{"id":22608,"date":"2019-03-12T03:14:52","date_gmt":"2019-03-12T10:14:52","guid":{"rendered":"https:\/\/kinqsta.com\/?post_type=knowledgebase&#038;p=12293"},"modified":"2025-10-02T04:52:50","modified_gmt":"2025-10-01T19:52:50","slug":"err_ssl_version_or_cipher_mismatch","status":"publish","type":"post","link":"https:\/\/kinqsta.com\/jp\/blog\/err_ssl_version_or_cipher_mismatch\/","title":{"rendered":"\u300cERR_SSL_VERSION_OR_CIPHER_MISMATCH\u300d\u30a8\u30e9\u30fc\u306e\u89e3\u6c7a\u65b9\u6cd5"},"content":{"rendered":"<p>HTTPS\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u3001\u30d6\u30e9\u30a6\u30b6\u30fc\u3068\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u306e\u9593\u3067\u8a3c\u660e\u66f8\u3068SSL\/TLS\u63a5\u7d9a\u304c\u6709\u52b9\u3067\u3042\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u624b\u9806\u304c\u884c\u308f\u308c\u307e\u3059\u3002\u3053\u306e\u624b\u9806\u306b\u306f\u3001TLS\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3001\u8a3c\u660e\u66f8\u306e\u8a8d\u8a3c\u5c40\u3068\u306e\u78ba\u8a8d\u3001\u8a3c\u660e\u66f8\u306e\u5fa9\u53f7\u5316\u306a\u3069\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u8a2d\u5b9a\u304c\u9593\u9055\u3063\u3066\u3044\u308b\u3053\u3068\u3001\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u4f7f\u7528\u306a\u3069\u7570\u5e38\u306a\u72b6\u614b\u304c\u691c\u51fa\u3055\u308c\u308b\u3068\u3001\u30d6\u30e9\u30a6\u30b6\u30fc\u306b\u6b21\u306e\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\uff1a\u300cERR_SSL_VERSION_OR_CIPHER_MISMATCH\u300d\u3002<\/p>\n<p>\u3053\u306e\u7570\u5e38\u304c\u767a\u751f\u3059\u308b\u3068\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u51e6\u7406\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u4e0b\u8a18\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>ERR_SSL_VERSION_OR_CIPHER_MISMATCH\u306e\u539f\u56e0\u306b\u3064\u3044\u3066<\/h2>\n<p>ERR_SSL_VERSION_OR_CIPHER_MISMATCH\u30a8\u30e9\u30fc\u306f\u3088\u304f\u767a\u751f\u3059\u308b\u306e\u3001\u53e4\u3044\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u307e\u305f\u306f\u30d6\u30e9\u30a6\u30b6\u30fc\u3067\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u5fc5\u305a\u3057\u3082\u305d\u3046\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u5b9f\u306f\u3001\u4ed6\u306e\u30b5\u30fc\u30d0\u30fc\u4f1a\u793e\u304b\u3089\u6700\u8fd1Kinsta\u306b\u79fb\u884c\u3057\u3066\u304d\u305f\u304a\u5ba2\u69d8\u306eWordPress\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3067\u3082\u672c\u7570\u5e38\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002\u5f53\u793e\u306f\u3082\u3061\u308d\u3093\u3001Chrome\u306e\u6700\u65b0\u7248\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u70ba\u3001SSL\u8a3c\u660e\u66f8\u306b\u95a2\u3059\u308b\u7570\u5e38\u306b\u9055\u3044\u3042\u308a\u307e\u305b\u3093\u3002Chrome\u306f\u8aad\u307f\u8fbc\u307f\u3092\u5b9f\u65bd\u3057\u306a\u3044\u3053\u3068\u306b\u3088\u308a\u30e6\u30fc\u30b6\u30fc\u3092\u4fdd\u8b77\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1195px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/sites\/6\/2017\/07\/err_ssl_version_or_cipher_mismatch.png\" alt=\"ERR_SSL_VERSION_OR_CIPHER_MISMATCH\" width=\"1195\" height=\"580\"><figcaption class=\"wp-caption-text\">ERR_SSL_VERSION_OR_CIPHER_MISMATCH<\/figcaption><\/figure>\n<h3>\u672c\u30a8\u30e9\u30fc\u306e\u6b21\u306e\u3088\u3046\u306a\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/h3>\n<ul>\n<li>113\u30a8\u30e9\u30fc\u3000(net::err_ssl_version_or_cipher_mismatch): unknown