{"id":2824,"date":"2023-09-15T10:36:48","date_gmt":"2023-09-15T02:36:48","guid":{"rendered":"https:\/\/www.dottedsign.com\/ja\/blog\/?p=2824"},"modified":"2023-09-28T15:08:15","modified_gmt":"2023-09-28T07:08:15","slug":"esign-security-knowledge","status":"publish","type":"post","link":"https:\/\/www.dottedsign.com\/ja\/blog\/digital-transformation\/security\/esign-security-knowledge","title":{"rendered":"\u305d\u306e\u7f72\u540d\u306f\u5371\u967a!? \u96fb\u5b50\u7f72\u540d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306e\u305f\u3081\u306b\u77e5\u308a\u305f\u3044\u77e5\u8b58"},"content":{"rendered":"\r\n<p>\u3053\u3093\u306b\u3061\u306f\uff01Kdan\u30e9\u30a4\u30bf\u30fc\u306e\u6d25\u5c71\u3067\u3059\u3002\u6700\u8fd1\u3084\u3063\u3068\u4e16\u754c\u4e2d\u3067\u30b3\u30ed\u30ca\u5bfe\u7b56\u30ef\u30af\u30c1\u30f3\u306e\u666e\u53ca\u304c\u59cb\u307e\u308a\u3001\u5f90\u3005\u306b\u843d\u3061\u7740\u304d\u3092\u53d6\u308a\u623b\u3059\u6c17\u914d\u304c\u3042\u308a\u307e\u3059\u306d\uff01<\/p>\r\n\r\n\r\n\r\n<p>\u3057\u304b\u3057\u3001\u4eca\u56de\u306e\u30b3\u30ed\u30ca\u3092\u6a5f\u306b\u6025\u901f\u306b\u666e\u53ca\u3057\u305f\u66f8\u985e\u306e\u96fb\u5b50\u5316\u3084\u30d3\u30b8\u30cd\u30b9\u306b\u304a\u3051\u308be\u30b3\u30de\u30fc\u30b9\u5316\u306e\u6d41\u308c\u306f\u3001\u4eca\u5f8c\u3082\u5f15\u304d\u7d9a\u304d\u62e1\u5927\u3059\u308b\u3068\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002<br 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\/>EC\u53d6\u5f15\u3092\u59cb\u3081\u305f\u3044\u3001\u3042\u308b\u3044\u306f\u53d6\u5f15\u66f8\u985e\u3092\u96fb\u5b50\u5316\u3057\u305f\u3044\u3001\u3068\u3044\u3046\u4f01\u696d\u306e\u65b9\u306f\u5fc5\u898b\u3067\u3059\uff01<\/p>\r\n\r\n\r\n\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path 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class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u3068\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u96fb\u5b50\u5316\u3055\u308c\u305f\u6587\u66f8\u306b\u5bfe\u3057\u3066\u884c\u308f\u308c\u308b\u96fb\u5b50\u7684\u306a\u7f72\u540d\uff08\u30b5\u30a4\u30f3\uff09\u3067\u3001\u307e\u305f\u305d\u306e\u4e2d\u3067\u3082\u6cd5\u7684\u306b\u6b63\u5f53\u6027\u30fb\u5b89\u5168\u6027\u304c\u78ba\u4fdd\u3055\u308c\u305f\u3082\u306e\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>\u7d19\u6587\u66f8\u306e\u7f72\u540d\u3084\u62bc\u5370\u306b\u76f8\u5f53\u3059\u308b\u3082\u306e\u3067\u3001\u6cd5\u7684\u306b\u6709\u52b9\u306a\u96fb\u5b50\u6587\u66f8\u3092\u4f5c\u6210\u3059\u308b\u969b\u306b\u7d76\u5bfe\u306b\u6b20\u304b\u305b\u306a\u3044\u306e\u304c\u96fb\u5b50\u7f72\u540d\u3067\u3059\uff01<br \/>\u96fb\u5b50\u7f72\u540d\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u76f8\u624b\u306e\u78ba\u8a8d\u3001\u306a\u308a\u3059\u307e\u3057\u306e\u9632\u6b62\u3001\u6539\u3056\u3093\u306e\u9632\u6b62\u304c\u884c\u308f\u308c\u3001\u5b89\u5fc3\u3057\u3066\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u53d6\u5f15\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"900\" height=\"500\" class=\"wp-image-2826\" src=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u7f72\u540d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3900x500.jpg\" alt=\"\u96fb\u5b50\u7f72\u540d\u3068\u306f\r\n\" srcset=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u7f72\u540d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3900x500.jpg 