{"id":477428,"date":"2023-08-09T09:14:50","date_gmt":"2023-08-09T09:14:50","guid":{"rendered":""},"modified":"2023-09-05T11:14:41","modified_gmt":"2023-09-05T11:14:41","slug":"hash-chain","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/hash-chain\/","title":{"rendered":"\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3"},"content":{"rendered":"<p>\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306f\u3001\u73fe\u4ee3\u306e\u591a\u304f\u306e\u5b89\u5168\u306a\u30c7\u30b8\u30bf\u30eb\u901a\u4fe1\u30b7\u30b9\u30c6\u30e0\u306e\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u6697\u53f7\u5316\u306e\u57fa\u672c\u6982\u5ff5\u3067\u3059\u3002\u30cf\u30c3\u30b7\u30e5 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\u3053\u306e\u30bf\u30a4\u30d7\u3067\u306f\u3001\u30c1\u30a7\u30fc\u30f3\u5185\u306e\u5404\u30cf\u30c3\u30b7\u30e5\u306b\u306f\u3001\u524d\u306e\u30cf\u30c3\u30b7\u30e5\u306b\u52a0\u3048\u3066\u79d8\u5bc6\u9375\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5f37\u5316\u3055\u308c\u3001\u653b\u6483\u8005\u304c\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3068\u4ee5\u524d\u306e\u30cf\u30c3\u30b7\u30e5\u306e\u4e00\u90e8\u3092\u77e5\u3063\u3066\u3044\u3066\u3082\u3001\u5c06\u6765\u306e\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30de\u30fc\u30af\u30eb\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3\uff08\u30de\u30fc\u30af\u30eb\u30c4\u30ea\u30fc\uff09:<\/strong> \u3053\u308c\u3089\u306f\u3001\u3059\u3079\u3066\u306e\u30ea\u30fc\u30d5 \u30ce\u30fc\u30c9\u306b\u30c7\u30fc\u30bf \u30d6\u30ed\u30c3\u30af\u306e\u30cf\u30c3\u30b7\u30e5\u306e\u30e9\u30d9\u30eb\u304c\u4ed8\u3051\u3089\u308c\u3001\u3059\u3079\u3066\u306e\u975e\u30ea\u30fc\u30d5 \u30ce\u30fc\u30c9\u306b\u305d\u306e\u5b50\u30ce\u30fc\u30c9\u306e\u30e9\u30d9\u30eb\u306e\u30cf\u30c3\u30b7\u30e5\u306e\u30e9\u30d9\u30eb\u304c\u4ed8\u3051\u3089\u308c\u308b\u30c4\u30ea\u30fc\u69cb\u9020\u3067\u3059\u3002Merkle \u30c4\u30ea\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5185\u5bb9\u3092\u52b9\u7387\u7684\u304b\u3064\u5b89\u5168\u306b\u691c\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<table>\n<thead>\n<tr>\n<th>\u30bf\u30a4\u30d7<\/th>\n<th>\u57fa\u672c\u7684\u306a\u8003\u3048\u65b9<\/th>\n<th>\u5229\u70b9<\/th>\n<th>\u77ed\u6240<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u30b7\u30f3\u30d7\u30eb\u306a\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3<\/td>\n<td>\u5404\u30cf\u30c3\u30b7\u30e5\u306f\u3001\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3092\u524d\u306e\u30cf\u30c3\u30b7\u30e5\u306b\u9069\u7528\u3057\u305f\u7d50\u679c\u3067\u3059\u3002<\/td>\n<td>\u7406\u89e3\u3057\u3084\u3059\u304f\u5b9f\u88c5\u3057\u3084\u3059\u3044<\/td>\n<td>\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u307e\u305f\u306f\u30c1\u30a7\u30fc\u30f3\u306e\u4e00\u90e8\u304c\u4fb5\u5bb3\u3055\u308c\u305f\u5834\u5408\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u4f4e\u4e0b\u3059\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u30ad\u30fc\u4ed8\u304d\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3<\/td>\n<td>\u5404\u30cf\u30c3\u30b7\u30e5\u306b\u306f\u3001\u524d\u306e\u30cf\u30c3\u30b7\u30e5\u306b\u52a0\u3048\u3066\u79d8\u5bc6\u30ad\u30fc\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/td>\n<td>\u653b\u6483\u306b\u5bfe\u3057\u3066\u3088\u308a\u5b89\u5168<\/td>\n<td>\u5c11\u3057\u8907\u96d1<\/td>\n<\/tr>\n<tr>\n<td>\u30de\u30fc\u30af\u30eb\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3\uff08\u30de\u30fc\u30af\u30eb\u30c4\u30ea\u30fc\uff09<\/td>\n<td>\u3059\u3079\u3066\u306e\u30ce\u30fc\u30c9\u306b\u30c7\u30fc\u30bf \u30d6\u30ed\u30c3\u30af\u306e\u30cf\u30c3\u30b7\u30e5\u307e\u305f\u306f\u305d\u306e\u5b50\u306e\u30e9\u30d9\u30eb\u306e\u30cf\u30c3\u30b7\u30e5\u304c\u30e9\u30d9\u30eb\u4ed8\u3051\u3055\u308c\u308b\u30c4\u30ea\u30fc\u69cb\u9020\u3002<\/td>\n<td>\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u52b9\u7387\u7684\u304b\u3064\u5b89\u5168\u306a\u691c\u8a3c\u304c\u53ef\u80fd<\/td>\n<td>\u3088\u308a\u8907\u96d1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u5b9f\u7528\u7684\u306a\u4f7f\u7528\u6cd5\u3001\u8ab2\u984c\u3001\u304a\u3088\u3073\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/h2>\n<p>\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306f\u3055\u307e\u3056\u307e\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u30b5\u30fc\u30d3\u30b9:<\/strong> \u3053\u308c\u3089\u306e\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30cf\u30c3\u30b7\u30e5\u304c\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306b\u542b\u307e\u308c\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u304c\u52b9\u679c\u7684\u306b\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30ef\u30f3\u30bf\u30a4\u30e0\u30d1\u30b9\u30ef\u30fc\u30c9 (OTP):<\/strong> \u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3 \u30d9\u30fc\u30b9\u306e OTP \u30b9\u30ad\u30fc\u30e0\u3067\u306f\u3001\u30b7\u30fc\u30b1\u30f3\u30b9\u5185\u306e\u5404\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u3001\u524d\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u30cf\u30c3\u30b7\u30e5\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3:<\/strong> \u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u5185\u306e\u3059\u3079\u3066\u306e\u30d6\u30ed\u30c3\u30af\u306b\u306f\u524d\u306e\u30d6\u30ed\u30c3\u30af\u306e\u30cf\u30c3\u30b7\u30e5\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u3092\u5f62\u6210\u3057\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u305f\u3060\u3057\u3001\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306b\u306f\u3001\u7279\u306b\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306e\u9078\u629e\u306b\u95a2\u3059\u308b\u3044\u304f\u3064\u304b\u306e\u8ab2\u984c\u3082\u3042\u308a\u307e\u3059\u3002\u95a2\u6570\u306f\u3001\u885d\u7a81 (2 \u3064\u306e\u7570\u306a\u308b\u5165\u529b\u304c\u540c\u3058\u30cf\u30c3\u30b7\u30e5\u3092\u751f\u6210\u3059\u308b) \u3068\u30d7\u30ea\u30a4\u30e1\u30fc\u30b8\u653b\u6483 (\u30cf\u30c3\u30b7\u30e5\u304b\u3089\u5143\u306e\u5165\u529b\u3092\u8a08\u7b97\u3059\u308b) \u306b\u5bfe\u3059\u308b\u8010\u6027\u304c\u5fc5\u8981\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5f37\u529b\u306a\u6697\u53f7\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306e\u9078\u629e\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<h2>\u985e\u4f3c\u7528\u8a9e\u3068\u306e\u6bd4\u8f03\u5206\u6790<\/h2>\n<p>\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306e\u6982\u5ff5\u306f\u3001\u4ed6\u306e\u3044\u304f\u3064\u304b\u306e\u6697\u53f7\u5316\u306e\u6982\u5ff5\u3068\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\n<p><strong>\u30cf\u30c3\u30b7\u30e5\u30ea\u30b9\u30c8:<\/strong> \u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u3068\u540c\u69d8\u306b\u3001\u30cf\u30c3\u30b7\u30e5 \u30ea\u30b9\u30c8\u3067\u306f\u8907\u6570\u306e\u5165\u529b\u3092\u30cf\u30c3\u30b7\u30e5\u3057\u3066\u30cf\u30c3\u30b7\u30e5\u51fa\u529b\u306e\u30ea\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u30cf\u30c3\u30b7\u30e5 \u30ea\u30b9\u30c8\u3067\u306f\u3001\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u3068\u306f\u7570\u306a\u308a\u3001\u30cf\u30c3\u30b7\u30e5\u306f\u4e92\u3044\u306b\u30ea\u30f3\u30af\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30cf\u30c3\u30b7\u30e5\u30c4\u30ea\u30fc:<\/strong> \u30cf\u30c3\u30b7\u30e5 \u30c4\u30ea\u30fc\u306f\u3001\u30de\u30fc\u30af\u30eb \u30c4\u30ea\u30fc\u3068\u3082\u547c\u3070\u308c\u3001\u30cf\u30c3\u30b7\u30e5 \u30ea\u30b9\u30c8\u3092\u4e00\u822c\u5316\u3057\u305f\u3082\u306e\u3067\u3042\u308a\u3001\u30cf\u30c3\u30b7\u30e5 \u30b7\u30fc\u30b1\u30f3\u30b9\u306e\u52b9\u7387\u7684\u306a\u8a08\u7b97\u3068\u691c\u8a3c\u3092\u53ef\u80fd\u306b\u3059\u308b\u30c4\u30ea\u30fc\u306e\u3088\u3046\u306a\u69cb\u9020\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3:<\/strong> \u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u306f\u3001\u5206\u6563\u30b7\u30b9\u30c6\u30e0\u3067\u5408\u610f\u3092\u9054\u6210\u3057\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u307e\u305f\u306f\u30c7\u30fc\u30bf\u4ea4\u63db\u306e\u5b89\u5168\u3067\u6539\u3056\u3093\u9632\u6b62\u6a5f\u80fd\u306e\u3042\u308b\u4e0d\u5909\u306e\u8a18\u9332\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u7279\u5b9a\u306e\u30bf\u30a4\u30d7\u306e\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u3067\u3059\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3\u306b\u95a2\u3059\u308b\u5c06\u6765\u5c55\u671b\u3068\u6280\u8853<\/h2>\n<p>\u30c7\u30b8\u30bf\u30eb\u4e16\u754c\u304c\u30c7\u30fc\u30