{"id":33167,"date":"2026-03-12T16:16:36","date_gmt":"2026-03-12T16:16:36","guid":{"rendered":"https:\/\/www.dotcom-monitor.com\/blog\/lets-encrypt-45-day-certificate-expiration\/"},"modified":"2026-08-11T10:27:50","modified_gmt":"2026-08-11T10:27:50","slug":"lets-encrypt-45-day-certificate-expiration","status":"publish","type":"post","link":"https:\/\/www.dotcom-monitor.com\/blog\/ja\/lets-encrypt-45-day-certificate-expiration\/","title":{"rendered":"Let\u2019s Encrypt 45\u65e5\u9593\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9650\u5207\u308c\uff1a\u76e3\u8996\u3068\u305d\u306e\u4ed6"},"content":{"rendered":"\t\t
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TLS\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9593\u306f\u6025\u901f\u306b\u77ed\u7e2e\u3055\u308c\u3066\u304a\u308a\u3001\u3053\u308c\u306b\u3088\u308a\u3059\u3079\u3066\u306e\u7d44\u7e54\u304c\u66f4\u65b0\u3001\u691c\u8a3c\u3001\u304a\u3088\u3073\u969c\u5bb3\u9632\u6b62\u306e\u65b9\u6cd5\u3092\u5909\u66f4\u3057\u3066\u3044\u307e\u3059\u3002Let’s Encrypt\u306f\u300190\u65e5\u9593\u306e\u8a3c\u660e\u66f8\u304b\u308945\u65e5\u9593\u306e\u8a3c\u660e\u66f8\u3078\uff08\u6bb5\u968e\u7684\u306a\u30ed\u30fc\u30eb\u30a2\u30a6\u30c8\u3067\uff09\u79fb\u884c\u3057\u3001\u8a8d\u53ef\u306e\u518d\u5229\u7528\u671f\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u540c\u6642\u306b\u3001CA\/Browser Forum\u306e\u6295\u7968SC-081v3<\/a>\u306f\u3001\u6700\u7d42\u7684\u306b2029\u5e743\u670815\u65e5\u307e\u3067\u306b\u516c\u958bTLS\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9593\u309247\u65e5\u306b\u5236\u9650\u3059\u308b\u3001\u3088\u308a\u5e83\u7bc4\u306a\u696d\u754c\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u3092\u63a1\u7528\u3057\u307e\u3057\u305f\u3002<\/p>

\u6570\u5341\u307e\u305f\u306f\u6570\u5343\u306e\u8a3c\u660e\u66f8\u3092\u7ba1\u7406\u3059\u308b\u30c1\u30fc\u30e0\u306b\u3068\u3063\u3066\u3001\u672c\u5f53\u306e\u554f\u984c\u306f\u300c\u77ed\u3044\u8a3c\u660e\u66f8\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u66f4\u65b0\u306e\u901f\u5ea6\u5411\u4e0a\u3001\u691c\u8a3c\u306e\u518d\u5229\u7528\u5236\u9650\u306e\u5f37\u5316\u3001\u305d\u3057\u3066\u904b\u7528\u30df\u30b9\u306e\u8a31\u5bb9\u7bc4\u56f2\u306e\u5927\u5e45\u306a\u7e2e\u5c0f<\/strong>\u3067\u3059\u3002\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u76e3\u8996\u3068\u30a2\u30e9\u30fc\u30c8\u306f\u5fc5\u8981\u4e0d\u53ef\u6b20\u306b\u306a\u308a\u307e\u3059\u3002<\/p>

SSL\/TLS\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9593\u306b\u304a\u3051\u308b\u5909\u66f4\u70b9\u3068\u306f\uff1f<\/h2>

