{"id":37110,"date":"2022-09-21T16:45:08","date_gmt":"2022-09-21T07:45:08","guid":{"rendered":"https:\/\/kinsta.com\/jp\/?p=37110&#038;post_type=knowledgebase&#038;preview_id=37110"},"modified":"2025-10-02T04:48:53","modified_gmt":"2025-10-01T19:48:53","slug":"err_ssl_client_auth_signature_failed","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/err_ssl_client_auth_signature_failed\/","title":{"rendered":"\u300cERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5"},"content":{"rendered":"<p>SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u3092\u4f7f\u3063\u3066\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3057\u3088\u3046\u3068\u3057\u305f\u3089\u3001\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u304b\uff1f<\/p>\n<p>SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u306f\u3001\u91cd\u8981\u306a\u30c4\u30fc\u30eb\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u63a5\u7d9a\u3059\u308b\u969b\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f37\u5316\u3057\u3066\u304f\u308c\u308b\u3082\u306e\u3002\u3068\u3053\u308d\u304c\u3001\u8a8d\u8a3c\u6642\u306b\u4f55\u3089\u304b\u306e\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u63a5\u7d9a\u3067\u304d\u306a\u304f\u306a\u308a\u5384\u4ecb\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u30a8\u30e9\u30fc\u306b\u3064\u3044\u3066\u6398\u308a\u4e0b\u3052\u3001\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>\u300cERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED\u300d\u30a8\u30e9\u30fc\u306b\u3064\u3044\u3066<a href=\"https:\/\/www.youtube.com\/watch?v=ROu7JPpAH2g\" target=\"_blank\" rel=\"noopener noreferrer\">\u52d5\u753b\u3067\u306e\u89e3\u8aac<\/a>\u3082\u3054\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002<\/h3>\n<p class=\"p1\"><kinsta-video src=\"https:\/\/www.youtube.com\/watch?v=ROu7JPpAH2g\"><\/kinsta-video><\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<h2>\u300cERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED\u300d\u3068\u306f<\/h2>\n<p><a href=\"https:\/\/kinsta.com\/blog\/how-ssl-works\/\">\u30b5\u30fc\u30d0\u30fc\u30ec\u30d9\u30eb\u306eSSL\u8a3c\u660e\u66f8<\/a>\u306b\u3064\u3044\u3066\u306f\u3001\u65e2\u306b\u3054\u5b58\u77e5\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u73fe\u5728\u3001\u307b\u3068\u3093\u3069\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6\u3068\u30b5\u30fc\u30d0\u30fc\u306e\u9593\u306b\u6697\u53f7\u5316\u3055\u308c\u305f\u5b89\u5168\u306a\u63a5\u7d9a\u3092\u78ba\u7acb\u3059\u308b\u305f\u3081\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/types-of-ssl-certificates\/\">SSL\u8a3c\u660e\u66f8<\/a>\u3068HTTPS\u63a5\u7d9a\u304c\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u8ee2\u9001\u4e2d\u306e\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001<a href=\"https:\/\/kinsta.com\/blog\/ssl-check\/\">\u30b5\u30fc\u30d0\u30fc<\/a>\u304c\u30b5\u30a4\u30c8\u904b\u55b6\u8005\u306e\u5b9f\u5728\u6027\u3092\u78ba\u8a8d\u3059\u308b\u76ee\u7684\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u3067\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3001\u3064\u307e\u308a\u30e6\u30fc\u30b6\u30fc\uff08\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3059\u308b\u30d6\u30e9\u30a6\u30b6\uff09\u3082\u72ec\u81ea\u306eSSL\u8a3c\u660e\u66f8\u3067\u8eab\u5143\u3092\u8a3c\u660e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u304c\u5fc5\u8981\u306a\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3059\u308b\u306b\u306f\u3001SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u3092\u63d0\u793a\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3084\u643a\u5e2f\u7528\u30b9\u30de\u30fc\u30c8\u30ab\u30fc\u30c9\u30ea\u30fc\u30c0\u30fc\u306a\u3069\u306b\u4fdd\u7ba1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u5f8c\u8