900w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u7f72\u540d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3900x500-300x167.jpg 300w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u7f72\u540d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3900x500-768x427.jpg 768w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u7f72\u540d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3900x500-480x267.jpg 480w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%9B%BB%E5%AD%90%E7%BD%B2%E5%90%8D%E3%81%A8%E9%9B%BB%E5%AD%90%E3%82%B5%E3%82%A4%E3%83%B3%E3%81%AF%E9%81%95%E3%81%86\"><\/span>\u96fb\u5b50\u7f72\u540d\u3068\u96fb\u5b50\u30b5\u30a4\u30f3\u306f\u9055\u3046<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p><a href=\"https:\/\/www.soumu.go.jp\/main_sosiki\/joho_tsusin\/top\/ninshou-law\/law-index_a.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u96fb\u5b50\u7f72\u540d<\/a>\u306fPDF\u3067\u884c\u3046\u96fb\u5b50\u30b5\u30a4\u30f3\u3068\u306f\u7570\u306a\u308a\u307e\u3059\u3002\u96fb\u5b50\u7f72\u540d\u306f\u3001\u96fb\u5b50\u6587\u66f8\u3092\u6697\u53f7\u5316\u3057\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5b88\u308b\u5f79\u5272\u3092\u3082\u3061\u3001\u96fb\u5b50\u7f72\u540d\u3092\u3059\u308b\u3053\u3068\u3067<a href=\"http:\/\/www.moj.go.jp\/MINJI\/minji32-1.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u96fb\u5b50\u6587\u66f8\u306b\u6cd5\u7684\u6839\u62e0<\/a>\u3092\u4e0e\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u306e\u95a2\u9023\u6cd5\u306b\u3064\u3044\u3066\u306f\u4ee5\u524dKdan\u306e\u30d6\u30ed\u30b0\u3067\u3082\u8a73\u3057\u304f\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\r\n\r\n\r\n<div class=\"relevant-post custom-loop-list\">\n\t<fieldset>\n\t\t\t<div class=\"flex flex-wrap\">\n\t\t\t\t<div class=\"f-w-3\">\n\t\t\t\t\t<a href=\"https:\/\/www.dottedsign.com\/ja\/blog\/contract-esign\/benefits-electronic-contract-system\" target=\"_blank\">\n\t\t\t\t<img decoding=\"async\" width=\"400\" height=\"250\" src=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/02\/DottedSign_sign-on-iPad-400x250.jpg\" class=\"post-thumbnail aligncenter wp-post-image\" alt=\"\u96fb\u5b50\u5951\u7d04\u66f8 \u4f5c\u308a\u65b9\" srcset=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/02\/DottedSign_sign-on-iPad-400x250.jpg 400w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/02\/DottedSign_sign-on-iPad-1080x675.jpg 1080w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"f-w-9\">\n\t\t\t\t\t<span>\u95a2\u9023\u8a18\u4e8b<\/span>\n\t\t\t\t\t<a href=\"https:\/\/www.dottedsign.com\/ja\/blog\/contract-esign\/benefits-electronic-contract-system\" target=\"_blank\">\n\t\t\t\t\t\t<h4 class=\"entry-title\">\u30102021\u5e74\u3011\u96fb\u5b50\u5951\u7d04\u306e\u5c0e\u5165\u30e1\u30ea\u30c3\u30c8\u3068\u6ce8\u610f\u70b9\uff5c\u304a\u3059\u3059\u3081\u306e\u30b7\u30b9\u30c6\u30e0\u306e\u9078\u3073\u65b9\u3082\u7d39\u4ecb<\/h4>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div><!-- .flex -->\n\t<\/fieldset>\n<\/div><!