45\u65e5\u9593\u306e\u30dd\u30ea\u30b7\u30fc\uff08Let’s Encrypt\uff09<\/h3>

Let’s Encrypt\u306f\u73fe\u572890\u65e5\u9593\u6709\u52b9\u306a\u8a3c\u660e\u66f8\u3092\u767a\u884c\u3057\u3066\u304a\u308a\u30012028\u5e74\u307e\u3067\u306b\u3053\u308c\u309245\u65e5\u306b\u77ed\u7e2e\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u7a81\u7136\u306e\u300c\u30b9\u30a4\u30c3\u30c1\u5207\u308a\u66ff\u3048\u300d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002Let’s Encrypt\u306fACME\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb<\/strong>\u3092\u4f7f\u3044\u6bb5\u968e\u7684\u306b\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\u65e5\u4ed8<\/div><\/div><\/div><\/th>
\u5909\u66f4\u5185\u5bb9<\/div><\/div><\/div><\/th>
\u8a8d\u53ef\u306e\u518d\u5229\u7528\u671f\u9593<\/div><\/div><\/div><\/th>
\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb<\/div><\/div><\/div><\/th><\/tr><\/thead>\n\t\t\t\t\t\t\t\t
2026\u5e745\u670813\u65e5<\/span> \u30d5\u30a7\u30fc\u30ba1<\/span><\/div><\/div><\/div><\/td>
\u30aa\u30d7\u30c8\u30a4\u30f3\u306etlsserver<\/code>\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c45\u65e5\u9593\u306e\u8a3c\u660e\u66f8\u3092\u767a\u884c<\/div><\/div><\/div><\/td>
30\u65e5\uff08\u5909\u66f4\u306a\u3057\uff09<\/div><\/div><\/div><\/td>
\u521d\u671f\u5c0e\u5165\u8005\/\u30c6\u30b9\u30c8<\/div><\/div><\/div><\/td><\/tr>
2027\u5e742\u670810\u65e5<\/span> \u30d5\u30a7\u30fc\u30ba2<\/span><\/div><\/div><\/div><\/td>
\u30c7\u30d5\u30a9\u30eb\u30c8\u306eclassic<\/code>\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c64\u65e5\u9593\u306e\u8a3c\u660e\u66f8\u306b\u79fb\u884c<\/div><\/div><\/div><\/td>
10\u65e5\u9593<\/strong>\u306b\u77ed\u7e2e<\/div><\/div><\/div><\/td>
tlsserver<\/code>\u307e\u305f\u306fshortlived<\/code>\u4ee5\u5916\u306e\u5168\u30e6\u30fc\u30b6\u30fc<\/div><\/div><\/div><\/td><\/tr>
2028\u5e742\u670816\u65e5<\/span> \u30d5\u30a7\u30fc\u30ba3<\/span><\/div><\/div><\/div><\/td>
\u30c7\u30d5\u30a9\u30eb\u30c8\u306eclassic<\/code>\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c45\u65e5\u9593\u306e\u8a3c\u660e\u66f8\u306b\u79fb\u884c<\/div><\/div><\/div><\/td>
7\u6642\u9593<\/strong>\u306b\u77ed\u7e2e<\/div><\/div><\/div><\/td>
\u30c7\u30d5\u30a9\u30eb\u30c8\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u5168\u30e6\u30fc\u30b6\u30fc<\/div><\/div><\/div><\/td><\/tr><\/tbody>\n\t\t\t<\/table>\n\t\t<\/div>\n\n\t\t<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8<\/strong><\/p>

\u8a8d\u53ef\u306e\u518d\u5229\u7528\u671f\u9593\u306f\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9593\u81ea\u4f53\u3068\u540c\u3058\u304f\u3089\u3044\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u4ee5\u524d\u306e\u30c9\u30e1\u30a4\u30f3\u7ba1\u7406\u691c\u8a3c\u3092\u518d\u5229\u7528\u3057\u3066\u8ffd\u52a0\u306e\u8a3c\u660e\u66f8\u3092\u767a\u884c\u3067\u304d\u308b\u6642\u9593\u7a93\u3067\u3059\u3002Let’s Encrypt\u306f\u3053\u308c\u309230\u65e5\u304b\u30892028\u5e74\u307e\u3067\u306b\u308f\u305a\u304b7\u6642\u9593\u306b\u77ed\u7e2e\u3059\u308b\u305f\u3081\u3001\u78ba\u5b9f\u306aACME\u81ea\u52d5\u5316\u304c\u5fc5\u9808\u3068\u306a\u308a\u307e\u3059\u3002\u4efb\u610f\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\u696d\u754c\u6a19\u6e96\uff1a47\u65e5\uff08CA\/Browser Forum\uff09<\/h3>

CA\/Browser Forum\u306e\u6295\u7968SC-081v3\u306f\u3001\u516c\u958bTLS\u8a3c\u660e\u66f8\u306e\u6700\u5927\u6709\u52b9\u671f\u9593\u3092\u6bb5\u968e\u7684\u306b\u7e2e\u5c0f\u3059\u308b\u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u3092\u5c0e\u5165\u3057\u307e\u3057\u305f\u3002200\u65e5\uff082026\u5e74\uff09\u3001<\/strong>100\u65e5\uff082027\u5e74\uff09\u3001<\/strong>\u305d\u3057\u306647\u65e5\uff082029\u5e74\uff09<\/strong>\u3067\u3059\u3002<\/p>

Let’s Encrypt\u306e\u300c45\u65e5\u300d\u306f\u696d\u754c\u306e\u300c47\u65e5\u300d\u306e\u6700\u5927\u5024\u3068\u5b8c\u5168\u306b\u4e92\u63db\u6027\u304c\u3042\u308a\u3001Let’s Encrypt\u306fCA\/B Forum\u306e\u8981\u6c42\u3088\u308a1\u5e74\u65e9\u304f\u3053\u306e\u6700\u7d42\u72b6\u614b\u306b\u5230\u9054\u3059\u308b\u4e88\u5b9a\u3067\u3059\u3002<\/p>

\u306a\u305c\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u671f\u9593\u304c\u77ed\u7e2e\u3055\u308c\u3066\u3044\u308b\u306e\u304b\uff1f<\/h2>

\u6709\u52b9\u671f\u9593\u306e\u77ed\u7e2e\u306f\u30014\u3064\u306e\u76f8\u4e92\u306b\u95a2\u9023\u3057\u305f\u76ee\u6a19\u306b\u3088\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u56de\u5fa9\u529b\u306e\u5f37\u5316\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>