error<\/li>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u3067\u5171\u901a\u306eSSL\u30d7\u30ed\u30c8\u30b3\u30eb \u30d0\u30fc\u30b8\u30e7\u30f3\u307e\u305f\u306f\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u305b\u3093<\/li>\n<\/ul>\n<p>\u8003\u3048\u3089\u308c\u308b\u767a\u751f\u539f\u56e0\u3068\u51e6\u7406\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u4e0b\u8a18\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li><a href=\"#check-ssl-certificate\">SSL\u8a3c\u660e\u66f8\u3092\u78ba\u8a8d\u3059\u308b<\/a><\/li>\n<li><a href=\"#certificate-name-mismatch\">\u8a3c\u660e\u66f8\u540d\u306e\u4e0d\u4e00\u81f4\u3092\u78ba\u8a8d\u3059\u308b<\/a><\/li>\n<li><a href=\"#old-tls-version\">TLS\u306e\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u78ba\u8a8d\u3059\u308b<\/a><\/li>\n<li><a href=\"#rc4-cipher-suite\">RC4\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u3092\u78ba\u8a8d\u3059\u308b<\/a><\/li>\n<li><a href=\"#clear-ssl-state\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eSSL\u72b6\u614b\u3092\u30af\u30ea\u30a2\u3059\u308b<\/a><\/li>\n<li><a href=\"#new-operating-system\">\u65b0\u3057\u3044\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u7528\u3059\u308b<\/a><\/li>\n<li><a href=\"#disable-antivirus\">\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u3092\u4e00\u6642\u7684\u306b\u7121\u52b9\u306b\u3059\u308b<\/a><\/li>\n<\/ul>\n<h3 id=\"check-ssl-certificate\">SSL\u8a3c\u660e\u66f8\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u672c\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u305f\u5834\u5408\u3001\u307e\u305a\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u8a3c\u660e\u66f8<a href=\"https:\/\/kinqsta.com\/blog\/ssl-check\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u306eSSL\u30c1\u30a7\u30c3\u30af<\/a>\u3092\u884c\u3063\u305f\u65b9\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u305d\u3053\u3067\u3001Qualys SSL Labs\u306e<a href=\"https:\/\/www.ssllabs.com\/ssltest\/analyze.html\" target=\"_blank\" rel=\"noopener noreferrer\">\u7121\u6599\u306eSSL\u78ba\u8a8d\u30c4\u30fc\u30eb<\/a>\u306e\u4f7f\u7528\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u4fe1\u983c\u6027\u304c\u975e\u5e38\u306b\u9ad8\u3044\u70ba\u3001\u5f53\u793e\u304c\u8a3c\u660e\u66f8\u3092\u691c\u8a3c\u3059\u308b\u3068\u304d\u306b\u3059\u3079\u3066\u306e\u304a\u5ba2\u69d8\u3092\u5bfe\u8c61\u306b\u3053\u306e\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30c9\u30e1\u30a4\u30f3\u3092\u300cHostname\u300d\uff08\u30db\u30b9\u30c8\u540d\uff09\u6b04\u306b\u5165\u529b\u3057\u3001\u300cSubmit\u300d\uff08\u63d0\u51fa\uff09\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<p>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30d1\u30d6\u30ea\u30c3\u30af\u306a\u7d50\u679c\u3092\u975e\u8868\u793a\u306b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u4e0a\u306e\u30b5\u30a4\u30c8\u306eSSL\/TLS\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u30b9\u30ad\u30e3\u30f3\u3059\u308b\u306e\u306b1\u301c2\u5206\u304b\u304b\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_12376\" aria-describedby=\"caption-attachment-12376\" style=\"width: 1909px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-12376 size-full\" src=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/2017\/08\/check-ssl-certificate-1-1.png\" alt=\"SSL\u8a3c\u660e\u66f8\u3092\u78ba\u8a8d\u3059\u308b - ERR_SSL_VERSION_OR_CIPHER_MISMATCH\" width=\"1909\" height=\"1359\"><figcaption id=\"caption-attachment-12376\" class=\"wp-caption-text\">SSL\u8a3c\u660e\u66f8\u3092\u78ba\u8a8d\u3059\u308b<\/figcaption><\/figure>\n<h3 id=\"certificate-name-mismatch\">\u8a3c\u660e\u66f8\u540d\u306e\u4e0d\u4e00\u81f4\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u4e0a\u8a18\u306e\u7279\u5b9a\u306e\u4f8b\u3067\u306f\u3001Kinsta\u306b\u79fb\u884c\u3057\u305f\u304a\u5ba2\u69d8\u306e<strong>\u8a3c\u660e\u66f8\u540d\u304c\u4e00\u81f4\u3057\u3066\u3044\u306a\u304b\u3063\u305f<\/strong>\u70ba\u3001ERR_SSL_VERSION_OR_CIPHER_MISMATCH\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002\u4e0b\u8a18\u306eSSL Labs\u306e\u8a66\u9a13\u306e\u753b\u9762\u304b\u3089\u3082\u308f\u304b\u308b\u306b\u3001\u5272\u3068\u901f\u304f\u7279\u5b9a\u3067\u304d\u308b\u7570\u5e38\u539f\u56e0\u3067\u3059\u3002SSL Labs\u306b\u3088\u308b\u3068\u3001\u4e0d\u4e00\u81f4\u3068\u3044\u3063\u3066\u3082\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30ab\u30c6\u30b4\u30ea\u30fc\u306b\u5206\u304b\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n<ul style=\"margin-left: 30px\">\n<li>\u3053\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u306fSSL\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001SSL\u306e\u3042\u308b\u4ed6\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u5171\u6709\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u3053\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306f\u3082\u3046\u5b58\u5728\u3057\u307e\u305b\u3093\u304c\u3001\u30c9\u30e1\u30a4\u30f3\u306f\u73fe\u5728\u5225\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u3042\u308b\u53e4\u3044IP\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u3057\u3066\u3044\u308b\u307e\u307e\u3067\u3059\u3002<\/li>\n<li>\u3053\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306fSSL\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08CDN\uff09\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>\u30c9\u30e1\u30a4\u30f3\u540d\u306f\u540d\u524d\u306e\u7570\u306a\u308b\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u30a8\u30a4\u30ea\u30a2\u30b9\u3067\u3059\u304c\u3001\u30a8\u30a4\u30ea\u30a2\u30b9\u306f\u8a3c\u660e\u66f8\u306b\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<figure style=\"width: 1894px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/sites\/6\/2017\/08\/certificate-name-mismatch-1.png\" alt=\"\u8a3c\u660e\u66f8\u540d\u306e\u4e0d\u4e00\u81f4\" width=\"1894\" height=\"1552\"><figcaption class=\"wp-caption-text\">\u8a3c\u660e\u66f8\u540d\u306e\u4e0d\u4e00\u81f4<\/figcaption><\/figure>\n<p>\u8a3c\u660e\u66f8\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u306e\u8ab2\u984c\u3092\u78ba\u8a8d\u3059\u308b\u3082\u3046\u4e00\u3064\u306e\u7c21\u5358\u306a\u65b9\u6cd5\u306f\u3001\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066Chrome\u306eDevTools\u3092\u958b\u304f\u3053\u3068\u3067\u3059\u3002\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u597d\u304d\u306a\u5834\u6240\u3092\u53f3\u30af\u30ea\u30c3\u30af\u3057\u3001\u300c\u691c\u8a3c\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u300c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u300d\u30bf\u30d6\u3092\u30af\u30ea\u30c3\u30af\u3057\u300c\u8a3c\u660e\u66f8\u306e\u8868\u793a\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u304c\u8a3c\u660e\u66f8\u60c5\u5831\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u306f\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u73fe\u5728\u306e\u30c9\u30e1\u30a4\u30f3\u3068\u4e00\u81f4\u3057\u306a\u3044\u3068\u3001\u3053\u308c\u306f\u554f\u984c\u3067\u3059\u3002<\/p>\n<p><span