-- .relevant-post -->\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u304c\u5fc5\u8981\u3068\u306a\u308b\u66f8\u985e\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u3084\u308a\u53d6\u308a\u3059\u308b\u5951\u7d04\u66f8\u3084\u8acb\u6c42\u66f8\u3001\u307e\u305f\u4f1a\u793e\u306e\u516c\u958b\u6587\u66f8\u3084\u91cd\u8981\u66f8\u985e\u7b49\u304c\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u53d6\u5f15\u306e\u5897\u52a0\u3001\u307e\u305f\u30b3\u30ed\u30ca\u306b\u3088\u308b\u30ea\u30e2\u30fc\u30c8\u30ef\u30fc\u30af\u306e\u4fc3\u9032\u306b\u3088\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u4ecb\u3057\u305f<a href=\"https:\/\/www.nta.go.jp\/law\/joho-zeikaishaku\/sonota\/jirei\/pdf\/0020006-168_03.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">\u96fb\u5b50\u53d6\u5f15<\/a>\u3084\u793e\u5185\u91cd\u8981\u66f8\u985e\u306e\u96fb\u5b50\u5316\u306f\u6025\u901f\u306b\u52a0\u901f\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\u4eca\u3084\u591a\u304f\u306e\u4f1a\u793e\u3067\u3001\u96fb\u5b50\u7f72\u540d\u306e\u5229\u7528\u306a\u3057\u306b\u306f\u30d3\u30b8\u30cd\u30b9\u304c\u6210\u7acb\u3057\u306a\u3044\u72b6\u6cc1\u3068\u306a\u308a\u3064\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"900\" height=\"500\" class=\"wp-image-2828\" src=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u30af\u3099\u30ed\u30fc\u30cf\u3099\u30eb\u306a\u53d6\u5f15-1.jpg\" alt=\"\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u53d6\u5f15\" srcset=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u30af\u3099\u30ed\u30fc\u30cf\u3099\u30eb\u306a\u53d6\u5f15-1.jpg 900w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u30af\u3099\u30ed\u30fc\u30cf\u3099\u30eb\u306a\u53d6\u5f15-1-300x167.jpg 300w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u30af\u3099\u30ed\u30fc\u30cf\u3099\u30eb\u306a\u53d6\u5f15-1-768x427.jpg 768w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u30af\u3099\u30ed\u30fc\u30cf\u3099\u30eb\u306a\u53d6\u5f15-1-480x267.jpg 480w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%9B%BB%E5%AD%90%E7%BD%B2%E5%90%8D%E3%81%A8%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3\"><\/span>\u96fb\u5b50\u7f72\u540d\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u6587\u66f8\u306f\u5b9f\u969b\u306e\u672c\u4eba\u78ba\u8a8d\u304c\u96e3\u3057\u3044\u305f\u3081\u3001\u306a\u308a\u3059\u307e\u3057\u8005\u306b\u3088\u308b\u30b5\u30a4\u30f3\u3084\u6539\u3056\u3093\u306e\u8105\u5a01\u304b\u3089\u5b88\u308b\u65b9\u6cd5\u304c\u5fc5\u8981\u3067\u3059\u3002<br \/>\u305d\u3053\u3067\u300c\u96fb\u5b50\u7f72\u540d\u300d\u304c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5b88\u308b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u96fb\u5b50\u7f72\u540d\u306e\u5f79\u5272\u3068\u6697\u53f7\u5316\u6280\u8853\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">\u96fb\u5b50\u7f72\u540d\u306e\u5f79\u5272<\/h3>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u3068\u306f\u3001\u4e00\u8a00\u3067\u8868\u3059\u3068\u300c\u79d8\u5bc6\u9375\u3092\u4f7f\u3063\u3066\u96fb\u5b50\u6587\u66f8\u3092\u6697\u53f7\u5316\u3057\u305f\u8a3c\u660e\u300d\u3067\u3059\u3002<br \/>\u96fb\u5b50\u53d6\u5f15\u3067\u306f\u3001\u96fb\u5b50\u6587\u66f8\u306e\u6cd5\u7684\u62c5\u4fdd\u53ca\u3073\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u78ba\u4fdd\u306e\u305f\u3081\u3001\u300c<a href=\"https:\/\/esac.jipdec.or.jp\/why-e-signature\/public-key-cryptography.