005\u306f\u591a\u304f\u306e\u4f01\u696d\u3067\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u8a8d\u8a3c\u3055\u308c\u305f\u7279\u5b9a\u306e\u30e6\u30fc\u30b6\u30fc\u3060\u3051\u306b\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5c64\u3092\u539a\u304f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u591a\u304f\u306e\u30d3\u30b8\u30cd\u30b9\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u3001\u7279\u5b9a\u306e\u30b5\u30fc\u30d0\u30fc\u306e\u30a2\u30af\u30bb\u30b9\u5236\u9650\u306b\u3001SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306f\u4e0d\u53ef\u6b20\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u306eSSL\u8a3c\u660e\u66f8\u3067\u306f\u306a\u304f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u306eSSL\u8a3c\u660e\u66f8\u306b\u4f55\u3089\u304b\u306e\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n<h2>\u300cERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0<\/h2>\n<p>\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u306f\u6280\u8853\u7684\u306a\u30a8\u30e9\u30fc\u3092\u610f\u5473\u3059\u308b\u305f\u3081\u3001\u539f\u56e0\u3082\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001\u305d\u308c\u306b\u76f4\u7d50\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee3\u8868\u7684\u306a\u539f\u56e0\u306e1\u3064\u304c\u3001\u63a5\u7d9a\u306b\u304a\u3051\u308b\u4f55\u3089\u304b\u306e\u5e72\u6e09\u3002\u5f8c\u307b\u3069\u8a73\u3057\u304f\u89e6\u308c\u3066\u3044\u304d\u307e\u3059\u304c\u3001\u63a5\u7d9a\u306e\u5e72\u6e09\u306b\u3082\u307e\u305f\u591a\u304f\u306e\u539f\u56e0\u304c\u8003\u3048\u3089\u308c\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/types-of-malware\/\">\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8<\/a>\u3001<a href=\"https:\/\/kinsta.com\/blog\/proxy-vs-vpn\/\">VPN<\/a>\u3001macOS\u306e\u30ad\u30fc\u30c1\u30a7\u30fc\u30f3\u30a2\u30af\u30bb\u30b9\u30a2\u30d7\u30ea\u306a\u3069\u304c\u305d\u306e\u4e00\u4f8b\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/tls-vs-ssl\/\">SSL\u8a3c\u660e\u66f8\u306e\u57fa\u76e4\u3068\u306a\u308b\u30d7\u30ed\u30c8\u30b3\u30eb<\/a>\u3067\u3042\u308bTLS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u8d77\u56e0\u3057\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>TLS\u306b\u306f\u30011.0\u30011.1\u30011.2\u30011.3\u306e4\u3064\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u3042\u308a\u307e\u3059\u304c\u3001TLS 1.0\u30681.1\u306f2022\u5e74\u73fe\u5728\u3001\u975e\u63a8\u5968\u3067\u3059\u3002<\/p>\n<p>\u65b0\u3057\u3059\u304e\u308b\u3001\u3082\u3057\u304f\u306f\u53e4\u3059\u304e\u308bTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u30a8\u30e9\u30fc\u304c\u8d77\u3053\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\uff08\u4f7f\u7528\u3057\u3066\u3044\u308b\u30b9\u30de\u30fc\u30c8\u30ab\u30fc\u30c9\u304cTLS 1.2\u306e\u307f\u5bfe\u5fdc\u3067\u3001\u30b5\u30fc\u30d0\u30fc\u306eTLS\u304c1.3\u306e\u5834\u5408\u306a\u3069\uff09\u3002<\/p>\n<h2>\u300cERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n<p>\u3067\u306f\u3001\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5\u3092\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u7c21\u5358\u306a\u65b9\u6cd5\u304b\u3089\u9806\u306b\u3054\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>1. \u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3092\u518d\u8d77\u52d5\u3059\u308b<\/h3>\n<p>\u300c\u518d\u8d77\u52d5\u306f\u3057\u3066\u307f\u307e\u3057\u305f\u304b\uff1f&#8230;\u300d<\/p>\n<p>\u3053\u306e\u30bb\u30ea\u30d5\u306f\u3001\u3082\u306f\u3084\u4e16\u754c\u7684\u306b<a