{"id":15750,"date":"2026-02-04T19:26:45","date_gmt":"2026-02-04T16:26:45","guid":{"rendered":"https:\/\/smspva.com\/blog\/are-special-characters-really-required-in-passwords-ja\/"},"modified":"2026-02-04T19:26:45","modified_gmt":"2026-02-04T16:26:45","slug":"are-special-characters-really-required-in-passwords-ja","status":"publish","type":"post","link":"https:\/\/smspva.com\/blog\/ja\/are-special-characters-really-required-in-passwords-ja\/","title":{"rendered":"\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u304c\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b"},"content":{"rendered":"\n<style>:root { --bg: #fff; --text: #111; } .container { max-width: 860px; margin: 0 auto; padding: 20px; font-family: Arial, sans-serif; color: var(--text); background: #fff; } .kicker { font-size: 12px; text-transform: uppercase; color: #6b7280; margin-bottom: 6px; } .badge { background: #eef2ff; color: #374151; padding: 4px 8px; border-radius: 999px; margin-right: 6px; font-weight: 600; } h1 { font-size: 28px; margin: 6px 0 14px; } .tl-dr { background: #f8fafc; border-left: 4px solid #1e3a8a; padding: 12px 14px; margin: 14px 0; } .section { margin: 28px 0; } .table { width: 100%; border-collapse: collapse; } .table th, .table td { border: 1px solid #e5e7eb; padding: 8px; text-align: left; } .btn { display: inline-block; padding: 12px 18px; border-radius: 6px; text-decoration: none; color: #fff; margin: 6px 6px 0 0; } .btn-primary { background: #2563eb; } .btn-secondary { background: #64748b; } @media (max-width: 700px) { .container { padding: 12px; } h1 { font-size: 24px; } }<\/style><article class='container' itemscope itemtype='https:\/\/schema.org\/TechArticle'><header><img src='\/storage\/articles\/are-special-characters-really-required-in-passwords.png' alt='\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u306f\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b - \u30d1\u30b9\u30ef\u30fc\u30c9\u5f37\u5ea6\u30a4\u30e9\u30b9\u30c8'><div class='kicker' aria-label='kicker'><span class='badge'>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/span><span class='badge'>\u30d1\u30b9\u30ef\u30fc\u30c9<\/span><span class='badge'>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/span><\/div><h1>\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u304c\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b<\/h1><\/header><section class='tl-dr' aria-label='TL;DR'><strong>TL;DR:<\/strong> \u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u306f\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b\uff1f\u5fc5\u9808\u3067\u306f\u306a\u3044\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u8a18\u53f7\u306f\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u9ad8\u3081\u307e\u3059\u3002\u9577\u3055\u3068\u72ec\u81ea\u6027\u3001\u305d\u3057\u30662FA\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u5f37\u529b\u306a\u4fdd\u8b77\u3092\u5f97\u3089\u308c\u307e\u3059\u3002<\/section><section class='section' id='why-use'><h2>\u5f37\u529b\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f7f\u3046\u7406\u7531<\/h2><p>\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u304c\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b\uff1f\u6838\u2f3c\u3068\u306a\u308b\u8003\u3048\u65b9\u306f\u3001\u9577\u304f\u4e88\u6e2c\u4e0d\u80fd\u306a\u7d44\u307f\u5408\u308f\u305b\u3092\u4f5c\u308b\u3053\u3068\u3067\u3059\u3002\u30b5\u30a4\u30c8\u3054\u3068\u306b\u518d\u5229\u7528\u3057\u306a\u3044\u9577\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3084\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u306f\u3001\u77ed\u304f\u8907\u96d1\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3088\u308a\u3082\u5f37\u529b\u306a\u4fdd\u8b77\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u57fa\u672c\u306b\u3064\u3044\u3066\u306f <a href='https:\/\/en.wikipedia.org\/wiki\/Password' target='_blank' rel=\"nofollow noopener\">Wikipedia<\/a> \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u8a18\u4e8b\u3092\u53c2\u7167\u3057\u3001<a href='https:\/\/security.googleblog.com' target='_blank' rel=\"nofollow noopener\">Google Security<\/a> \u306e\u63a8\u5968\u4e8b\u9805\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/section><section class='section' id='how-to'><h2>\u5f37\u529b\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5<\/h2><ol><li>\u57fa\u6e96\u3068\u3057\u306612\u201316\u6587\u5b57\u3092\u76ee\u6307\u3059\u3002<\/li><li>\u5229\u7528\u53ef\u80fd\u306a\u5834\u5408\u306f\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u30fb\u6570\u5b57\u30fb\u8a18\u53f7\u306e\u6df7\u5728\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li><li>\u8f9e\u66f8\u8a9e\u306b\u306f\u983c\u3089\u305a\u3001\u95a2\u9023\u6027\u306e\u306a\u3044\u5358\u8a9e\u304b\u3089\u6210\u308b\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3092\u691c\u8a0e\u3059\u308b\u3002<\/li><li>\u30b5\u30a4\u30c8\u9593\u3067\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u518d\u5229\u7528\u3057\u306a\u3044\u3002<\/li><li>\u4fe1\u983c\u3067\u304d\u308b\u30d1\u30b9\u30ef\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3092\u4f7f\u3063\u3066\u3001\u8907\u96d1\u306a\u8a8d\u8a3c\u60c5\u5831\u3092\u751f\u6210\u30fb\u4fdd\u5b58\u3059\u308b\u3002<\/li><li>\u53ef\u80fd\u306a\u9650\u308a\u4e8c\u8981\u7d20\u8a8d\u8a3c\uff082FA\uff09\u3092\u6709\u52b9\u5316\u3057\u3066\u8ffd\u52a0\u306e\u4fdd\u8b77\u3092\u5f97\u308b\u3002<\/li><li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3092\u5b9a\u671f\u7684\u306b\u898b\u76f4\u3057\u3001\u4fb5\u5bb3\u3055\u308c\u305f\u30a2\u30ab\u30a6\u30f3\u30c8\u306f\u901f\u3084\u304b\u306b\u66f4\u65b0\u3059\u308b\u3002<\/li><\/ol><\/section><section class='section' id='comparison'><h2>\u30af\u30a4\u30c3\u30af\u6bd4\u8f03: \u30d1\u30b9\u30ef\u30fc\u30c9 vs \u30d1\u30b9\u30d5\u30ec\u30fc\u30ba<\/h2><table class='table' aria-label='\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30ac\u30a4\u30c0\u30f3\u30b9\u8868'><thead><tr><th>\u30a2\u30d7\u30ed\u30fc\u30c1<\/th><th>\u9577\u3055<\/th><th>\u8907\u96d1\u3055<\/th><th>\u5229\u70b9<\/th><th>\u6b20\u70b9<\/th><\/tr><\/thead><tbody><tr><td>\u5f93\u6765\u306e\u30d1\u30b9\u30ef\u30fc\u30c9<\/td><td>8\u201312<\/td><td>\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u30fb\u6570\u5b57\u30fb\u8a18\u53f7<\/td><td>\u9577\u3055\u304c\u5341\u5206\u3067\u3042\u308c\u3070\u6709\u5229<\/td><td>\u899a\u3048\u306b\u304f\u3044\u3001\u518d\u5229\u7528\u306e\u30ea\u30b9\u30af<\/td><\/tr><tr><td>\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba<\/td><td>15\u201330+<\/td><td>\u5358\u8a9e\uff0b\u533a\u5207\u308a\u6587\u5b57<\/td><td>\u899a\u3048\u3084\u3059\u304f\u3001\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u9ad8\u3044<\/td><td>\u5165\u529b\u304c\u9577\u304f\u306a\u308b\u53ef\u80fd\u6027<\/td><\/tr><\/tbody><\/table><\/section><section class='section' id='safe-use'><h2>\u5b89\u5168\u3067\u9069\u6cd5\u306a\u4f7f\u7528<\/h2><p>\u5e38\u306b\u502b\u7406\u7684\u304b\u3064\u6cd5\u7684\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u81ea\u5206\u304c\u6240\u6709\u3057\u3066\u3044\u306a\u3044\u30a2\u30ab\u30a6\u30f3\u30c8\u3078\u30a2\u30af\u30bb\u30b9\u3092\u8a66\u307f\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u95a2\u3059\u308b\u53c2\u8003\u60c5\u5831\u3068\u3057\u3066\u3001<a href='https:\/\/en.wikipedia.org\/wiki\/Password' target='_blank' rel=\"nofollow noopener\">Wikipedia: Password<\/a> \u304a\u3088\u3073 <a href='https:\/\/security.googleblog.com' target='_blank' rel=\"nofollow