{"id":15021,"date":"2026-01-23T03:21:50","date_gmt":"2026-01-23T00:21:50","guid":{"rendered":"https:\/\/smspva.com\/blog\/pasuwado-entoropi-kantan-setsumei-ja\/"},"modified":"2026-01-23T03:21:50","modified_gmt":"2026-01-23T00:21:50","slug":"pasuwado-entoropi-kantan-setsumei-ja","status":"publish","type":"post","link":"https:\/\/smspva.com\/blog\/ja\/pasuwado-entoropi-kantan-setsumei-ja\/","title":{"rendered":"\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u7c21\u5358\u306a\u8a00\u8449\u3067\u89e3\u8aac"},"content":{"rendered":"\n<style>* { box-sizing: border-box; } body { font-family: Arial, sans-serif; color: #333; background: #fff; line-height: 1.6; } .container { max-width: 1000px; margin: 0 auto; padding: 20px; } .kicker { font-size: 0.9em; color: #555; margin-bottom: 8px; } .badge { display: inline-block; padding: 4px 8px; border-radius: 12px; background: #f0f4f8; color: #333; margin-right: 6px; font-weight: 600; } h1 { font-size: 2rem; margin: 0.5em 0; } .section { margin-top: 40px; } table { width: 100%; border-collapse: collapse; margin: 10px 0; } table th, table td { border: 1px solid #ddd; padding: 8px; text-align: left; } ul { padding-left: 20px; } a { color: #1a0dab; text-decoration: underline; } @media (max-width: 768px) { .container { padding: 12px; } }<\/style><article class='container' itemscope itemtype='https:\/\/schema.org\/TechArticle'><header><img src='\/storage\/articles\/password-entropy-explained-terms.png' alt='\u5f37\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3068\u5f31\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u793a\u3059\u56f3'><div class='kicker'> <span class='badge'>US<\/span> <span class='badge'>\u30d1\u30b9\u30ef\u30fc\u30c9\u751f\u6210\u30c4\u30fc\u30eb<\/span> <span class='badge'>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc<\/span> <\/div><h1>\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u7c21\u5358\u306a\u8a00\u8449\u3067\u89e3\u8aac<\/h1><\/header><p>\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u8aac\u660e\u3059\u308b\u3053\u3068\u3067\u3001\u9577\u304f\u3066\u30e9\u30f3\u30c0\u30e0\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u306a\u305c\u89e3\u8aad\u3055\u308c\u306b\u304f\u3044\u306e\u304b\u3092\u7406\u89e3\u3067\u304d\u307e\u3059\u3002\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u3069\u3046\u6a5f\u80fd\u3059\u308b\u304b\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u65b9\u6cd5\u3092\u3001\u5e73\u6613\u306a\u8a00\u8449\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p><section id='tldr' class='section'><h2>\u8981\u7d04<\/h2><ul><li>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306f\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u4e88\u6e2c\u4e0d\u80fd\u6027\u3092\u6e2c\u308b\u6307\u6a19\u3067\u3059\u3002<\/li><li>\u9577\u3055\u304c\u9577\u304f\u3001\u30e9\u30f3\u30c0\u30e0\u6027\u304c\u9ad8\u3044\u6587\u5b57\u3092\u4f7f\u3046\u3068\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u5897\u3048\u307e\u3059\u3002<\/li><li>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u306b\u306f\u3001\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3068\u30d1\u30b9\u30ef\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/li><\/ul><\/section><section id='why-use' class='section'><h2>\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306e\u77e5\u8b58\u3092\u4f7f\u3046\u7406\u7531<\/h2><p>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u653b\u6483\u8005\u304c\u63a8\u6e2c\u3057\u306b\u304f\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u77ed\u3044\u6570\u5b57\u3084\u8a18\u53f7\u306e\u30eb\u30fc\u30eb\u3060\u3051\u3067\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u77ed\u3044\u5834\u5408\u3084\u4e88\u6e2c\u53ef\u80fd\u306a\u5834\u5408\u306b\u306f\u5341\u5206\u3067\u306f\u306a\u3044\u3053\u3068\u3082\u660e\u3089\u304b\u306b\u306a\u308a\u307e\u3059\u3002<\/p><p>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u5916\u90e8\u30ea\u30bd\u30fc\u30b9\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044: <a href='https:\/\/safety.google\/' target='_blank' rel=\"noopener\">Google \u306e\u5b89\u5168\u60c5\u5831<\/a>\u3001<a href='https:\/\/en.wikipedia.org\/wiki\/Password_strength' target='_blank' rel=\"noopener\">Wikipedia: \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u5f37\u5ea6<\/a>\u3001\u304a\u3088\u3073 <a href='https:\/\/cheatsheetseries.owasp.org\/cheatsheets\/Password_Storage_Cheat_Sheet.html' target='_blank' rel=\"noopener\">OWASP \u30d1\u30b9\u30ef\u30fc\u30c9 \u30c1\u30fc\u30c8\u30b7\u30fc\u30c8<\/a>\u3002<\/p><\/section><section id='howto' class='section'><h2>\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u9ad8\u3081\u308b\u65b9\u6cd5\uff08\u6bb5\u968e\u7684\uff09<\/h2><ol><li>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u9ad8\u3081\u308b\u306b\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u9577\u3055\u309212\u6587\u5b57\u4ee5\u4e0a\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/li><li>\u5c0f\u6587\u5b57\u30fb\u5927\u6587\u5b57\u30fb\u6570\u5b57\u30fb\u8a18\u53f7\u3092\u542b\u3080\u591a\u69d8\u306a\u6587\u5b57\u7a2e\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/li><li>\u7121\u95a2\u4fc2\u306a\u8a9e\u3092\u30e9\u30f3\u30c0\u30e0\u306a\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3068\u30b9\u30da\u30fc\u30b9\u3067\u7d44\u307f\u5408\u308f\u305b\u305f\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\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\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u751f\u6210\u30fb\u5b89\u5168\u306b\u4fdd\u5b58\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li><li>\u53ef\u80fd\u306a\u5834\u5408\u306f\u4e8c\u8981\u7d20\u8a8d\u8a3c\uff082FA\uff09\u3092\u6709\u52b9\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li><li>\u3088\u304f\u3042\u308b\u30d1\u30bf\u30fc\u30f3\u3001\u8f9e\u66f8\u8a9e\u3001\u660e\u3089\u304b\u306a\u7f6e\u63db\u306f\u907f\u3051\u307e\u3057\u3087\u3046\u3002<\/li><\/ol><\/section><section id='table' class='section'><h2>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306e\u6982\u8981: \u30af\u30a4\u30c3\u30af\u8868<\/h2><table aria-label='\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u8868'><thead><tr><th>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc \u30ec\u30d9\u30eb<\/th><th>\u4f8b\u306e\u9577\u3055<\/th><th>\u6982\u7b97\u30d3\u30c3\u30c8\u6570<\/th><th>\u5099\u8003<\/th><\/tr><\/thead><tbody><tr><td>\u4f4e<\/td><td>8 \u6587\u5b57<\/td><td>~26-34<\/td><td>\u6587\u5b57\u30bb\u30c3\u30c8\u304c\u9650\u5b9a\u7684\u3001\u307e\u305f\u306f\u4e88\u6e2c\u53ef\u80fd\u306a\u30d1\u30bf\u30fc\u30f3<\/td><\/tr><tr><td>\u4e2d<\/td><td>12 \u6587\u5b57<\/td><td>~78<\/td><td>\u30e9\u30f3\u30c0\u30e0\u3060\u304c\u9577\u3055\u306f\u4e2d\u7a0b\u5ea6<\/td><\/tr><tr><td>\u9ad8<\/td><td>16 \u6587\u5b57<\/td><td>~106+<\/td><td>\u30e9\u30f3\u30c0\u30e0\u6027\u304c\u9ad8\u3044\u5834\u5408\u306f\u5f37\u529b<\/td><\/tr><\/tbody><\/table><\/section><section id='safe' class='section'><h2>\u5b89\u5168\u3067\u5408\u6cd5\u306a\u5229\u7528<\/h2><p>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306e\u77e5\u8b58\u3092\u6d3b\u7528\u3057\u3066\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4fdd\u8b77\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u81ea\u5206\u304c ownership\u3057\u3066\u3044\u306a\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u89e3\u8aad\u3057\u3088\u3046\u3068\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3068\u6cd5\u7684\u8981\u4ef6\u3092\u5e38\u306b\u5c0a\u91cd\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/section><section id='faq' class='section'><h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2><div class='faq-item'><h3>\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3><p>\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306f\u3001\u53ef\u80fd\u306a\u7d44\u307f\u5408\u308f\u305b\u306e\u6570\u306b\u57fa\u3065\u304f\u4e88\u6e2c\u4e0d\u80fd\u6027\u306e\u5c3a\u5ea6\u3067\u3059\u3002\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u9ad8\u3044\u307b\u3069\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u63a8\u6e2c\u3059\u308b\u3053\u3068\u306f\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/p><\/div><div