href=\"https:\/\/www.youtube.com\/watch?v=nn2FB1P_Mn8\">\u30df\u30fc\u30e0\uff08\u9762\u767d\u30cd\u30bf\uff09<\/a>\u306b\u306a\u3063\u3066\u3044\u308b\u307b\u3069\u5b9a\u756a\u3067\u3059\u304c\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u57fa\u672c\u3067\u3042\u308a\u3001\u307e\u305a\u306f\u3053\u3053\u304b\u3089\u59cb\u3081\u308b\u306e\u304c\u5f97\u7b56\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3082\u3061\u308d\u3093\u3001\u518d\u8d77\u52d5\u304c\u5168\u3066\u306e\u554f\u984c\u89e3\u6c7a\u306b\u3064\u306a\u304c\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3082\u3057\u3053\u308c\u3067\u89e3\u6c7a\u3067\u304d\u308c\u3070\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u6642\u9593\u3092\u5927\u5e45\u306b\u7bc0\u7d04\u3067\u304d\u308b\u305f\u3081\u3001\u8a66\u3057\u3066\u307f\u308b\u4fa1\u5024\u306f\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>2. Chrome\u3092\u66f4\u65b0\u3059\u308b<\/h3>\n<p>\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306eChrome\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u308c\u304c\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u305d\u3057\u3066\u3001Chrome\u304c\u4f7f\u7528\u3057\u3066\u3044\u308bTLS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u8d77\u56e0\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u9ad8\u3044\u3067\u3059\u3002<\/p>\n<p>Chrome\u3092\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u66f4\u65b0\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>3. Chrome\u3092\u521d\u671f\u5316\u3059\u308b<\/h3>\n<p>Chrome\u306e\u66f4\u65b0\u306b\u52a0\u3048\u3066\u3001Chrome\u306e\u8a2d\u5b9a\u306e\u30ea\u30bb\u30c3\u30c8\u3082\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u57fa\u672c\u7684\u306a\u89e3\u6c7a\u7b56\u3002<\/p>\n<p>Chrome\u306b\u306f\u3053\u306e\u4f5c\u696d\u3092\u884c\u3046\u6a5f\u80fd\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u304a\u308a\u3001\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<ol>\n<li>\u30d6\u30e9\u30a6\u30b6\u306e\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b\u300c<strong>chrome:\/\/settings\/privacy<\/strong>\u300d\u3092\u8cbc\u308a\u4ed8\u3051\u308b<\/li>\n<li>\u8a2d\u5b9a\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u307e\u3067\u4e0b\u306b\u30b9\u30af\u30ed\u30fc\u30eb<\/li>\n<li>\u300c<strong>\u8a73\u7d30\u8a2d\u5b9a<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u8ffd\u52a0\u8a2d\u5b9a\u3092\u958b\u304f<\/li>\n<li>\u300c<strong>\u30ea\u30bb\u30c3\u30c8\u3068\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7<\/strong>\u300d\uff08Windows\uff09\u3082\u3057\u304f\u306f\u300c<strong>\u8a2d\u5b9a\u306e\u30ea\u30bb\u30c3\u30c8<\/strong>\u300d\uff08Mac\u3001Linux\uff09\uff1e\u300c<strong>\u8a2d\u5b9a\u3092\u5143\u306e\u65e2\u5b9a\u5024\u306b\u623b\u3059<\/strong>\u300d\uff1e\u300c<strong>\u8a2d\u5b9a\u306e\u30ea\u30bb\u30c3\u30c8<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af<\/li>\n<\/ol>\n<aside role=\"note\" class=\"wp-block-kinsta-notice is-style-important\">\n            <h3>Important<\/h3>\n        <p>\u3053\u306e\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u74b0\u5883\u8a2d\u5b9a\uff08\u30d6\u30c3\u30af\u30de\u30fc\u30af\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3001\u95b2\u89a7\u5c65\u6b74\u306a\u3069\uff09\u304c\u524a\u9664\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u6b8b\u3057\u3066\u304a\u304d\u305f\u3044\u30c7\u30fc\u30bf\u304c\u3042\u308b\u5834\u5408\u306f\u3001Chrome\u3092\u521d\u671f\u5316\u3059\u308b\u524d\u306b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u53d6\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<a href=\"https:\/\/www.wikihow.com\/Backup-and-Restore-Google-Chrome%27s-Entire-Settings\">\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u4f5c\u6210\u65b9\u6cd5\u306f\u3053\u3061\u3089<\/a><\/p>\n<\/aside>\n\n<figure id=\"attachment_117102\" aria-describedby=\"caption-attachment-117102\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-117102\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2022\/03\/restore-chrome-to-defaults-1024x749.jpg\" alt=\"How to restore Chrome settings to defaults.