data-sheets-value=\"{\"1\":2,\"2\":\"[inarticle-cta]\"}\" data-sheets-userformat=\"{\"2\":6659,\"3\":{\"1\":0},\"4\":{\"1\":2,\"2\":16777215},\"12\":0,\"14\":{\"1\":2,\"2\":0},\"15\":\"Roboto, RobotoDraft, Helvetica, Arial, sans-serif\"}\"><\/span><\/p>\n<figure style=\"width: 1384px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/sites\/6\/2017\/08\/check-domain-ssl-certificate-1.png\" alt=\"SSL\u8a3c\u660e\u66f8\u306e\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u3092\u78ba\u8a8d\u3059\u308b\" width=\"1384\" height=\"912\"><figcaption class=\"wp-caption-text\">SSL\u8a3c\u660e\u66f8\u306e\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u3092\u78ba\u8a8d\u3059\u308b<\/figcaption><\/figure>\n<p>\u3082\u3061\u308d\u3093\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u8a3c\u660e\u66f8\u306a\u3069\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u4e00\u822c\u7684\u306a\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3067\u306f\u3053\u306e2\u3064\u306f\u5b8c\u5168\u306b\u4e00\u81f4\u3059\u308b\u306f\u305a\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u4eca\u56de\u306e\u4f8b\u3067\u306f\u3001ERR_SSL_VERSION_OR_CIPHER_MISMATCH\u30a8\u30e9\u30fc\u306e\u305f\u3081\u3001Chrome\u306eDevTools\u3092\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u305d\u3053\u3067SSL Labs\u306a\u3069\u306e\u306a\u30c4\u30fc\u30eb\u306f\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<h3 id=\"old-tls-version\">TLS\u306e\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u3082\u3046\u4e00\u3064\u306e\u8003\u3048\u3089\u308c\u308b\u7406\u7531\u306f\u3001\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308bTLS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u53e4\u3044\u3053\u3068\u3067\u3059\u3002TLS 1.2\u4ee5\u4e0a\uff0a\uff08\u307e\u305f\u306f<a href=\"https:\/\/kinqsta.com\/jp\/blog\/tls-1-3\/\">TLS 1.3<\/a>\uff09\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u3053\u3068\u306f\u7406\u60f3\u7684\u3067\u3059\u3002Kinsta\u306e\u304a\u5ba2\u69d8\u306e\u3042\u306a\u305f\u306a\u3089\u3001\u5f53\u793e\u306e\u30b5\u30fc\u30d0\u306f\u5e38\u306b\u6700\u65b0\u304b\u3064\u6700\u9ad8\u306e\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u70ba\u3001\u3054\u5fc3\u914d\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002<strong>Kinsta\u306e\u30b5\u30fc\u30d0\u30fc\u3082Kinsta CDN\u3082TLS 1.3\u5bfe\u5fdc\u3067\u3059\u3002<\/strong>Cloudflare\u3082\u30c7\u30d5\u30a9\u30eb\u30c8\u3067TLS 1.3\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\uff08\u53c2\u7167\u6587\u732e\uff1a\u5f93\u6765\u306eTLS\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u3054\u5229\u7528\u306e\u5834\u5408\u306f\u3001Chrome\u306e<a href=\"https:\/\/kinqsta.com\/jp\/blog\/err_ssl_obsolete_version\/\">ERR_SSL_OBSOLETE_VERSION<\/a> \u901a\u77e5\u3092\u4fee\u6b63\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\uff09<\/p>\n<p>SSL