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u516c\u958b\u9375\u6697\u53f7\u65b9\u5f0f<\/a>\u300d\u3092\u7528\u3044\u3066\u6587\u66f8\u3092\u9001\u4ed8\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u6cd5\u3067\u8a8d\u3081\u3089\u308c\u3066\u3044\u308b\u516c\u958b\u9375\u6697\u53f7\u65b9\u5f0f\u306b\u306f\uff13\u7a2e\u985e\uff08RSA\u6697\u53f7\u65b9\u5f0f\u3001DSA\u7f72\u540d\u65b9\u5f0f\u3001ECDAS\u7f72\u540d\u65b9\u5f0f\uff09\u3042\u308a\u307e\u3059\u304c\u3001\u6cd5\u7684\u52b9\u529b\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u9762\u304b\u3089\u3001\u4e00\u822c\u7684\u306b\u306f RSA\u6697\u53f7\u65b9\u5f0f\u304c\u4f7f\u308f\u308c\u307e\u3059\u3002<br \/>\u3053\u308c\u306f\u6697\u53f7\u5316\u3068\u5fa9\u5143\u3067\uff12\u3064\u306e\u7570\u306a\u308b\u9375\uff08\u516c\u958b\u9375\uff08Public Key\uff09\u3068\u79d8\u5bc6\u9375\uff08Private Key\uff09\uff09\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>RSA\u6697\u53f7\u65b9\u5f0f\u3067\u306f\u4e16\u754c\u306b1\u7d44\u3057\u304b\u306a\u3044\u516c\u958b\u9375\u3068\u79d8\u5bc6\u9375\u3001\u96fb\u5b50\u7f72\u540d\u306b\u3088\u308b\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306b\u3088\u308a\u3001\u96fb\u5b50\u6587\u66f8\u3092\u6539\u3056\u3093\u3084\u306a\u308a\u3059\u307e\u3057\u8005\u306b\u3088\u308b\u30b5\u30a4\u30f3\u304b\u3089\u5b88\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\u96fb\u5b50\u7f72\u540d\u306f\u3053\u306e\u300c\u79d8\u5bc6\u9375\u300d\u306b\u3088\u308a\u6587\u66f8\u3092\u6697\u53f7\u5316\u3059\u308b\u884c\u70ba\u3067\u3042\u308a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5b88\u308b\u91cd\u8981\u306a\u5f79\u5272\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p><strong>\uff1c\u516c\u958b\u9375\u6697\u53f7\u65b9\u5f0f\u306e\u6587\u66f8\u9001\u4ed8\u306e\u6d41\u308c\uff08RSA\u6697\u53f7\u5316\u65b9\u5f0f\u4f7f\u7528\uff09\uff1e<\/strong><\/p>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>\u9001\u4fe1\u8005\u306f\u3001\u96fb\u5b50\u53d6\u5f15\u958b\u59cb\u524d\u306b\u8a8d\u8a3c\u5c40\u306b\u5bfe\u3057\u3066<a href=\"https:\/\/shinsei.e-gov.go.jp\/contents\/preparation\/certificate\/certification-authority.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u96fb\u5b50\u8a3c\u660e\u66f8\u306e\u5229\u7528\u7533\u3057\u8fbc\u307f<\/a>\u3092\u884c\u3044\u3001\u8a8d\u8a3c\u5c40\u304b\u3089\u96fb\u5b50\u8a3c\u660e\u66f8\u3092\u53d7\u7406\u3059\u308b\u3002\u96fb\u5b50\u8a3c\u660e\u66f8\u306e\u53d7\u7406\u306b\u3088\u308a\u3001\u79d8\u5bc6\u9375\u3068\u516c\u958b\u9375\u306e\u4e00\u5bfe\u4e00\u306e\u5bfe\u5fdc\u4ed8\u3051\u304c\u884c\u306a\u308f\u308c\u3001\u516c\u958b\u9375\u306e\u6b63\u5f53\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u3002<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\" start=\"2\">\r\n<li>\u9001\u4fe1\u8005\u306f\u96fb\u5b50\u6587\u66f8\u3092\u9001\u4ed8\u3059\u308b\u969b\u3001\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306b\u3088\u308a\u30c7\u30fc\u30bf\u3092\u30cf\u30c3\u30b7\u30e5\u5024\u306b\u5909\u63db\u3057\u305f\u306e\u3061\u3001\u79d8\u5bc6\u9375\u306b\u3088\u308a\u96fb\u5b50\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\uff08\u96fb\u5b50\u66f8\u540d\uff09\u3002<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\" start=\"3\">\r\n<li>\u6697\u53f7\u5316\u3055\u308c\u305f\u96fb\u5b50\u30c7\u30fc\u30bf\u3092\u516c\u958b\u9375\uff08\u96fb\u5b50\u8a3c\u660e\u66f8\uff09\u3068\u3068