\" width=\"1024\" height=\"749\"><figcaption id=\"caption-attachment-117102\" class=\"wp-caption-text\">Chrome\u306e\u8a2d\u5b9a\u3092\u30ea\u30bb\u30c3\u30c8\u3059\u308b<\/figcaption><\/figure>\n<h3>4. \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u3092\u7121\u52b9\u5316\u3059\u308b<\/h3>\n<p>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u306e\u4e2d\u306b\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3068\u30b5\u30fc\u30d0\u30fc\u306e\u63a5\u7d9a\u3092\u5e72\u6e09\u3057\u3066\u3001\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3059\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u7d44\u307f\u8fbc\u307e\u308c\u305f\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3084\u3001\u5c02\u7528\u306e\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3082\u4f8b\u5916\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u4e00\u5ea6\u7121\u52b9\u5316\u3057\u3066\u3001\u518d\u5ea6\u63a5\u7d9a\u3092\u884c\u306a\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u3067\u30a8\u30e9\u30fc\u304c\u89e3\u6d88\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u5225\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u30eb\u30fc\u30eb\u3092\u8abf\u6574\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>5. VPN\u3092\u7121\u52b9\u5316\u3059\u308b<\/h3>\n<p><a href=\"https:\/\/kinsta.com\/blog\/how-does-a-vpn-work\/\" target=\"_blank\" rel=\"noopener noreferrer\">VPN\u306e\u4f7f\u7528<\/a>\u3082\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>VPN\u304c\u5fc5\u8981\u306a\u5834\u5408 \uff08\u4f1a\u793e\u3067\u63a8\u5968\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306a\u3069\uff09\u3082VPN\u3092\u4e00\u5ea6\u7121\u52b9\u5316\u3057\u3066\u3001\u518d\u63a5\u7d9a\u3092\u884c\u306a\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>6. \u30ad\u30fc\u30c1\u30a7\u30fc\u30f3\u30a2\u30af\u30bb\u30b9\u30a2\u30d7\u30ea\u306e\u8abf\u6574\uff08macOS\uff09<\/h3>\n<p>macOS\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001<a href=\"https:\/\/support.apple.com\/en-vn\/guide\/keychain-access\/kyca1083\/mac\" target=\"_blank\" rel=\"noopener noreferrer\">\u30ad\u30fc\u30c1\u30a7\u30fc\u30f3\u30a2\u30af\u30bb\u30b9\u30a2\u30d7\u30ea<\/a>\u304c\u539f\u56e0\u3067\u3042\u308b\u3053\u3068\u3082\u4e00\u822c\u7684\u3067\u3059\u3002\u30ad\u30fc\u30c1\u30a7\u30fc\u30f3\u30a2\u30af\u30bb\u30b9\u30a2\u30d7\u30ea\u3068\u306f\u3001SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u3092\u542b\u3080\u30d1\u30b9\u30ef\u30fc\u30c9\u3084\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u60c5\u5831\u3092\u4fdd\u5b58\u3059\u308bApple\u63d0\u4f9b\u306emacOS\u5c02\u7528\u30a2\u30d7\u30ea\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u304c\u539f\u56e0\u306e\u5834\u5408\u3001SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u306fSafari\u3067\u306f\u6210\u529f\u3059\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001Chrome\u3084Firefox\u306a\u3069\u306e<a href=\"https:\/\/kinsta.com\/jp\/browser-market-share\/\">\u4ed6\u306e\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6<\/a>\u3067\u306f\u30a8\u30e9\u30fc\u304c\u8d77\u3053\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u89e3\u6c7a\u7b56\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<ol>\n<li>\u30ad\u30fc\u30c1\u30a7\u30fc\u30f3\u30a2\u30af\u30bb\u30b9\u30a2\u30d7\u30ea\u3092\u958b\u304f<\/li>\n<li>\u300c<strong>\u30ed\u30b0\u30a4\u30f3<\/strong>\u300d\uff1e\u300c<strong>\u81ea\u5206\u306e\u8a3c\u660e\u66f8<\/strong>\u300d\u3067SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u3092\u898b\u3064\u3051\u308b<\/li>\n<li>\u8a72\u5f53\u306eHTTPS\u79d8\u5bc6\u9375\u3092\u53f3\u30af\u30ea\u30c