{"id":752,"date":"2026-06-05T13:18:47","date_gmt":"2026-06-05T04:18:47","guid":{"rendered":"https:\/\/okuru-link.com\/info\/?p=752"},"modified":"2026-05-15T13:20:49","modified_gmt":"2026-05-15T04:20:49","slug":"security-file-transfer-leak-prevention","status":"publish","type":"post","link":"https:\/\/okuru-link.com\/info\/blog\/usecase\/security-file-transfer-leak-prevention\/","title":{"rendered":"\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u3067\u60c5\u5831\u6f0f\u6d29\u304c\u8d77\u304d\u308b\u539f\u56e0\u3068\u3001\u4e8b\u524d\u306b\u3067\u304d\u308b\u5bfe\u7b56"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u30d5\u30a1\u30a4\u30eb\u9001\u53d7\u4fe1\u6642\u306e\u60c5\u5831\u6f0f\u6d29\u306f\u3001\u300c\u6c17\u3065\u304b\u306a\u3044\u307e\u307e\u8d77\u304d\u3066\u3057\u307e\u3046\u300d\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002<br>\u610f\u56f3\u7684\u306a\u653b\u6483\u3060\u3051\u3067\u306a\u304f\u3001\u9001\u4ed8\u5148\u306e\u9593\u9055\u3044\u3084\u8a2d\u5b9a\u306e\u898b\u843d\u3068\u3057\u306a\u3069\u3001\u65e5\u5e38\u7684\u306a\u64cd\u4f5c\u306e\u4e2d\u3067\u3082\u30ea\u30b9\u30af\u304c\u751f\u3058\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br>\n  \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u3067\u8d77\u3053\u308a\u3046\u308b\u30ea\u30b9\u30af\u3068\u3001\u5b89\u5168\u306b\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u78ba\u8a8d\u3057\u305f\u3044\u30dd\u30a4\u30f3\u30c8\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"okl-h2-spacer wp-block-paragraph\">&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading okl-h2\"><strong>\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u3067\u8d77\u3053\u308a\u3046\u308b\u4e3b\u306a\u30ea\u30b9\u30af<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#d97706\" class=\"has-inline-color\">\u5b9b\u5148\u3092\u9593\u9055\u3048\u3066\u5225\u306e\u76f8\u624b\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u9001\u3063\u3066\u3057\u307e\u3046<\/mark><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e1\u30fc\u30eb\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u6dfb\u4ed8\u3059\u308b\u969b\u3001\u5b9b\u5148\u306e\u5165\u529b\u30df\u30b9\u3084\u3001\u30aa\u30fc\u30c8\u30b3\u30f3\u30d7\u30ea\u30fc\u30c8\u3067\u610f\u56f3\u3057\u306a\u3044\u30a2\u30c9\u30ec\u30b9\u304c\u5165\u529b\u3055\u308c\u308b\u30b1\u30fc\u30b9\u3067\u3059\u3002\u4e00\u5ea6\u9001\u3063\u305f\u30e1\u30fc\u30eb\u306f\u3001\u5b8c\u5168\u306b\u53d6\u308a\u6d88\u305b\u306a\u3044\u30b1\u30fc\u30b9\u304c\u591a\u3044\u305f\u3081\u3001\u6c17\u3065\u3044\u305f\u3068\u304d\u306b\u306f\u624b\u9045\u308c\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#d97706\" class=\"has-inline-color\">URL\u304c\u610f\u56f3\u3057\u306a\u3044\u76f8\u624b\u306b\u8ee2\u9001\u30fb\u5171\u6709\u3055\u308c\u308b<\/mark><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9URL\u3092\u30e1\u30fc\u30eb\u3067\u9001\u3063\u305f\u5f8c\u3001\u53d7\u3051\u53d6\u3063\u305f\u76f8\u624b\u304c\u305d\u306e\u30e1\u30fc\u30eb\u3092\u7b2c\u4e09\u8005\u306b\u8ee2\u9001\u3057\u3066\u3057\u307e\u3046\u30b1\u30fc\u30b9\u3067\u3059\u3002URL\u3092\u77e5\u3063\u3066\u3044\u308b\u3060\u3051\u3067\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u8a2d\u5b9a\u306e\u5834\u5408\u3001\u8ee2\u9001\u5148\u306e\u7b2c\u4e09\u8005\u304c\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#d97706\" class=\"has-inline-color\">\u901a\u4fe1\u304c\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u72b6\u614b\u3067\u30c7\u30fc\u30bf\u304c\u9001\u3089\u308c\u308b<\/mark><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d5\u30a1\u30a4\u30eb\u9001\u53d7\u4fe1\u6642\u306e\u901a\u4fe1\u304c\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u901a\u4fe1\u7d4c\u8def\u4e0a\u3067\u30c7\u30fc\u30bf\u304c\u508d\u53d7\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u300chttps:\/\/\u300d\u304b\u3089\u59cb\u307e\u308b\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u901a\u4fe1\u304c\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3059\u76ee\u5b89\u306b\u306a\u308a\u307e\u3059\u3002\n  <br>\u305f\u3060\u3057\u3001HTTPS\u3060\u3051\u3067\u60c5\u5831\u6f0f\u6d29\u3092\u5b8c\u5168\u306b\u9632\u3052\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u8a8d\u8a3c\u8a2d\u5b9a\u3084\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3082\u91cd\u8981\u3067\u3059\u3002<!-- \u5c06\u6765\u30ea\u30f3\u30af\u5019\u88dc: SSL\u30fbHTTPS\u901a\u4fe1\u3068\u306f --><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#d97706\" class=\"has-inline-color\">\u6709\u52b9\u671f\u9650\u306e\u7ba1\u7406\u304c\u3067\u304d\u3066\u304a\u3089\u305a\u3001\u4e0d\u8981\u306a\u30a2\u30af\u30bb\u30b9\u304c\u6b8b\u308b<\/mark><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304c\u7d42\u4e86\u3057\u305f\u5f8c\u3082\u3001\u9001\u3063\u305fURL\u304c\u6709\u52b9\u306a\u307e\u307e\u6b8b\u3063\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3067\u3059\u3002\u610f\u56f3\u3057\u306a\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306e\u30a2\u30af\u30bb\u30b9\u304c\u8d77\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"okl-h2-spacer wp-block-paragraph\">&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading okl-h2\"><strong>\u5b89\u5168\u306a\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u306e\u305f\u3081\u306b\u78ba\u8a8d\u3057\u305f\u30445\u3064\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading okl-point-h3\">1. \u901a\u4fe1\u306f\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u308b\u304b\uff08SSL\/TLS\/HTTPS\u5bfe\u5fdc\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d5\u30a1\u30a4\u30eb\u306e\u9001\u53d7\u4fe1\u306bSSL\/TLS\uff08HTTPS\u901a\u4fe1\uff09\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<br>\n  \u30d6\u30e9\u30a6\u30b6\u306e\u30a2\u30c9\u30ec\u30b9\u30d0\u30fc\u306b\u300chttps:\/\/\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u30b5\u30fc\u30d3\u30b9\u304c\u5bfe\u8c61\u3067\u3059\u3002\u901a\u4fe1\u306e\u6697\u53f7\u5316\u306f\u3001\u30c7\u30fc\u30bf\u306e\u76d7\u8074\u3084\u508d\u53d7\u3092\u9632\u3050\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u5bfe\u7b56\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading okl-point-h3\">2. \u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u6642\u306b\u8a8d\u8a3c\u304c\u3042\u308b\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">URL\u3092\u77e5\u3063\u3066\u3044\u308b\u3060\u3051\u3067\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u30b5\u30fc\u30d3\u30b9\u306f\u3001URL\u304c\u6f0f\u308c\u305f\u3068\u304d\u306e\u30ea\u30b9\u30af\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<br>\n  \u30d1\u30b9\u30ef\u30fc\u30c9\u8a8d\u8a3c\u3084OTP\u8a8d\u8a3c\uff08\u30e1\u30fc\u30eb\u306b\u5c4a\u304f\u30ef\u30f3\u30bf\u30a4\u30e0\u30d1\u30b9\u30ef\u30fc\u30c9\uff09\u306a\u3069\u3001URL\u3092\u77e5\u3063\u3066\u3044\u308b\u3060\u3051\u3067\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<!