class='faq-item'><h3>\u3069\u306e\u304f\u3089\u3044\u306e\u30d3\u30c3\u30c8\u6570\u306e\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u5341\u5206\u306b\u5f37\u3044\u3067\u3059\u304b\uff1f<\/h3><p>\u4e00\u822c\u7684\u306a\u6307\u6a19\u3068\u3057\u3066\u300180\u30d3\u30c3\u30c8\u4ee5\u4e0a\u304c\u4e2d\u7a0b\u5ea6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001128\u30d3\u30c3\u30c8\u4ee5\u4e0a\u304c\u9ad8\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u3055\u308c\u307e\u3059\u304c\u3001\u5b9f\u969b\u306e\u30cb\u30fc\u30ba\u306f\u7528\u9014\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002<\/p><\/div><div class='faq-item'><h3>\u7279\u5b9a\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u3069\u3046\u8a08\u7b97\u3057\u307e\u3059\u304b\uff1f<\/h3><p>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc \u2248 log2(N^L) \u3068\u306a\u308a\u3001N \u306f\u6587\u5b57\u30bb\u30c3\u30c8\u306e\u30b5\u30a4\u30ba\u3001L \u306f\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u9577\u3055\u3067\u3059\u3002\u3088\u308a\u8907\u96d1\u306a\u30bb\u30c3\u30c8\u3068\u9577\u3044\u9577\u3055\u307b\u3069\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p><\/div><div class='faq-item'><h3>\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u306f\u77ed\u3044\u30e9\u30f3\u30c0\u30e0\u6587\u5b57\u5217\u3088\u308a\u5b89\u5168\u3067\u3059\u304b\uff1f<\/h3><p>\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u306f\u9577\u304f\u9ad8\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u6e90\u304b\u3089\u751f\u6210\u3055\u308c\u3066\u3044\u308c\u3070\u5b89\u5168\u306b\u306a\u308a\u5f97\u307e\u3059\u304c\u3001\u5e83\u7bc4\u306a\u6587\u5b57\u30bb\u30c3\u30c8\u306e\u30e9\u30f3\u30c0\u30e0\u306a\u6587\u5b57\u306f\u901a\u5e38\u30011\u6587\u5b57\u3042\u305f\u308a\u306e\u4e88\u6e2c\u4e0d\u80fd\u6027\u304c\u9ad8\u3044\u3067\u3059\u3002<\/p><\/div><div class='faq-item'><h3>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306f\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u9577\u3055\u3068\u95a2\u4fc2\u304c\u3042\u308a\u307e\u3059\u304b\uff1f<\/h3><p>\u306f\u3044\u3002\u9577\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u4e00\u822c\u306b\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u4e88\u6e2c\u53ef\u80fd\u307e\u305f\u306f\u7e70\u308a\u8fd4\u3057\u306e\u5834\u5408\u3092\u9664\u304d\u307e\u3059\u3002<\/p><\/div><div class='faq-item'><h3>\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306f\u4e8c\u8981\u7d20\u8a8d\u8a3c\u3068\u3069\u3046\u95a2\u4fc2\u3057\u307e\u3059\u304b\uff1f<\/h3><p>\u4e8c\u8981\u7d20\u8a8d\u8a3c\u306f\u8ffd\u52a0\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5c64\u3092\u63d0\u4f9b\u3057\u3001\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u4f4e\u3081\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u3082\u4fb5\u5bb3\u3092\u56f0\u96e3\u306b\u3057\u307e\u3059\u3002<\/p><\/div><\/section><section id='cta' class='section'><h2>\u4eca\u3059\u3050\u884c\u52d5\u3092\u8d77\u3053\u305d\u3046<\/h2><p>\u5f37\u529b\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u6226\u7565\u3067\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u9ad8\u3081\u307e\u3057\u3087\u3046\u3002\u79c1\u305f\u3061\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u751f\u6210\u30c4\u30fc\u30eb\u3092\u4f7f\u3044\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306e\u8a73\u7d30\u3092\u8aad\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p><p><a href='https:\/\/smspva.com\/generate-password.html' target='_blank' rel=\"noopener\">\u30d1\u30b9\u30ef\u30fc\u30c9\u751f\u6210\u30c4\u30fc\u30eb\u3092\u8a66\u3059<\/a> \u2014 \u6b21\u306b <a href='https:\/\/safety.google\/' target='_blank' rel=\"noopener\">Google \u306e\u5b89\u5168\u60c5\u5831<\/a> \u3067\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4fdd\u8b77\u3059\u308b\u30d2\u30f3\u30c8\u3092\u78ba\u8a8d\u3059\u308b\u304b\u3001<a