Labs\u30c4\u30fc\u30eb\u306f\u3053\u3053\u3067\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u8a2d\u5b9a\u30e1\u30cb\u30e5\u30fc\u3067\u306f\u3001\u8a72\u5f53\u306e\u8a3c\u660e\u66f8\u304c\u4ed8\u3044\u3066\u3044\u308b\u30b5\u30fc\u30d0\u306eTLS\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306a\u3089\u3001\u3054\u5229\u7528\u306e\u30b5\u30fc\u30d0\u30fc\u4f1a\u793e\u306b\u9023\u7d61\u3057\u3001TLS\u3092\u66f4\u65b0\u3057\u3066\u3082\u3089\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<figure id=\"attachment_30566\" aria-describedby=\"caption-attachment-30566\" style=\"width: 2099px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-30566\" src=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/2016\/10\/tls-1.3-server-test.png\" alt=\"TLS 1.3\u5bfe\u5fdc\u306e\u30b5\u30fc\u30d0\u30fc\" width=\"2099\" height=\"635\"><figcaption id=\"caption-attachment-30566\" class=\"wp-caption-text\">TTLS 1.3\u5bfe\u5fdc\u306e\u30b5\u30fc\u30d0\u30fc<\/figcaption><\/figure>\n<h3 id=\"rc4-cipher-suite\">RC4\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>Google\u306e<a href=\"https:\/\/support.google.com\/chrome\/a\/answer\/6357171?hl=en\" target=\"_blank\" rel=\"noopener noreferrer\">ERR_SSL_VERSION_OR_CIPHER_MISMATCH<\/a>\u306b\u95a2\u3059\u308b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u3088\u308b\u3068\u3001\u672c\u30a8\u30e9\u30fc\u306e\u3082\u30461\u3064\u306e\u7406\u7531\u306f\u3001Chrome48\u3067RC4\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u304c\u524a\u9664\u3055\u308c\u305f\u3053\u3068\u3067\u3059\u3002\u3088\u304f\u3042\u308b\u7406\u7531\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001RC4\u3092\u5fc5\u8981\u3068\u3059\u308b\u5927\u898f\u6a21\u4f01\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3067\u306f\u8d77\u3053\u308a\u5f97\u307e\u3059\u3002\u306a\u305c\u3067\u3057\u3087\u3046\u304b\u3002\u898f\u6a21\u3067\u3088\u308a\u8907\u96d1\u306a\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u304a\u3088\u3073\u66f4\u65b0\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u7a76\u8005\u3001Google\u3001\u304a\u3088\u3073Microsoft\u306f\u3001<a href=\"https:\/\/blogs.technet.microsoft.com\/srd\/2013\/11\/12\/security-advisory-2868725-recommendation-to-disable-rc4\/\" target=\"_blank\" rel=\"noopener noreferrer\">RC4\u3092\u7121\u52b9\u306b\u3059\u308b<\/a>\u3053\u3068\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30b5\u30fc\u30d0\u30fc\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u5225\u306e\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3088\u3046\u306b\u3057\u305f\u65b9\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002\u73fe\u5728\u3054\u5229\u7528\u306e\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u306fSSL Labs\u30c4\u30fc\u30eb\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\uff08\u4e0b\u8a18\u53c2\u7167\uff09\u3002<\/p>\n<figure style=\"width: 1666px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/sites\/6\/2017\/08\/cipher-suites.png\" alt=\"\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\" width=\"1666\" height=\"771\"><figcaption class=\"wp-caption-text\">\u6697\u53f7\u30b9\u30a4\u30fc\u30c8<\/figcaption><\/figure>\n<h3 id=\"clear-ssl-state\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eSSL\u72b6\u614b\u3092\u30af\u30ea\u30a2\u3059\u308b<\/h3>\n<p>Chrome\u306eSSL\u72b6\u614b\u3092\u30af\u30ea\u30a2\u3059\u308b\u3053\u3068\u3082\u8a66\u3057\u3066\u307f\u308b\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002<a