3\u30af<\/li>\n<li>\u300c<strong>\u30a2\u30af\u30bb\u30b9\u5236\u5fa1<\/strong>\u300d\u30bf\u30d6\u3092\u958b\u304f<\/li>\n<li>\u300c<strong>\u3053\u306e\u9805\u76ee\u306e\u4f7f\u7528\u3092\u3059\u3079\u3066\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u8a31\u53ef<\/strong>\u300d\u3092\u9078\u629e\uff08\u3059\u3067\u306b\u9078\u629e\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u3066\u3082\u518d\u5ea6\u30af\u30ea\u30c3\u30af\u3067\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\uff09<\/li>\n<li>\u300c<strong>\u5909\u66f4\u5185\u5bb9\u3092\u4fdd\u5b58<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af<\/li>\n<\/ol>\n<p>\u3059\u308b\u3068\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a8d\u8a3c\u304c\u5fc5\u8981\u306a\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3059\u308b\u969b\u3001\u30ad\u30fc\u30c1\u30a7\u30fc\u30f3\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u5165\u529b\u3092\u6c42\u3081\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u5165\u529b\u5f8c\u3001\u300c<strong>\u5e38\u306b\u8a31\u53ef<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u308c\u3067\u554f\u984c\u304c\u89e3\u6c7a\u3059\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<h3>7. \u30d6\u30e9\u30a6\u30b6\u306eTLS\u8a2d\u5b9a\u3092\u5909\u66f4\u3059\u308b<\/h3>\n<p>TLS\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u8a2d\u5b9a\uff08\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u65b0\u3057\u3059\u304e\u308b\u304b\u53e4\u3059\u304e\u308b\uff09\u304c\u539f\u56e0\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u6700\u3082\u4e00\u822c\u7684\u306a\u306e\u306f\u3001\u4f7f\u7528\u3057\u3066\u3044\u308b\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u307e\u305f\u306f\u30b9\u30de\u30fc\u30c8\u30ab\u30fc\u30c9\u30ea\u30fc\u30c0\u30fc\u304c\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/tls-1-3\/\" target=\"_blank\" rel=\"noopener noreferrer\">TLS 1.2\u307e\u305f\u306f1.3<\/a>\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u30d6\u30e9\u30a6\u30b6\u3067TLS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30921.1\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u4e00\u6642\u7684\u306a\u89e3\u6c7a\u7b56\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>TLS 1.0\u30681.1\u306f\u3059\u3067\u306b\u975e\u63a8\u5968\u306b\u306a\u3063\u3066\u304a\u308a\u3001\u672c\u6765\u306f\u6700\u65b0\u306eTLS\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u3059\u308b\u306e\u304c\u7406\u60f3\u7684\u3067\u3042\u308b\u305f\u3081\u3001\u9577\u671f\u7684\u306a\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u306f<strong>\u304a\u52e7\u3081\u3057\u307e\u305b\u3093<\/strong>\u304c\u3001\u7dca\u6025\u306e\u72b6\u6cc1\u306b\u5bfe\u3059\u308b\u5fdc\u6025\u51e6\u7f6e\u306b\u306f\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>Chrome\u306eTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u30921.1\u306b\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u306f\u3001\u4ee5\u4e0b\u306e\u901a\u308a\uff08Windows\u306e\u5834\u5408\uff09\u3002<\/p>\n<ol>\n<li>\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u4e0a\u306eChrome\u306e\u30a2\u30a4\u30b3\u30f3\u3092\u53f3\u30af\u30ea\u30c3\u30af\u3057\u3066\u300c<strong>\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af<\/li>\n<li>\u300c<strong>\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8<\/strong>\u300d\u30bf\u30d6\u306e\u300c<strong>\u30ea\u30f3\u30af\u5148<\/strong>\u300d\u306e\u8a2d\u5b9a\u3092\u898b\u3064\u3051\u308b\uff08\u6700\u521d\u306b\u8868\u793a\u3055\u308c\u308b\u30bf\u30d6\uff09<\/li>\n<li>\u65e2\u5b58\u306e\u6587\u5b57\u5217\u306e\u5f8c\u308d\u306b\uff08\u534a\u89d2\u30b9\u30da\u30fc\u30b9\u3092\u5165\u308c\u3066\uff09\u300c<strong>ssl-version-max=tls1.1<\/strong>\u300d\u3092\u8cbc\u308a\u4ed8\u3051\u308b<\/li>\n<li>\u300c<strong>OK<\/strong>\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u5909\u66f4\u3092\u4fdd\u5b58<\/li>\n<\/ol>\n<figure id=\"attachment_117103\" aria-describedby=\"caption-attachment-117103\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-117103\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2022\/03\/change-chrome-tls-version-1024x673.png\" alt=\"How to force Chrome to use a different TLS version.