noopener\">Google Security Blog<\/a> \u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\u751f\u6210\u3084\u4fdd\u5b58\u306b\u306f\u3001\u4fe1\u983c\u3067\u304d\u308b\u30b5\u30fc\u30d3\u30b9\u3068\u3057\u3066 <a href='https:\/\/smspva.com\/generate-password.html' target='_blank' rel=\"nofollow noopener\">SMSPVA \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u751f\u6210\u30c4\u30fc\u30eb<\/a> \u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/section><section class='section' id='faq'><h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2><div class='qa'><details><summary>\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u8a18\u53f7\u306f\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b\uff1f<\/summary><p>\u5fc5\u9808\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u8a18\u53f7\u3092\u8ffd\u52a0\u3059\u308b\u3068\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002\u9577\u304f\u3066\u72ec\u81ea\u306e\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3092\u4f7f\u7528\u3059\u308c\u3070\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u8a18\u53f7\u306a\u3057\u3067\u3082\u5f37\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f97\u3089\u308c\u307e\u3059\u3002<\/p><\/details><details><summary>\u8a18\u53f7\u304c\u8a31\u53ef\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u5e38\u306b\u8a18\u53f7\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f<\/summary><p>\u8a18\u53f7\u306f\u8a31\u5bb9\u3055\u308c\u308b\u74b0\u5883\u3067\u306f\u5f79\u7acb\u3061\u307e\u3059\u304c\u3001\u899a\u3048\u308b\u306e\u304c\u96e3\u3057\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u9577\u3055\u30682FA\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u899a\u3048\u3084\u3059\u3055\u3092\u512a\u5148\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/details><details><summary>\u30d1\u30b9\u30ef\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306f\u5b89\u5168\u3067\u3059\u304b\uff1f<\/summary><p>\u306f\u3044\u3002\u5f37\u529b\u306a\u6697\u53f7\u5316\u3068\u30bc\u30ed\u77e5\u8b58\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u5099\u3048\u305f\u4fe1\u983c\u3067\u304d\u308b\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3092\u9078\u629e\u3059\u308c\u3070\u5b89\u5168\u3067\u3059\u3002\u518d\u5229\u7528\u30ea\u30b9\u30af\u3092\u6e1b\u3089\u3057\u3001\u72ec\u81ea\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u751f\u6210\u3059\u308b\u624b\u52a9\u3051\u306b\u306a\u308a\u307e\u3059\u3002<\/p><\/details><details><summary>\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u306f\u5b89\u5168\u3067\u3059\u304b\uff1f<\/summary><p>\u3082\u3061\u308d\u3093\u3067\u3059\u3002\u95a2\u9023\u6027\u306e\u306a\u3044\u5358\u8a9e\u304b\u3089\u6210\u308b\u9577\u304f\u30e9\u30f3\u30c0\u30e0\u306a\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u306f\u3001\u899a\u3048\u3084\u3059\u304f\u3001\u89e3\u8aad\u304c\u96e3\u3057\u3044\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p><\/details><details><summary>\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u5f37\u5ea6\u3092\u3069\u3046\u30c6\u30b9\u30c8\u3057\u307e\u3059\u304b\uff1f<\/summary><p>\u30d6\u30e9\u30a6\u30b6\u306e\u7d44\u307f\u8fbc\u307f\u306e\u5f37\u5ea6\u30e1\u30fc\u30bf\u30fc\u3068\u4fe1\u983c\u3067\u304d\u308b\u751f\u6210\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u91cd\u8996\u3057\u3001\u3088\u304f\u3042\u308b\u8a9e\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u907f\u3051\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/details><details><summary>\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u518d\u5229\u7528\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u304b\uff1f<\/summary><p>\u518d\u5229\u7528\u306f\u7d76\u5bfe\u306b\u907f\u3051\u3066\u304f\u3060\u3055\u3044\u3002\u5404\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u306f\u4e00\u610f\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u3001\u7406\u60f3\u7684\u306b\u306f\u30d1\u30b9\u30ef\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p><\/details><\/div><\/section><section