\u3082\u306b\u76f8\u624b\u306b\u9001\u4ed8\u3059\u308b\u3002<\/li>\r\n<li>\u53d7\u4fe1\u8005\u306f\u53d7\u4fe1\u3057\u305f\u66f8\u985e\u3092\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3092\u7528\u3044\u3066\u5fa9\u5143\u3059\u308b\u3068\u3068\u3082\u306b\u3001\u96fb\u5b50\u7f72\u540d\u3092\u3001\u9001\u4fe1\u6642\u306e\u6697\u53f7\u5316\u306b\u4f7f\u7528\u3057\u305f\u79d8\u5bc6\u9375\u306b\u5bfe\u5fdc\u3057\u305f\u516c\u958b\u9375\uff08\u96fb\u5b50\u8a3c\u660e\u66f8\uff09\u3067\u5fa9\u5143\u3059\u308b\u3002\u3053\u306e\u6642\u306b\u30c7\u30fc\u30bf\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3001\u307e\u305f\u9001\u4fe1\u8005\u672c\u4eba\u304b\u3089\u306e\u30c7\u30fc\u30bf\u3067\u3042\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u305f\u5834\u5408\u306e\u307f\u3001\u5fa9\u5143\u304c\u53ef\u80fd\u3068\u306a\u308b\u3002<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p>\u30cf\u30c3\u30b7\u30e5\u5024\u3068\u306f\uff1a\u4e0e\u3048\u3089\u308c\u305f\u539f\u6587\u304b\u3089\u3001\u5fc5\u305a\u6c7a\u3081\u3089\u308c\u305f\u9577\u3055\uff08160\u30fb256\u30d3\u30c3\u30c8\u306a\u3069\uff09\u306e\u5236\u9650\u3092\u8a2d\u3051\u305f\u4e71\u6570\u3092\u751f\u6210\u3059\u308b\u6f14\u7b97\u624b\u6cd5\u3067\u6c42\u3081\u3089\u308c\u308b\u5024\u306e\u3053\u3068\u3067\u3059\u3002\u96fb\u5b50\u7f72\u540d\u306e\u969b\u3001\u81ea\u52d5\u3067\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"900\" height=\"500\" class=\"wp-image-2830\" src=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u7dcf\u52d9\u7701\u96fb\u5b50\u7f72\u540d\u306e\u4ed5\u7d44\u307f.jpg\" alt=\"\u7dcf\u52d9\u7701\u96fb\u5b50\u7f72\u540d\u306e\u4ed5\u7d44\u307f\" srcset=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u7dcf\u52d9\u7701\u96fb\u5b50\u7f72\u540d\u306e\u4ed5\u7d44\u307f.jpg 900w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u7dcf\u52d9\u7701\u96fb\u5b50\u7f72\u540d\u306e\u4ed5\u7d44\u307f-300x167.jpg 300w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u7dcf\u52d9\u7701\u96fb\u5b50\u7f72\u540d\u306e\u4ed5\u7d44\u307f-768x427.jpg 768w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u7dcf\u52d9\u7701\u96fb\u5b50\u7f72\u540d\u306e\u4ed5\u7d44\u307f-480x267.jpg 480w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure>\r\n\r\n\r\n\r\n<p>\u53c2\u8003\uff1a<a href=\"https:\/\/www.soumu.go.jp\/main_sosiki\/joho_tsusin\/top\/ninshou-law\/pdf\/090611_1.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">\u7dcf\u52d9\u7701HP\u3000\u96fb\u5b50\u7f72\u540d\u30fb\u8a8d\u8a3c\u30fb\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3000\u305d\u306e\u5f79\u5272\u3068\u6d3b\u7528<\/a><\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">\u96fb\u5b50\u7f72\u540d\u3068\u6697\u53f7\u5316\u6280\u8853<\/h3>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u306b\u306f<a href=\"https:\/\/esac.jipdec.or.jp\/why-e-signature\/public-key-infrastructure.