href='https:\/\/en.wikipedia.org\/wiki\/Password_strength' target='_blank' rel=\"noopener\">Wikipedia: \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u5f37\u5ea6<\/a> \u304b\u3089\u5b66\u3093\u3067\u304f\u3060\u3055\u3044\u3002<\/p><\/section><section id='outro' class='section'><p>\u3055\u3089\u306b\u6d1e\u5bdf\u304c\u5fc5\u8981\u3067\u3059\u304b\uff1f \u30bb\u30ad\u30e5\u30a2\u306a\u8a8d\u8a3c\u3068\u30e6\u30fc\u30b6\u30fc\u691c\u8a3c\u306b\u95a2\u3059\u308b\u95a2\u9023\u30c8\u30d4\u30c3\u30af\u3092\u30d6\u30ed\u30b0\u3067\u63a2\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p><\/section><\/article>\n","protected":false},"excerpt":{"rendered":"<p>US \u30d1\u30b9\u30ef\u30fc\u30c9\u751f\u6210\u30c4\u30fc\u30eb \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc \u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u7c21\u5358\u306a\u8a00\u8449\u3067\u89e3\u8aac \u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u8aac\u660e\u3059\u308b\u3053\u3068\u3067\u3001\u9577\u304f\u3066\u30e9\u30f3\u30c0\u30e0\u306a\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u306a\u305c\u89e3\u8aad\u3055\u308c\u306b\u304f\u3044\u306e\u304b\u3092\u7406\u89e3\u3067\u304d\u307e\u3059\u3002\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u3069\u3046\u6a5f\u80fd\u3059\u308b\u304b\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u65b9\u6cd5\u3092\u3001\u5e73\u6613\u306a\u8a00\u8449\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002 \u8981\u7d04 \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306f\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u4e88\u6e2c\u4e0d\u80fd\u6027\u3092\u6e2c\u308b\u6307\u6a19\u3067\u3059\u3002 \u9577\u3055\u304c\u9577\u304f\u3001\u30e9\u30f3\u30c0\u30e0\u6027\u304c\u9ad8\u3044\u6587\u5b57\u3092\u4f7f\u3046\u3068\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u5897\u3048\u307e\u3059\u3002 \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u308b\u306b\u306f\u3001\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3068\u30d1\u30b9\u30ef\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002 \u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306e\u77e5\u8b58\u3092\u4f7f\u3046\u7406\u7531 \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u653b\u6483\u8005\u304c\u63a8\u6e2c\u3057\u306b\u304f\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002\u77ed\u3044\u6570\u5b57\u3084\u8a18\u53f7\u306e\u30eb\u30fc\u30eb\u3060\u3051\u3067\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u77ed\u3044\u5834\u5408\u3084\u4e88\u6e2c\u53ef\u80fd\u306a\u5834\u5408\u306b\u306f\u5341\u5206\u3067\u306f\u306a\u3044\u3053\u3068\u3082\u660e\u3089\u304b\u306b\u306a\u308a\u307e\u3059\u3002 \u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u5916\u90e8\u30ea\u30bd\u30fc\u30b9\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044: Google \u306e\u5b89\u5168\u60c5\u5831\u3001Wikipedia: \u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u5f37\u5ea6\u3001\u304a\u3088\u3073 OWASP \u30d1\u30b9\u30ef\u30fc\u30c9 \u30c1\u30fc\u30c8\u30b7\u30fc\u30c8\u3002 \u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u9ad8\u3081\u308b\u65b9\u6cd5\uff08\u6bb5\u968e\u7684\uff09 \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u9ad8\u3081\u308b\u306b\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u9577\u3055\u309212\u6587\u5b57\u4ee5\u4e0a\u306b\u3057\u307e\u3057\u3087\u3046\u3002 \u5c0f\u6587\u5b57\u30fb\u5927\u6587\u5b57\u30fb\u6570\u5b57\u30fb\u8a18\u53f7\u3092\u542b\u3080\u591a\u69d8\u306a\u6587\u5b57\u7a2e\u3092\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002 \u7121\u95a2\u4fc2\u306a\u8a9e\u3092\u30e9\u30f3\u30c0\u30e0\u306a\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3068\u30b9\u30da\u30fc\u30b9\u3067\u7d44\u307f\u5408\u308f\u305b\u305f\u30d1\u30b9\u30d5\u30ec\u30fc\u30ba\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\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\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u751f\u6210\u30fb\u5b89\u5168\u306b\u4fdd\u5b58\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u53ef\u80fd\u306a\u5834\u5408\u306f\u4e8c\u8981\u7d20\u8a8d\u8a3c\uff082FA\uff09\u3092\u6709\u52b9\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u3088\u304f\u3042\u308b\u30d1\u30bf\u30fc\u30f3\u3001\u8f9e\u66f8\u8a9e\u3001\u660e\u3089\u304b\u306a\u7f6e\u63db\u306f\u907f\u3051\u307e\u3057\u3087\u3046\u3002 \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306e\u6982\u8981: \u30af\u30a4\u30c3\u30af\u8868 \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc \u30ec\u30d9\u30eb \u4f8b\u306e\u9577\u3055 \u6982\u7b97\u30d3\u30c3\u30c8\u6570 \u5099\u8003 \u4f4e 8 \u6587\u5b57 ~26-34 \u6587\u5b57\u30bb\u30c3\u30c8\u304c\u9650\u5b9a\u7684\u3001\u307e\u305f\u306f\u4e88\u6e2c\u53ef\u80fd\u306a\u30d1\u30bf\u30fc\u30f3 \u4e2d 12 \u6587\u5b57 ~78 \u30e9\u30f3\u30c0\u30e0\u3060\u304c\u9577\u3055\u306f\u4e2d\u7a0b\u5ea6 \u9ad8 16 \u6587\u5b57 ~106+ \u30e9\u30f3\u30c0\u30e0\u6027\u304c\u9ad8\u3044\u5834\u5408\u306f\u5f37\u529b \u5b89\u5168\u3067\u5408\u6cd5\u306a\u5229\u7528 \u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306e\u77e5\u8b58\u3092\u6d3b\u7528\u3057\u3066\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4fdd\u8b77\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u81ea\u5206\u304c ownership\u3057\u3066\u3044\u306a\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u89e3\u8aad\u3057\u3088\u3046\u3068\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3068\u6cd5\u7684\u8981\u4ef6\u3092\u5e38\u306b\u5c0a\u91cd\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u3088\u304f\u3042\u308b\u8cea\u554f \u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f \u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u306f\u3001\u53ef\u80fd\u306a\u7d44\u307f\u5408\u308f\u305b\u306e\u6570\u306b\u57fa\u3065\u304f\u4e88\u6e2c\u4e0d\u80fd\u6027\u306e\u5c3a\u5ea6\u3067\u3059\u3002\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u9ad8\u3044\u307b\u3069\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u63a8\u6e2c\u3059\u308b\u3053\u3068\u306f\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002 \u3069\u306e\u304f\u3089\u3044\u306e\u30d3\u30c3\u30c8\u6570\u306e\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u5341\u5206\u306b\u5f37\u3044\u3067\u3059\u304b\uff1f \u4e00\u822c\u7684\u306a\u6307\u6a19\u3068\u3057\u3066\u300180\u30d3\u30c3\u30c8\u4ee5\u4e0a\u304c\u4e2d\u7a0b\u5ea6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001128\u30d3\u30c3\u30c8\u4ee5\u4e0a\u304c\u9ad8\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u3055\u308c\u307e\u3059\u304c\u3001\u5b9f\u969b\u306e\u30cb\u30fc\u30ba\u306f\u7528\u9014\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002&#8230;<\/p>\n","protected":false},"author":5,"featured_media":15010,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[252],"tags":[],"lang":"ja","translations":{"ja":15021,"en":15009,"es":15012,"zh":15013,"ar":15014,"fr":15015,"de":15016,"tr":15017,"it":15018,"pl":15019,"vi":15020,"pt":15022},"featured":{"id":15010,"url":"https:\/\/smspva.com\/blog\/wp-content\/uploads\/2026\/01\/password-entropy-explained-terms.png","alt":"Graphic showing password entropy levels for strong vs weak passwords"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u7c21\u5358\u306a\u8a00\u8449\u3067\u89e3\u8aac\u3059\u308b\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc<\/title>\n<meta name=\"description\" content=\"\u30d1\u30b9\u30ef\u30fc\u30c9\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u8aac\u660e\u3057\u307e\u3059\u3002\u30a8\u30f3\u30c8\u30ed\u30d4\u30fc\u304c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u4e0e\u3048\u308b\u5f71\u97ff\u3068\u3001\u5b9f\u7528\u7684\u306a\u624b\u9806\u3067\u4fdd\u8b77\u3092\u5f37\u5316\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u751f\u6210\u30c4\u30fc\u30eb\u3082\u8a66\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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