href=\"https:\/\/kinqsta.com\/blog\/how-to-clear-owser-cache\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u30d6\u30e9\u30a6\u30b6\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30af\u30ea\u30a2\u3059\u308b<\/a>\u306e\u3068\u540c\u69d8\u306b\u3001\u540c\u671f\u304c\u3068\u308c\u306a\u304f\u306a\u3063\u305f\u5834\u5408\u306b\u5f79\u7acb\u3064\u624b\u6bb5\u3067\u3059\u3002Windows\u3067Chrome\u306eSSL\u306e\u72b6\u614b\u3092\u30af\u30ea\u30a2\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul style=\"margin-left: 30px\">\n<li>Google Chrome\u306e\u8a2d\u5b9a\u30a2\u30a4\u30b3\u30f3\uff08\u8a2d\u5b9a\uff09\u3092\u30af\u30ea\u30c3\u30af\u3057\u3001\u300c\u8a2d\u5b9a\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/li>\n<li>\u300c\u8a73\u7d30\u8a2d\u5b9a\u3092\u8868\u793a\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/li>\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3001\u30d7\u30ed\u30ad\u30b7\u8a2d\u5b9a\u306e\u5909\u66f4\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u30c0\u30a4\u30a2\u30ed\u30b0\u30dc\u30c3\u30af\u30b9\u304c\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>\u300c\u30b3\u30f3\u30c6\u30f3\u30c4\u300d\u30bf\u30d6\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/li>\n<li>\u300cSSL\u72b6\u614b\u306e\u30af\u30ea\u30a2\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u300cOK\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059<\/li>\n<li>Chrome\u3092\u518d\u8d77\u52d5\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<figure style=\"width: 668px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/sites\/6\/2017\/08\/clear-ssl-state-chrome-windows.png\" alt=\"Windows\u3067Chrome\u306eSSL\u306e\u72b6\u614b\u3092\u30af\u30ea\u30a2\u3059\u308b\" width=\"668\" height=\"918\"><figcaption class=\"wp-caption-text\">Windows\u3067Chrome\u306eSSL\u306e\u72b6\u614b\u3092\u30af\u30ea\u30a2\u3059\u308b<\/figcaption><\/figure>\n<p>Mac\u3092\u3054\u5229\u7528\u306e\u65b9\u306f\u3001SSL\u8a3c\u660e\u66f8\u3092\u524a\u9664\u3059\u308b\u624b\u9806\u306b\u3064\u3044\u3066<a href=\"http:\/\/lists.gno.org\/cert-maint-mac-10.5.8\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u3053\u3061\u3089<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3 id=\"new-operating-system\">\u65b0\u3057\u3044\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n<p>\u53e4\u3044\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306f\u3001TLS 1.3\u3068\u3044\u3063\u305f\u6700\u65b0\u306e\u6697\u53f7\u30b9\u30a4\u30fc\u30c8\u306a\u3069\u306e\u65b0\u3057\u3044\u30c6\u30af\u30ce\u30ed\u304c\u73fe\u308c\u308b\u306b\u3064\u308c\u30d6\u30e9\u30a6\u30b6\u30fc\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u3055\u308c\u306a\u304d\u306a\u308a\u3001\u6642\u4ee3\u9045\u308c\u306b\u306a\u308a\u307e\u3059\u3002\u6700\u65b0\u306eSSL\u8a3c\u660e\u66f8\u306e\u7279\u5b9a\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u6a5f\u80fd\u3057\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Google Chrome\u306f\u30012015\u5e74\u306bWindows XP\u306e<a href=\"https:\/\/chrome.googleblog.com\/2015\/11\/updates-to-chrome-platform-support.html\" target=\"_blank\" rel=\"noopener noreferrer\">\u30b5\u30dd\u30fc\u30c8\u3092\u7d42\u4e86<\/a>\u3057\u307e\u3057\u305f\u3002\u53ef\u80fd\u306a\u304b\u304e\u308a\u3001Windows 10\u307e\u305f\u306fMac OS X\u306e\u6700\u65b0\u7248\u306a\u3069\u3001\u65b0\u3057\u3044\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u306b\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3 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