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u516c\u958b\u9375\u6697\u53f7\u57fa\u76e4<\/a>\uff08PKI\uff09\u3068\u547c\u3070\u308c\u308b\u300c\u6697\u53f7\u5316\u300d\u306e\u6280\u8853\u304c\u7528\u3044\u3089\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\u5177\u4f53\u7684\u306b\u306f\u3001\u516c\u958b\u9375\u6697\u53f7\u3067\u7528\u3044\u308b\u79d8\u5bc6\u9375\u3068\u516c\u958b\u9375\u306e\u7d44\u307f\u5408\u308f\u305b\u3068\u3001\u305d\u306e\u9375\u30da\u30a2\u306e\u6240\u6709\u8005\u306e\u95a2\u4fc2\u3092\u4fdd\u8a3c\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\uff08\u57fa\u76e4\uff09\u3067\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>\u5229\u7528\u8005\u306f\u3001\u96fb\u5b50\u53d6\u5f15\u306e\u958b\u59cb\u524d\u306b\u8a8d\u8a3c\u5c40\u306b\u5bfe\u3057\u3066<a href=\"https:\/\/shinsei.e-gov.go.jp\/contents\/preparation\/certificate\/certification-authority.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u96fb\u5b50\u8a3c\u660e\u66f8\u306e\u5229\u7528\u7533\u3057\u8fbc\u307f<\/a>\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u96fb\u5b50\u7f72\u540d\u3068\u96fb\u5b50\u8a3c\u660e\u66f8\u306b\u3088\u308b\u4ed5\u7d44\u307f\u304c\u6709\u52b9\u5316\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u6cd5\u7684\u52b9\u529b\u304c\u78ba\u4fdd\u3055\u308c\u305f\u96fb\u5b50\u53d6\u5f15\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E9%9B%BB%E5%AD%90%E7%BD%B2%E5%90%8D%E3%82%92%E5%AE%89%E5%BF%83%E3%81%97%E3%81%A6%E5%88%A9%E7%94%A8%E3%81%99%E3%82%8B%E3%81%9F%E3%82%81%E3%81%AB\"><\/span>\u96fb\u5b50\u7f72\u540d\u3092\u5b89\u5fc3\u3057\u3066\u5229\u7528\u3059\u308b\u305f\u3081\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u306e\u5229\u7528\u6642\u306f\u3001\u5229\u7528\u8005\u5074\u3082\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u9762\u3084\u96fb\u5b50\u8a3c\u660e\u66f8\u306e\u671f\u9650\u5207\u308c\u306b\u5341\u5206\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u5229\u7528\u8005\u304c\u7279\u306b\u6ce8\u610f\u3059\u3079\u304d\u70b9\u3092\u4ee5\u4e0b\u306b\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\r\n<h5>\u96fb\u5b50\u8a3c\u660e\u66f8\u306e\u7533\u8acb\u6642\u306b\u96fb\u5b50\u7f72\u540d\u306e\u5229\u7528\u7bc4\u56f2\u3092\u78ba\u8a8d<\/h5>\r\n<\/li>\r\n<li>\r\n<h5>\u96fb\u5b50\u7f72\u540d\u3092\u884c\u3046\u524d\u306b\u96fb\u5b50\u6587\u66f8\u306e\u5185\u5bb9\u306b\u8aa4\u308a\u304c\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d<\/h5>\r\n<\/li>\r\n<li>\r\n<h5>\u96fb\u5b50\u7f72\u540d\u3092\u884c\u3046\u305f\u3081\u306e\u79d8\u5bc6\u9375\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/h5>\r\n<\/li>\r\n<li>\r\n<h5>\u9001\u4fe1\u8005\u306e\u96fb\u5b50\u7f72\u540d\u6642\u306b\u96fb\u5b50\u8a3c\u660e\u66f8\u304c\u5931\u52b9\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d<\/h5>\r\n<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>\u4e07\u304c\u4e00\u3001\u79d8\u5bc6\u9375\u304c\u76d7\u307e\u308c\u3066\u3057\u307e\u3046\u3068\u3001\u6587\u66f8\u306e\u76d7\u7528\u3084\u6539\u3056\u3093\u306e\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002<br \/>\u305d\u306e\u305f\u3081\u3001\u5229\u7528\u8005\u81ea\u8eab\u3067\u3082\u6587\u66f8\u306e\u5909\u66f4\u5c65\u6b74\u3092\u968f\u6642\u30c1\u30a7\u30c3\u30af\u3067\u304d\u308b\u30b7\u30b9\u30c6\u30e0\u3084\u3001\u96fb\u5b50\u7f72\u540d\u3057\u305f\u7b87\u6240\u304c\u4fdd\u8b77\u3067\u304d\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>\u307e\u305f\u96fb\u5b50\u8a3c\u660e\u66f8\u304c\u7121\u52b9\u306e\u5834\u5408\u3001\u96fb\u5b50\u6587\u66f8\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3084\u6cd5\u7684\u52b9\u529b\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u305b\u3093\u3002<br \/>\u8a8d\u8a3c\u5c40\uff08CA\uff09\u304b\u3089\u5b9a\u671f\u7684\u306b\u914d\u5e03\u3055\u308c\u308b\u5931\u52b9\u30ea\u30b9\u30c8\uff08CRL\uff09\u306b\u3088\u308a\u3001\u9001\u4fe1\u8005\u306e\u7f72\u540d\u6642\u523b\u3092\u898b\u3066\u3001\u516c\u958b\u9375\u306e\u96fb\u5b50\u8a3c\u660e\u66f8\u756a\u53f7\u304c\u305d\u306e\u6642\u70b9\u3067CRL\u30ea\u30b9\u30c8\u306b\u63b2\u8f09\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3069\u3046\u304b\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"900\" height=\"500\" class=\"wp-image-2831\" src=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u8a3c\u660e\u66f8.jpg\" alt=\"\u96fb\u5b50\u8a3c\u660e\u66f8\" srcset=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u8a3c\u660e\u66f8.jpg 900w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u8a3c\u660e\u66f8-300x167.jpg 300w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u8a3c\u660e\u66f8-768x427.jpg 768w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/03\/\u96fb\u5b50\u8a3c\u660e\u66f8-480x267.jpg 480w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/figure>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%81%BE%E3%81%A8%E3%82%81\"><\/span>\u307e\u3068\u3081<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>\u4eca\u56de\u306f\u96fb\u5b50\u7f72\u540d\u3068\u306f\u4f55\u304b\u3001\u96fb\u5b50\u7f72\u540d\u306e\u4ed5\u7d44\u307f\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u96fb\u5b50\u7f72\u540d\u306e\u6ce8\u610f\u70b9\u306a\u3069\u306b\u3064\u3044\u3066\u8a18\u8f09\u3057\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\u96fb\u5b50\u7f72\u540d\u3068\u306f<\/h4>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u6587\u66f8\u306b\u8a18\u9332\u3055\u308c\u305f\u60c5\u5831\u3092\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u8105\u5a01\uff08\u306a\u308a\u3059\u307e\u3057\u30fb\u5185\u5bb9\u306e\u6539\u3056\u3093\u30fb\u76d7\u8074\u306a\u3069\uff09\u304b\u3089\u5b88\u308a\u3001\u307e\u305f\u96fb\u5b50\u6587\u66f8\u306b\u6cd5\u7684\u52b9\u529b\u3092\u6301\u305f\u305b\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u3082\u306e\u3002<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\u96fb\u5b50\u7f72\u540d\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/h4>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u3068\u306f\u3001\u96fb\u5b50\u6587\u66f8\u306e\u3084\u308a\u53d6\u308a\u3067\u4f7f\u308f\u308c\u308b\u300c\u516c\u958b\u9375\u6697\u53f7\u65b9\u5f0f\u300d\u306e\u4e2d\u3067\u3001\u79d8\u5bc6\u9375\u306b\u3088\u308a\u96fb\u5b50\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3057\u305f\u8a3c\u660e\u3002<\/p>\r\n\r\n\r\n\r\n<p>\u96fb\u5b50\u7f72\u540d\u306e\u5229\u7528\u306b\u306f\u8a8d\u8a3c\u5c40\uff08CA\uff09\u3067\u96fb\u5b50\u8a3c\u660e\u66f8\u306e\u7533\u8acb\u304c\u5fc5\u8981\u3068\u306a\u308a\u3001\u96fb\u5b50\u7f72\u540d\u3068\u96fb\u5b50\u8a3c\u660e\u66f8\u3092\u6709\u52b9\u5316\u3059\u308b\u3053\u3068\u3067\u3067\u96fb\u5b50\u6587\u66f8\u306e\u6cd5\u7684\u52b9\u529b\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5b88\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\u96fb\u5b50\u7f72\u540d\u5229\u7528\u6642\u306e\u6ce8\u610f\u70b9\uff08\u2460\u301c\u2462\u306f\u9001\u4fe1\u8005\u3001\u2463\u306f\u9001\u4fe1\u8005\u3068\u53d7\u4fe1\u8005\uff09<\/h4>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li