3057\u304b\u3057\u3001SSL\u81ea\u4f53\u306f\u3059\u3067\u306b\u5ec3\u6b62\u3055\u308c\u3066\u304a\u308a\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u73fe\u5728\u300cSSL\u8a3c\u660e\u66f8\u300d\u3068\u3044\u3046\u8a00\u8449\u3092\u8033\u306b\u3057\u305f\u5834\u5408\u3001SSL\u3068\u3044\u3046\u540d\u79f0\u304c\u4eca\u3082\u4e00\u822c\u7684\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u3068\u306f\u3044\u3048\u3001\u901a\u5e38\u306fTLS\u3067\u4f7f\u7528\u3055\u308c\u308b\u8a3c\u660e\u66f8\u3092\u6307\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e98ec50 e-flex e-con-boxed e-con e-parent\" data-id=\"e98ec50\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-45df1e5 elementor-widget elementor-widget-text-editor\" data-id=\"45df1e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>TLS\u8a3c\u660e\u66f8\u306e\u4eca\u5f8c\u306f\uff1f<\/h2><p>\u4eca\u5f8c\u3001TLS\u306f\u6697\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u66f4\u65b0\u3084\u8010\u91cf\u5b50\u8a08\u7b97\u6a5f\u6697\u53f7\u306e\u5c0e\u5165\u306b\u3088\u3063\u3066\u3001\u901a\u4fe1\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u3055\u3089\u306b\u5f37\u5316\u3057\u3066\u3044\u304f\u3067\u3057\u3087\u3046\u3002\u4e00\u65b9\u3067\u3001\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9593\u304c47\u65e5\u306b\u77ed\u7e2e\u3055\u308c\u308b\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306f\u5411\u4e0a\u3059\u308b\u3082\u306e\u306e\u3001\u8a3c\u660e\u66f8\u306e\u7ba1\u7406\u3084\u9069\u5207\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306e\u66f4\u65b0\u306f\u3088\u308a\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/p><p>\u305d\u306e\u7d50\u679c\u3001\u8a3c\u660e\u66f8\u3092\u7ba1\u7406\u3057\u3001\u671f\u9650\u5207\u308c\u3092\u9632\u304e\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u4e2d\u65ad\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001ACME\u306e\u3088\u3046\u306a\u81ea\u52d5\u5316\u30c4\u30fc\u30eb\u3084\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u91cd\u8981\u6027\u304c\u307e\u3059\u307e\u3059\u9ad8\u307e\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dfaf07e e-flex e-con-boxed e-con e-parent\" data-id=\"dfaf07e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ec58a72 elementor-widget elementor-widget-text-editor\" data-id=\"ec58a72\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>TLS\u8a3c\u660e\u66f8\u306f\u4f7f\u3046\u3079\u304d\u304b\uff1f<\/h2><p>\u306f\u3044\u3001\u9593\u9055\u3044\u306a\u304f\u4f7f\u3046\u3079\u304d\u3067\u3059\u3002\u30d3\u30b8\u30cd\u30b9\u3092\u6210\u9577\u3055\u305b\u3001\u30e6\u30fc\u30b6\u30fc\u3068\u306e\u4fe1\u983c\u95a2\u4fc2\u3092\u7bc9\u304d\u305f\u3044\u306e\u3067\u3042\u308c\u3070\u3001TLS\u306e\u4f7f\u7528\u306f\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p><p>\u4eca\u3067\u3082\u6697\u53f7\u5316\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u305b\u305a\u306b\u904b\u55b6\u3055\u308c\u3066\u3044\u308bWeb\u30b5\u30a4\u30c8\u306f\u3042\u308a\u307e\u3059\u304c\u3001Google Chrome\u306a\u3069\u306e\u30d6\u30e9\u30a6\u30b6\u30fc\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u305d\u3046\u3057\u305f\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8b66\u544a\u3092\u8868\u793a\u3057\u307e\u3059\u3002\u305d\u306e\u7d50\u679c\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u305d\u306e\u30b5\u30a4\u30c8\u3092\u4fe1\u983c\u3057\u305f\u308a\u5229\u7528\u3057\u7d9a\u3051\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u4f4e\u304f\u306a\u308a\u3001Web\u30b5\u30a4\u30c8\u306e\u8a55\u5224\u3084\u5168\u4f53\u7684\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u60aa\u5f71\u97ff\u3092\u53ca\u307c\u3059\u304a\u305d\u308c\u304c\u3042\u308a\u307e\u3059\u3002<\/p><p>\u30aa\u30f3\u30e9\u30a4\u30f3\u306e\u4e16\u754c\u3067\u7af6\u4e89\u529b\u3092\u4fdd\u3061\u6210\u529f\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u901a\u4fe1\u3092\u4fdd\u8b77\u3057\u3001\u30e6\u30fc\u30b6\u30fc\u3068\u306e\u4fe1\u983c\u3092\u7bc9\u304f\u305f\u3081\u306bTLS\u8a3c\u660e\u66f8\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e22fdb9 e-flex e-con-boxed e-con e-parent\" data-id=\"e22fdb9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f2d6651 elementor-widget elementor-widget-html\" data-id=\"f2d6651\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n<div class=\"potenting-ssl-cta\">\n  <div class=\"potenting-ssl-cta__top\">\n    <span class=\"potenting-ssl-cta__icon\" aria-hidden=\"true\">\n      &#128274;\n    <\/span>\n    <span class=\"potenting-ssl-cta__label\">\n      WEBSITE SECURITY \u00b7 SSL\/TLS\n    <\/span>\n  <\/div>\n\n  <h3>Secure Your Website. Build Trust.<\/h3>\n\n  <p>\n    Protect your website and your visitors with the right\n    SSL certificate. Explore trusted solutions for encrypted\n    connections, stronger security, and greater customer confidence.\n  <\/p>\n\n  <a\n    class=\"potenting-ssl-cta__button\"\n    href=\"\/ja\/webhosting\/ssl\/\"\n    target=\"_blank\"\n    rel=\"noopener noreferrer\"\n  >\n    Explore SSL Certificates\n    \n  <\/a>\n\n  <div class=\"potenting-ssl-cta__accent\"><\/div>\n<\/div>\n\n<style>\n.potenting-ssl-cta {\n  --cta-coral: #CB5C48;\n  --cta-navy: #101D32;\n  --cta-teal: #77D8C7;\n\n  position: relative;\n  overflow: hidden;\n  box-sizing: border-box;\n  margin: 32px 0;\n  padding: 30px;\n  border: 1px solid rgba(203, 92, 72, 0.25);\n  border-radius: 18px;\n  background:\n    radial-gradient(\n      circle at 100% 0%,\n      rgba(119, 216, 199, 0.14),\n      transparent 36%\n    ),\n    linear-gradient(135deg, #101D32 0%, #1C3048 100%);\n  color: #F7FAFC;\n  font-family: inherit;\n  box-shadow: 0 12px 30px rgba(16, 29, 50, 0.12);\n}\n\n.potenting-ssl-cta__top {\n  display: flex;\n  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