bf\u4e3b\u5c0e\u578b\u306b\u306a\u308b\u306b\u3064\u308c\u3001\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306e\u3088\u3046\u306a\u52b9\u7387\u7684\u3067\u5b89\u5168\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u5fc5\u8981\u6027\u304c\u9ad8\u307e\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002\u5206\u6563\u578b\u53f0\u5e33\u3001\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u3001\u9ad8\u5ea6\u306a\u6697\u53f7\u5316\u30b7\u30b9\u30c6\u30e0\u306a\u3069\u306e\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u306f\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306b\u307e\u3059\u307e\u3059\u4f9d\u5b58\u3059\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u91cf\u5b50\u6697\u53f7\u3084\u30dd\u30b9\u30c8\u91cf\u5b50\u6697\u53f7\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u306a\u3069\u306e\u65b0\u3057\u3044\u6982\u5ff5\u3082\u3001\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3\u306e\u958b\u767a\u3068\u4f7f\u7528\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u3001\u3088\u308a\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u3082\u305f\u3089\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3068\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3\u306e\u95a2\u9023\u4ed8\u3051<\/h2>\n<p>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3068\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306f\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u304c\u3001\u7279\u5b9a\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u9023\u643a\u3057\u3066\u52d5\u4f5c\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u5f37\u5316\u3067\u304d\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u9593\u306e\u901a\u4fe1\u3092\u4fdd\u8b77\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3068\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30a6\u30a7\u30d6\u30b9\u30af\u30ec\u30a4\u30d4\u30f3\u30b0\u306b\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306a\u3069\u3001\u7279\u5b9a\u306e\u72b6\u6cc1\u3067\u306f\u3001\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u306f\u3001\u8ee2\u9001\u4e2d\u306b\u30c7\u30fc\u30bf\u304c\u5909\u66f4\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u691c\u8a3c\u3059\u308b\u65b9\u6cd5\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u5b89\u5168\u306a\u30c7\u30fc\u30bf\u5171\u6709\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d7\u30ed\u30ad\u30b7\u518d\u6697\u53f7\u5316\u30b9\u30ad\u30fc\u30e0\u3067\u306f\u3001\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u518d\u6697\u53f7\u5316\u64cd\u4f5c\u306e\u5b89\u5168\u3067\u691c\u8a3c\u53ef\u80fd\u306a\u8a18\u9332\u3092\u7dad\u6301\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<p>\u30cf\u30c3\u30b7\u30e5 \u30c1\u30a7\u30fc\u30f3\u3068\u305d\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ol>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Cryptographic_hash_function\" target=\"_new\" rel=\"noopener nofollow\">\u6697\u53f7\u30cf\u30c3\u30b7\u30e5\u95a2\u6570<\/a> \u2013 \u30a6\u30a3\u30ad\u30da\u30c7\u30a3\u30a2<\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Hash_chain\" target=\"_new\" rel=\"noopener nofollow\">\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3<\/a> \u2013 \u30a6\u30a3\u30ad\u30da\u30c7\u30a3\u30a2<\/li>\n<li><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1877050918303525\" target=\"_new\" rel=\"noopener nofollow\">\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3\u306e\u9b54\u6cd5<\/a> \u2013 \u30b5\u30a4\u30a8\u30f3\u30b9\u30c0\u30a4\u30ec\u30af\u30c8<\/li>\n<li><a href=\"https:\/\/www.cs.princeton.edu\/courses\/archive\/spr04\/cos433\/hash.htm\" target=\"_new\" rel=\"noopener nofollow\">\u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3068\u30cf\u30c3\u30b7\u30e5\u30c1\u30a7\u30fc\u30f3<\/a> - \u30d7\u30ea\u30f3\u30b9\u30c8\u30f3\u5927\u5b66<\/li>\n<li><a href=\"https:\/\/www.ibm.com\/blogs\/blockchain\/2019\/09\/blockchain-basics-intro-to-hashes-and-merkle-trees\/\" target=\"_new\" rel=\"noopener nofollow\">\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u306e\u57fa\u790e: \u30cf\u30c3\u30b7\u30e5\u95a2\u6570\u3068\u30de\u30fc\u30af\u30eb\u30c4\u30ea\u30fc<\/a> \u2013 IBM \u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3 \u30d6\u30ed\u30b0<\/li>\n<li><a href=\"https:\/\/www.varonis.com\/blog\/what-is-a-proxy-server\/\" target=\"_new\" rel=\"noopener nofollow\">\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3068\u306f\u4f55\u3067\u3059\u304b?