class='section' id='cta'><h2>\u884c\u52d5\u3092\u8d77\u3053\u3059<\/h2><a class='btn btn-primary' href='https:\/\/smspva.com\/generate-password.html' rel=\"nofollow noopener\" target='_blank'>\u4eca\u3059\u3050\u5f37\u529b\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u751f\u6210\u3059\u308b<\/a><a class='btn btn-secondary' href='https:\/\/smspva.com\/blog\/best-practices-passwords\/' rel=\"nofollow noopener\" target='_blank'>\u30d1\u30b9\u30ef\u30fc\u30c9\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u3082\u3063\u3068\u5b66\u3076<\/a><\/section><\/article>\n","protected":false},"excerpt":{"rendered":"<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d1\u30b9\u30ef\u30fc\u30c9\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9 \u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u304c\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b TL;DR: \u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u306f\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b\uff1f\u5fc5\u9808\u3067\u306f\u306a\u3044\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u8a18\u53f7\u306f\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u9ad8\u3081\u307e\u3059\u3002\u9577\u3055\u3068\u72ec\u81ea\u6027\u3001\u305d\u3057\u30662FA\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u5f37\u529b\u306a\u4fdd\u8b77\u3092\u5f97\u3089\u308c\u307e\u3059\u3002 \u5f37\u529b\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f7f\u3046\u7406\u7531 \u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u7279\u6b8a\u6587\u5b57\u304c\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b\uff1f\u6838\u2f3c\u3068\u306a\u308b\u8003\u3048\u65b9\u306f\u3001\u9577\u304f\u4e88\u6e2c\u4e0d\u80fd\u306a\u7d44\u307f\u5408\u308f\u305b\u3092\u4f5c\u308b\u3053\u3068\u3067\u3059\u3002\u30b5\u30a4\u30c8\u3054\u3068\u306b\u518d\u5229\u7528\u3057\u306a\u3044\u9577\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3084\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u306f\u3001\u77ed\u304f\u8907\u96d1\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3088\u308a\u3082\u5f37\u529b\u306a\u4fdd\u8b77\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u57fa\u672c\u306b\u3064\u3044\u3066\u306f Wikipedia \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u8a18\u4e8b\u3092\u53c2\u7167\u3057\u3001Google Security \u306e\u63a8\u5968\u4e8b\u9805\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u5f37\u529b\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5 \u57fa\u6e96\u3068\u3057\u306612\u201316\u6587\u5b57\u3092\u76ee\u6307\u3059\u3002 \u5229\u7528\u53ef\u80fd\u306a\u5834\u5408\u306f\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u30fb\u6570\u5b57\u30fb\u8a18\u53f7\u306e\u6df7\u5728\u3092\u4f7f\u7528\u3059\u308b\u3002 \u8f9e\u66f8\u8a9e\u306b\u306f\u983c\u3089\u305a\u3001\u95a2\u9023\u6027\u306e\u306a\u3044\u5358\u8a9e\u304b\u3089\u6210\u308b\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3092\u691c\u8a0e\u3059\u308b\u3002 \u30b5\u30a4\u30c8\u9593\u3067\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u518d\u5229\u7528\u3057\u306a\u3044\u3002 \u4fe1\u983c\u3067\u304d\u308b\u30d1\u30b9\u30ef\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3092\u4f7f\u3063\u3066\u3001\u8907\u96d1\u306a\u8a8d\u8a3c\u60c5\u5831\u3092\u751f\u6210\u30fb\u4fdd\u5b58\u3059\u308b\u3002 \u53ef\u80fd\u306a\u9650\u308a\u4e8c\u8981\u7d20\u8a8d\u8a3c\uff082FA\uff09\u3092\u6709\u52b9\u5316\u3057\u3066\u8ffd\u52a0\u306e\u4fdd\u8b77\u3092\u5f97\u308b\u3002 