{"id":9150,"date":"2024-03-15T02:22:05","date_gmt":"2024-03-14T17:22:05","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%83%87%e3%83%bc%e3%82%bf%e3%81%ae%e6%9a%97%e5%8f%b7%e5%8c%96%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99\/"},"modified":"2025-08-04T00:08:09","modified_gmt":"2025-08-03T15:08:09","slug":"java%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%83%87%e3%83%bc%e3%82%bf%e3%81%ae%e6%9a%97%e5%8f%b7%e5%8c%96%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%83%87%e3%83%bc%e3%82%bf%e3%81%ae%e6%9a%97%e5%8f%b7%e5%8c%96%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99\/","title":{"rendered":"Java \u30d5\u30a1\u30a4\u30eb\u6697\u53f7\u5316\uff1a\u5b9f\u88c5\u65b9\u6cd5\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9"},"content":{"rendered":"

Java\u3067\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u65b9\u6cd5\u306f\u3001\u4e00\u822c\u7684\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3084API\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Java\u3067\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u4f8b\u3067\u3059\uff1a<\/p>\n

    \n
  1. \u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\uff1a<\/li>\n<\/ol>\n
    import<\/span> javax.crypto.Cipher;\r\nimport<\/span> javax.crypto.KeyGenerator;\r\nimport<\/span> javax.crypto.SecretKey;\r\nimport<\/span> javax.crypto.spec.SecretKeySpec;\r\n<\/code><\/pre>\n
      \n
    1. \u9375\u3092\u751f\u6210\u3059\u308b\uff1a<\/li>\n<\/ol>\n
      KeyGenerator<\/span> keyGenerator<\/span> =<\/span> KeyGenerator.getInstance(\"AES\"<\/span>);\r\nkeyGenerator.init(128<\/span>);\r\nSecretKey<\/span> secretKey<\/span> =<\/span> keyGenerator.generateKey();\r\n<\/code><\/pre>\n
        \n
      1. Cipher\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3066\u521d\u671f\u5316\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
        Cipher<\/span> cipher<\/span> =<\/span> Cipher.getInstance(\"AES\"<\/span>);\r\ncipher.init(Cipher.ENCRYPT_MODE, secretKey);\r\n<\/code><\/pre>\n
          \n
        1. \u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\uff1a<\/li>\n<\/ol>\n
          byte<\/span>[] inputData = \"Hello, World!\"<\/span>.getBytes();\r\nbyte<\/span>[] encryptedData = cipher.doFinal(inputData);\r\n<\/code><\/pre>\n
            \n
          1. \u30c7\u30fc\u30bf\u306e\u89e3\u8aad:<\/li>\n<\/ol>\n
            cipher.init(Cipher.DECRYPT_MODE, secretKey);\r\nbyte<\/span>[] decryptedData = cipher.doFinal(encryptedData);\r\nString<\/span> decryptedText<\/span> =<\/span> new<\/span> String<\/span>(decryptedData);\r\nSystem.out.println(\"Decrypted Text: \"<\/span> + decryptedText);\r\n<\/code><\/pre>\n
            \u3053\u308c\u306f\u5358\u306a\u308b\u4f8b\u3067\u3042\u308a\u3001\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u5177\u4f53\u7684\u306a\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3088\u308a\u5b89\u5168\u3067\u8907\u96d1\u306a\u6697\u53f7\u5316\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u6a5f\u5bc6\u30c7\u30fc\u30bf\u3092\u4fdd\u8b77\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            Java\u3067\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u65b9\u6cd5\u306f\u3001\u4e00\u822c\u7684\u306a\u6697\u53f7\u5316\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3084API\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001Java\u3067\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u4f8b\u3067\u3059\uff1a \u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\uff1a import javax […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[42,113,19,862,249],"class_list":["post-9150","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-java","tag-113","tag-19","tag-862","tag-249"],"yoast_head":"\nJava \u30d5\u30a1\u30a4\u30eb\u6697\u53f7\u5316\uff1a\u5b9f\u88c5\u65b9\u6cd5\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Java\u3067\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3092\u89e3\u8aac\u3002\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u4ed8\u304d\u3067\u3001\u521d\u5fc3\u8005\u3067\u3082\u7406\u89e3\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u4e01\u5be7\u306b\u8aac\u660e\u3057\u307e\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u5f79\u7acb\u3064\u60c5\u5831\u6e80\u8f09\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306e\u5b9f\u88c5\u65b9\u6cd5\u306f\u4f55\u3067\u3059\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java \u30d5\u30a1\u30a4\u30eb\u6697\u53f7\u5316\uff1a\u5b9f\u88c5\u65b9\u6cd5\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\" \/>\n<meta property=\"og:description\" content=\"Java\u3067\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u3092\u6697\u53f7\u5316\u3059\u308b\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3092\u89e3\u8aac\u3002\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u4ed8\u304d\u3067\u3001\u521d\u5fc3\u8005\u3067\u3082\u7406\u89e3\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u4e01\u5be7\u306b\u8aac\u660e\u3057\u307e\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u306b\u5f79\u7acb\u3064\u60c5\u5831\u6e80\u8f09\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u306e\u5b9f\u88c5\u65b9\u6cd5\u306f\u4f55\u3067\u3059\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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