>\u96fb\u5b50\u7f72\u540d\u306e\u5229\u7528\u7bc4\u56f2\u306e\u78ba\u8a8d<\/li>\r\n<li>\u96fb\u5b50\u7f72\u540d\u306e\u524d\u306b\u96fb\u5b50\u6587\u66f8\u306e\u5185\u5bb9\u3092\u78ba\u8a8d<\/li>\r\n<li>\u96fb\u5b50\u7f72\u540d\u306b\u5fc5\u8981\u306a\u79d8\u5bc6\u9375\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/li>\r\n<li>\u96fb\u5b50\u7f72\u540d\u6642\u306e\u96fb\u5b50\u8a3c\u660e\u66f8\u306e\u6709\u52b9\u6027\u3092\u78ba\u8a8d<\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p>\u4eca\u3084\u307b\u3068\u3093\u3069\u306e\u30d3\u30b8\u30cd\u30b9\u306b\u6b20\u304b\u305b\u306a\u3044\u96fb\u5b50\u7f72\u540d\u3002\u305d\u306e\u30cb\u30fc\u30ba\u306f\u4eca\u5f8c\u3082\u307e\u3059\u307e\u3059\u5897\u3048\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002<br \/>\u305d\u3053\u3067\u6700\u5f8c\u306b\u3001\u4e07\u5168\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u4f7f\u3044\u52dd\u624b\u306e\u826f\u3055\u3067\u4e16\u754c\u4e2d\u304b\u3089\u9078\u3070\u308c\u3066\u3044\u308b\u3001Kdan\u793e\u306e\u00a0<a href=\"https:\/\/www.dottedsign.com\/ja\/product-tour\">DottedSign<\/a>\u00a0\u3092\u3054\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>Kdan\u304c\u63d0\u4f9b\u3059\u308bDottedSign\u3067\u306f\u5168\u3066\u306e\u96fb\u5b50\u7f72\u540d\u306e\u5951\u7d04\u30d7\u30ed\u30bb\u30b9\u3092\u8a18\u9332\u3057\u3001\u6697\u53f7\u5316\u901a\u4fe1\u3092\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u5229\u7528\u8005\u304c\u5b89\u5fc3\u3057\u3066\u5229\u7528\u3067\u304d\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a4\u4f53\u5236\u304c\u6574\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<p>DottedSign \u306e\u30c8\u30e9\u30c3\u30ad\u30f3\u30b0\uff08\u76e3\u67fb\u8a3c\u8de1\uff09\u6a5f\u80fd\u306f\u3001\u53d7\u4fe1\u8005\u304b\u3089\u7f72\u540d\u3092\u3057\u305f\u4eba\u307e\u3067\u3001\u3044\u3064\u8ab0\u304c\u30aa\u30f3\u30e9\u30a4\u30f3\u4e0a\u3067\u4f55\u3092\u3057\u305f\u304b\u8a73\u7d30\u306b\u8a18\u9332\u3055\u308c\u307e\u3059\u3002<br \/>\u307e\u305f\u30b5\u30a4\u30f3\u3057\u305f\u7b87\u6240\u306f\u4e0d\u6b63\u958b\u5c01\u9632\u6b62\u6a5f\u80fd\u306b\u3088\u3063\u3066\u4fdd\u8b77\u3055\u308c\u3001\u30b5\u30a4\u30f3\u5f8c\u306e\u5951\u7d04\u66f8\u306b\u5909\u66f4\u304c\u52a0\u3048\u3089\u308c\u308b\u3068\u3001\u77ac\u6642\u306b\u30a2\u30e9\u30fc\u30c8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"553\" class=\"wp-image-2586\" src=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-1024x553.jpg\" alt=\"\u96fb\u5b50\u7f72\u540d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 - \u76e3\u67fb\u8a3c\u8de1\" srcset=\"https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-1024x553.jpg 1024w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-300x162.jpg 300w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-768x414.jpg 768w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-1080x583.jpg 1080w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-1280x691.jpg 1280w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-980x529.jpg 980w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1-480x259.jpg 480w, https:\/\/www.dottedsign.com\/ja\/blog\/wp-content\/uploads\/2021\/01\/after-sign-security-1.jpg 1312w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" 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