\" width=\"1024\" height=\"673\"><figcaption id=\"caption-attachment-117103\" class=\"wp-caption-text\">Chrome\u306eTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5909\u66f4<\/figcaption><\/figure>\n<p>\u3053\u308c\u3067\u3001Chrome\u3067TLS 1.1\u304c\u4f7f\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>Firefox\u306e\u5834\u5408\u306f\u3001Firefox\u306e\u8a2d\u5b9a\u304b\u3089TLS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>Firefox\u3092\u958b\u304f<\/li>\n<li>\u30d6\u30e9\u30a6\u30b6\u306e\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b\u300c<strong>about:config<\/strong>\u300d\u3092\u8cbc\u308a\u4ed8\u3051\u308b<\/li>\n<li>\u691c\u7d22\u30d0\u30fc\u3067TLS\u3092\u691c\u7d22<\/li>\n<li>\u300c<strong>security.tls.version.min<\/strong>\u300d\u3068\u300c<strong>security.tls.version.max<\/strong>\u300d\u3092\u7de8\u96c6\uff08<a href=\"http:\/\/kb.mozillazine.org\/Security.tls.version.*\">\u8a73\u3057\u304f\u306f\u3053\u3061\u3089\u306e\u8a18\u4e8b<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\uff09<\/li>\n<\/ol>\n<figure id=\"attachment_117101\" aria-describedby=\"caption-attachment-117101\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-117101\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2022\/03\/firefox-change-tls-version-1024x674.png\" alt=\"How to change TLS version in Firefox.\" width=\"1024\" height=\"674\"><figcaption id=\"caption-attachment-117101\" class=\"wp-caption-text\">Firefox\u306eTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5909\u66f4<\/figcaption><\/figure>\n<h3>8. \u30b5\u30fc\u30d0\u30fc\u306eTLS\u8a2d\u5b9a\u3092\u5909\u66f4\u3059\u308b<\/h3>\n<p>\u5148\u307b\u3069\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u4f7f\u7528\u3059\u308bTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5909\u66f4\u3059\u308b\u65b9\u6cd5\u306f\u3054\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u308c\u3068\u306f\u5225\u306b\u3001\u30b5\u30fc\u30d0\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u5834\u5408\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u8a2d\u5b9a\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u3092\u30b9\u30de\u30fc\u30c8\u30ab\u30fc\u30c9\u30ea\u30fc\u30c0\u30fc\u306b\u4fdd\u7ba1\u3057\u3066\u3044\u308b\u5834\u5408\u3001TLS 1.2\u3057\u304b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u30ab\u30fc\u30c9\u30ea\u30fc\u30c0\u30fc\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\u3092\u5909\u66f4\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u30b5\u30fc\u30d0\u30fc\u306eTLS\u8a2d\u5b9a\u304cmin v.1.0\u306b\u306a\u3063\u3066\u3044\u305f\u3082\u306e\u3092\u3001\u5225\u306e\u30d5\u30e9\u30b0\u3092\u8ffd\u52a0\u3057\u3066max 1.2\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u305f\u3068\u3044\u3046\u4eba\u3082\u3044\u307e\u3059\u3002<\/p>\n<h3>9. Windows\u306e\u66f4\u65b0<\/h3>\n<p>\u3053\u308c\u304c\u6700\u5f8c\u306e\u30d2\u30f3\u30c8\u3067\u3059\u3002\u3053\u308c\u307e\u3067\u3054\u7d39\u4ecb\u3057\u305f\u89e3\u6c7a\u7b56\u304c\u3059\u3079\u3066\u5931\u6557\u3057\u305f\u3089\u3001Windows\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u66f4\u65b0\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002Windows\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u6700\u65b0\u306e\u3082\u306e\u3067\u306a\u3044\u3053\u3068\u3082\