-- \u5c06\u6765\u30ea\u30f3\u30af\u5019\u88dc: OTP\u30fb\u30ef\u30f3\u30bf\u30a4\u30e0\u30d1\u30b9\u30ef\u30fc\u30c9\u3068\u306f --><\/p>\n\n\n\n<h3 class=\"wp-block-heading okl-point-h3\">3. \u6709\u52b9\u671f\u9650\u306e\u8a2d\u5b9a\u304c\u3067\u304d\u308b\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u671f\u9593\u3092\u8a2d\u5b9a\u3067\u304d\u308b\u30b5\u30fc\u30d3\u30b9\u3092\u9078\u3076\u3068\u3001\u5fc5\u8981\u306a\u671f\u9593\u3092\u904e\u304e\u308b\u3068\u3001\u81ea\u52d5\u3067\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3067\u304d\u307e\u3059\u3002\u624b\u52d5\u3067\u306e\u524a\u9664\u3057\u5fd8\u308c\u3092\u9632\u3050\u3046\u3048\u3067\u3082\u91cd\u8981\u306a\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading okl-point-h3\">4. \u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u5c65\u6b74\u3092\u78ba\u8a8d\u3067\u304d\u308b\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8ab0\u304c\u3044\u3064\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u304b\u3092\u78ba\u8a8d\u3067\u304d\u308b\u6a5f\u80fd\u304c\u3042\u308b\u3068\u3001\u9001\u3063\u305f\u30d5\u30a1\u30a4\u30eb\u304c\u5c4a\u3044\u305f\u304b\u3001\u60f3\u5b9a\u5916\u306e\u30a2\u30af\u30bb\u30b9\u304c\u306a\u304b\u3063\u305f\u304b\u3092\u5f8c\u304b\u3089\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading okl-point-h3\">5. \u56fd\u5185\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u30c7\u30fc\u30bf\u304c\u4fdd\u7ba1\u3055\u308c\u3066\u3044\u308b\u304b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d5\u30a1\u30a4\u30eb\u304c\u56fd\u5185\u306e\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u306b\u4fdd\u7ba1\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3082\u3001\u9078\u5b9a\u306e\u57fa\u6e96\u306b\u306a\u308a\u307e\u3059\u3002<br>\n  \u6d77\u5916\u30b5\u30fc\u30d0\u30fc\u306b\u4fdd\u7ba1\u3055\u308c\u308b\u5834\u5408\u3001\u9069\u7528\u3055\u308c\u308b\u6cd5\u5f8b\u3084\u30c7\u30fc\u30bf\u4fdd\u8b77\u306e\u53d6\u308a\u6271\u3044\u304c\u65e5\u672c\u56fd\u5185\u3068\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u696d\u52d9\u4e0a\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u30c7\u30fc\u30bf\u306e\u4fdd\u7ba1\u5834\u6240\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304f\u3068\u5b89\u5fc3\u3067\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"okl-h2-spacer wp-block-paragraph\">&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading okl-h2\"><strong>\u3088\u304f\u3042\u308b\u8cea\u554f<\/strong><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Q. \u7121\u6599\u306e\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u30b5\u30fc\u30d3\u30b9\u306f\u5b89\u5168\u3067\u3059\u304b\uff1f<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u6599\u30b5\u30fc\u30d3\u30b9\u3067\u3082\u5b89\u5168\u306a\u4ed5\u7d44\u307f\u3092\u5099\u3048\u3066\u3044\u308b\u3082\u306e\u306f\u3042\u308a\u307e\u3059\u3002<br>\n  \u305f\u3060\u3057\u3001\u901a\u4fe1\u306e\u6697\u53f7\u5316\u30fb\u8a8d\u8a3c\u6a5f\u80fd\u30fb\u6709\u52b9\u671f\u9650\u8a2d\u5b9a\u30fb\u30c7\u30fc\u30bf\u306e\u4fdd\u7ba1\u5834\u6240\u306a\u3069\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u308f\u308b\u4ed5\u69d8\u306f\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u5229\u7528\u524d\u306b\u516c\u5f0f\u30b5\u30a4\u30c8\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u60c5\u5831\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Q. URL\u304c\u6f0f\u308c\u305f\u5834\u5408\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u304b\uff1f<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">URL\u3060\u3051\u3067\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u308b\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001URL\u304c\u6f0f\u308c\u308b\u3068\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<br>\n  \u30d1\u30b9\u30ef\u30fc\u30c9\u3084OTP\u8a8d\u8a3c\uff08\u30ef\u30f3\u30bf\u30a4\u30e0\u30d1\u30b9\u30ef\u30fc\u30c9\uff09\u304c\u5fc5\u8981\u306a\u8a2d\u5b9a\u306e\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001URL\u3092\u77e5\u3063\u3066\u3044\u308b\u3060\u3051\u3067\u306f\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u30ea\u30b9\u30af\u3092\u4e0b\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Q. 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