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3092\u5b9a\u671f\u7684\u306b\u898b\u76f4\u3057\u3001\u4fb5\u5bb3\u3055\u308c\u305f\u30a2\u30ab\u30a6\u30f3\u30c8\u306f\u901f\u3084\u304b\u306b\u66f4\u65b0\u3059\u308b\u3002 \u30af\u30a4\u30c3\u30af\u6bd4\u8f03: \u30d1\u30b9\u30ef\u30fc\u30c9 vs \u30d1\u30b9\u30d5\u30ec\u30fc\u30ba \u30a2\u30d7\u30ed\u30fc\u30c1 \u9577\u3055 \u8907\u96d1\u3055 \u5229\u70b9 \u6b20\u70b9 \u5f93\u6765\u306e\u30d1\u30b9\u30ef\u30fc\u30c9 8\u201312 \u5927\u6587\u5b57\u5c0f\u6587\u5b57\u30fb\u6570\u5b57\u30fb\u8a18\u53f7 \u9577\u3055\u304c\u5341\u5206\u3067\u3042\u308c\u3070\u6709\u5229 \u899a\u3048\u306b\u304f\u3044\u3001\u518d\u5229\u7528\u306e\u30ea\u30b9\u30af \u30d1\u30b9\u30d5\u30ec\u30fc\u30ba 15\u201330+ \u5358\u8a9e\uff0b\u533a\u5207\u308a\u6587\u5b57 \u899a\u3048\u3084\u3059\u304f\u3001\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u9ad8\u3044 \u5165\u529b\u304c\u9577\u304f\u306a\u308b\u53ef\u80fd\u6027 \u5b89\u5168\u3067\u9069\u6cd5\u306a\u4f7f\u7528 \u5e38\u306b\u502b\u7406\u7684\u304b\u3064\u6cd5\u7684\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u81ea\u5206\u304c\u6240\u6709\u3057\u3066\u3044\u306a\u3044\u30a2\u30ab\u30a6\u30f3\u30c8\u3078\u30a2\u30af\u30bb\u30b9\u3092\u8a66\u307f\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u95a2\u3059\u308b\u53c2\u8003\u60c5\u5831\u3068\u3057\u3066\u3001Wikipedia: Password \u304a\u3088\u3073 Google Security Blog \u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\u751f\u6210\u3084\u4fdd\u5b58\u306b\u306f\u3001\u4fe1\u983c\u3067\u304d\u308b\u30b5\u30fc\u30d3\u30b9\u3068\u3057\u3066 SMSPVA \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u751f\u6210\u30c4\u30fc\u30eb \u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u3088\u304f\u3042\u308b\u8cea\u554f \u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u306f\u8a18\u53f7\u306f\u672c\u5f53\u306b\u5fc5\u8981\u3067\u3059\u304b\uff1f \u5fc5\u9808\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u8a18\u53f7\u3092\u8ffd\u52a0\u3059\u308b\u3068\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u4e0a\u304c\u308a\u307e\u3059\u3002\u9577\u304f\u3066\u72ec\u81ea\u306e\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3092\u4f7f\u7528\u3059\u308c\u3070\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u8a18\u53f7\u306a\u3057\u3067\u3082\u5f37\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5f97\u3089\u308c\u307e\u3059\u3002 \u8a18\u53f7\u304c\u8a31\u53ef\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u5e38\u306b\u8a18\u53f7\u3092\u4f7f\u3046\u3079\u304d\u3067\u3059\u304b\uff1f 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\u306f\u3044\u3002\u5f37\u529b\u306a\u6697\u53f7\u5316\u3068\u30bc\u30ed\u77e5\u8b58\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u5099\u3048\u305f\u4fe1\u983c\u3067\u304d\u308b\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3092\u9078\u629e\u3059\u308c\u3070\u5b89\u5168\u3067\u3059\u3002\u518d\u5229\u7528\u30ea\u30b9\u30af\u3092\u6e1b\u3089\u3057\u3001\u72ec\u81ea\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u751f\u6210\u3059\u308b\u624b\u52a9\u3051\u306b\u306a\u308a\u307e\u3059\u3002&#8230;<\/p>\n","protected":false},"author":5,"featured_media":15738,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[252],"tags":[],"lang":"ja","translations":{"ja":15750,"en":15737,"es":15740,"zh":15741,"ar":15743,"fr":15744,"de":15745,"tr":15746,"it":15747,"pl":15748,"vi":15749,"pt":15751},"featured":{"id":15738,"url":"https:\/\/smspva.com\/blog\/wp-content\/uploads\/2026\/02\/are-special-characters-really-required-in-passwords.png","alt":"Are 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