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3067\u3059\u3002<\/p>\n<p>\u3067\u304d\u308b\u9650\u308a\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3001\u3042\u308b\u3044\u306f\u5c11\u306a\u304f\u3068\u3082\u73fe\u5728\u4f7f\u7528\u3057\u3066\u3044\u308b\u3082\u306e\u3088\u308a\u3082\u65b0\u3057\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u66f4\u65b0\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u300c<strong>ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED<\/strong>\u300d\u306e\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u306b\u554f\u984c\u304c\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30a8\u30e9\u30fc\u304c\u539f\u56e0\u3067\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3084\u30b9\u30de\u30fc\u30c8\u30ab\u30fc\u30c9\u30ea\u30fc\u30c0\u30fc\u306b\u4fdd\u7ba1\u3057\u3066\u3044\u308bSSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u304c\u4f7f\u7528\u3067\u304d\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u89e3\u6c7a\u65b9\u6cd5\u306f\u3001\u5927\u304d\u304f\u5206\u3051\u30662\u3064\u3002<\/p>\n<ol>\n<li>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001macOS\u306e\u30ad\u30fc\u30c1\u30a7\u30fc\u30f3\u30a2\u30af\u30bb\u30b9\u30a2\u30d7\u30ea\u3001VPN\u306a\u3069\u3001\u63a5\u7d9a\u3092\u5e72\u6e09\u3057\u3066\u3044\u308b\u3082\u306e\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b<\/li>\n<li>\u4f7f\u7528\u3057\u3066\u3044\u308bTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u53e4\u3059\u304e\u308b\u3001\u307e\u305f\u306f\u65b0\u3057\u3059\u304e\u308b\u53ef\u80fd\u6027\u3092\u691c\u8a0e\u3059\u308b<\/li>\n<\/ol>\n<p>\u305d\u306e\u4ed6\u306eSSL\u30a8\u30e9\u30fc\u306b\u3064\u3044\u3066\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/ssl-connection-error\/\">\u69d8\u3005\u306a\u30d6\u30e9\u30a6\u30b6\u3068\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3067\u306eSSL\u63a5\u7d9a\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b8\u3064\u306e\u65b9\u6cd5<\/a>\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001\u4ee5\u4e0b\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u30fb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u306e\u3055\u307e\u3056\u307e\u306aSSL\u30a8\u30e9\u30fc\u306b\u3064\u3044\u3066\u3082\u89e3\u8aac\u8a18\u4e8b\u3092\u3054\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/kinsta.com\/jp\/blog\/err_ssl_obsolete_version\/\">Chrome\u300cERR_SSL_OBSOLETE_VERSION\u300d\u8b66\u544a\u901a\u77e5\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/kinsta.com\/jp\/blog\/err_ssl_protocol_error\/\">\u300cERR_SSL_PROTOCOL_ERROR\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/kinsta.com\/jp\/blog\/err_ssl_version_or_cipher_mismatch\/\">\u300cERR_SSL_VERSION_OR_CIPHER_MISMATCH\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/kinsta.com\/jp\/blog\/neterr-cert-authority-invalid\/\">\u300cNET::ERR_CERT_AUTHORITY_INVALID\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/a><\/li>\n<li><a href=\"https:\/\/kinsta.com\/blog\/net-err_cert_date_invalid\/\">\u301010\u306e\u65b9\u6cd5\u3011\u300cNET::ERR_CERT_DATE_INVALID\u300d\u30a8\u30e9\u30fc\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>SSL\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u3092\u4f7f\u3063\u3066\u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a &#8230;<\/p>\n","protected":false},"author":117,"featured_media":37111,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[754,769],"class_list":["post-37110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-chrome-errors","topic-firefox-errors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u300cERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5<\/title>\n<meta name=\"description\" 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