\u307e\u305f\u305d\u306e\u4ed5\u7d44\u307f\u306f\u4f55\u3067\u3059\u304b?<\/a> \u2013 Varonis \u30d6\u30ed\u30b0<\/li>\n<\/ol>","protected":false},"featured_media":477429,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477428","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Hash Chain: A Key Element of Secure Digital Communications<\/mark>","faq_items":[{"question":"What is a Hash Chain?","answer":"<p>A Hash Chain is a sequence of hash values where each hash is created from the preceding one, using a specific hash function. This structure is a form of data organization, linking a series of data items, where each subsequent item is cryptographically dependent on its predecessor.<\/p>"},{"question":"What are the key features of Hash Chains?","answer":"<p>Hash Chains provide several key features, including immutability (cannot be altered without detection), one-way transformation (computationally infeasible to retrieve the original input from the hash value), unpredictability (nearly impossible to predict the next hash in a chain without knowing the input and the hash function), and efficiency (quick computation and verification).<\/p>"},{"question":"What types of Hash Chains exist?","answer":"<p>There are several types of Hash Chains based on their usage in different cryptographic schemes: Simple Hash Chains, Keyed Hash Chains, and Merkle Hash Chains (Merkle Trees).<\/p>"},{"question":"How are Hash Chains used in practice?","answer":"<p>Hash Chains are used in various applications like Time-Stamping Services (providing a timestamp for a document), One-Time Passwords (generating each password in a sequence by hashing the previous password), and Blockchain (where every block includes the hash of the previous block, forming a hash chain).<\/p>"},{"question":"How are Proxy Servers associated with Hash Chains?","answer":"<p>Proxy servers and hash chains can work together to enhance security and privacy. Hash chains can secure the communication between a client and a proxy server, ensure data integrity and authenticity, and in certain contexts like web scraping, validate that the data hasn't been altered during transit.<\/p>"},{"question":"What are the future perspectives related to Hash Chains?","answer":"<p>As we progress further into the data-driven digital world, the importance of efficient and secure data structures like hash chains is expected to increase. They will likely be more prevalent in technologies like distributed ledgers, blockchain, and advanced cryptographic systems. Also, emerging concepts like quantum cryptography and post-quantum cryptographic hash functions could influence the development and use of hash chains.<\/p>"},{"question":"What resources can I use for further information about Hash Chains?","answer":"<p>Here are some resources for further reading:<\/p><ol><li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Cryptographic_hash_function\" target=\"_new\">Cryptographic Hash Functions<\/a> - Wikipedia<\/li><li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Hash_chain\" target=\"_new\">Hash Chain<\/a> - Wikipedia<\/li><li><a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S1877050918303525\" target=\"_new\">The Magic of Hash Chain<\/a> - ScienceDirect<\/li><li><a href=\"https:\/\/www.cs.princeton.edu\/courses\/archive\/spr04\/cos433\/hash.htm\" target=\"_new\">Hash functions and hash chains<\/a> - Princeton University<\/li><li><a href=\"https:\/\/www.ibm.com\/blogs\/blockchain\/2019\/09\/blockchain-basics-intro-to-hashes-and-merkle-trees\/\" target=\"_new\">Blockchain Basics: Hash Functions and Merkle Trees<\/a> - IBM Blockchain Blog<\/li><li><a href=\"https:\/\/www.varonis.com\/blog\/what-is-a-proxy-server\/\" target=\"_new\">What is a Proxy Server and How Does it Work?<\/a> - Varonis Blog<\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/477428","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/477428\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/477429"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=477428"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}