{"id":1460,"date":"2022-05-17T00:00:00","date_gmt":"2022-05-17T00:00:00","guid":{"rendered":"urn:uuid:2ecc16ae-54f0-48f2-ae15-8436bfdae810"},"modified":"2022-05-17T00:00:00","modified_gmt":"2022-05-17T00:00:00","slug":"liang-zi-an-hao-dan-yi-guang-zi-topian-guang-woshi-ubb84","status":"publish","type":"post","link":"https:\/\/www.sekaiken.com\/?p=1460","title":{"rendered":"\u91cf\u5b50\u6697\u53f7\u3000\u5358\u4e00\u5149\u5b50\u3068\u504f\u5149\u3092\u4f7f\u3046BB84"},"content":{"rendered":"

\u91cf\u5b50\u6697\u53f7\u3068\u3044\u3046\u306e\u306f\u3001\u9001\u4fe1\u8005(Alice\u3068\u3044\u3046\u3053\u3068\u304c\u591a\u3044\uff09\u3068\u53d7\u4fe1\u8005\uff08Bob)\u306e\u9593\u3067\u3042\u3089\u304b\u3058\u3081\u8907\u6570\u306e\u6697\u53f7\u8868\u3092\u5171\u6709\u3057\u3066\u304a\u3044\u3066\u3001\u300c\u3053\u308c\u304b\u3089\u4f55\u756a\u306e\u6697\u53f7\u8868\u3092\u4f7f\u3046\u304b\u3089\u300d\u3068\u3044\u3046\u6570\u5b57\uff11\u3064\u3092\u5b89\u5168\u306b\u9001\u308c\u308c\u3070\u826f\u3057\u3068\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002\u305d\u306e\u6570\u5b57\u306e\u9001\u308a\u65b9\u306b\u91cf\u5b50\u529b\u5b66\u3092\u4f7f\u3044\u307e\u3059\u3002\u4e00\u756a\u6700\u521d\u306b\u63d0\u6848\u3055\u308c\u305f\u306e\u304cBB84\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3001\u504f\u5149\u306e\u6027\u8cea\u3092\u4f7f\u3044\u307e\u3059\u3002
\n\u504f\u5149\u5b50\u306f\u3001\u5358\u7d14\u5316\u3059\u308b\u3068\u3001\u96fb\u7dda\u304c\u4e00\u65b9\u5411\u306b\u5e73\u884c\u306b\u5bc6\u96c6\u3057\u3066\u5f35\u3063\u3066\u3042\u308b\u677f\u3067\u3001\u504f\u5149\u306e\u96fb\u5834\u304c\u96fb\u7dda\u306b\u5e73\u884c\u3060\u3068\u96fb\u5b50\u304c\u52d5\u3044\u3066\u5149\u3092\u5438\u53ce\u3059\u308b\u304c\u3001\u5782\u76f4\u3060\u3068\u5438\u53ce\u3057\u306a\u3044\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3067\u3059\u3002\u3055\u3066\u3001\u4e00\u65b9\u5411\u306b\u504f\u5149\u3057\u305f\u5149\uff08\u76f4\u7dda\u504f\u5149\uff09\u3092\u3001\u305d\u308c\u306845\u00b0\u306e\u5411\u304d\u306e\u504f\u5149\u5b50\u306b\u901a\u3057\u305f\u3068\u3057\u307e\u3057\u3087\u3046\u3002\u539f\u7406\u304b\u3089\u3001\u51fa\u3066\u304f\u308b\u5149\u306f\u65b0\u305f\u306a\u504f\u5149\u5b50\u306e\u900f\u904e\u3059\u308b\u5411\u304d\u3067\u3001\u96fb\u5834\u5f37\u5ea6\u306f1\/\u221a2\uff08\u5149\u306e\u5f37\u3055\u306f\u305d\u306e\u4e8c\u4e57\u30671\/2)\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u307e\u3067\u306f\u91cf\u5b50\u529b\u5b66\u306f\u51fa\u3066\u304d\u3066\u3044\u307e\u305b\u3093\u3002
\n\u5149\u3092\u5f31\u304f\u3057\u3066\u3044\u304f\u3068\u3001\u691c\u51fa\u53ef\u80fd\u304b\u3069\u3046\u304b\u304e\u308a\u304e\u308a\u306e\u5f37\u5ea6\u304c\u3042\u308a\u3001\u5358\u4e00\u5149\u5b50(single photon)\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u6700\u521d\u306e\u504f\u5149\u3092\u5358\u4e00\u5149\u5b50\u306b\u3057\u3066\u304a\u304f\u3068\u300145\u00b0\u306e\u504f\u5149\u5b50\u3092\u901a\u3057\u305f\u5f8c\u306f1\/2\u306e\u78ba\u7387\u3067\u691c\u51fa\u3055\u308c\u305f\u308a\u3057\u306a\u304b\u3063\u305f\u308a\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3001\u91cf\u5b50\u529b\u5b66\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u3055\u3066\u3001BB84\u306e\u4ed5\u7d44\u307f\u306f\u56f3\u304c\u8981\u308b\u306e\u3067\u3001wikipedia\u306e\u8aac\u660e\u3092\u898b\u307e\u3057\u3087\u3046\u3002\u4e0b\u8a18\u306f\u308f\u304b\u308a\u3084\u3059\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\nhttps:\/\/ja.wikipedia.org\/wiki\/%E9%87%8F%E5%AD%90%E9%8D%B5%E9%85%8D%E9%80%81#BB84_protocol:Charles_H._Bennett_and_Gilles_Brassard<\/em>(1984)
\n\u4e0a\u624b\u304f\u3044\u304d\u305d\u3046\u3067\u3059\u304c\u3001\u9577\u8ddd\u96e2\u4f1d\u9001\u3067\u306f\u5149\u304c\u9014\u4e2d\u3067\u6e1b\u8870\u3059\u308b\u306e\u3067\u300c\u5358\u4e00\u5149\u5b50\u300d\u3068\u3044\u3046\u30ae\u30ea\u30ae\u30ea\u306e\u5f37\u5ea6\u3067\u306f\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u3069\u3046\u3059\u308b\u304b\u306f\u660e\u65e5\u3067\u3059\u3002<\/p>\n

\u82f1\u8a9e\u306f\u4e0a\u8a18\u2192DeepL\u3092\u4f7f\u3063\u3066\u95a2\u9023\u7528\u8a9e\u3092\u96c6\u3081\u3066\u307f\u307e\u3059\u3002
\n“It seems to work, but long-distance transmission becomes difficult at the very edge of “single-photon” intensity because the light attenuates along the way.” \u3088\u3055\u305d\u3046\u3067\u3059\u306d\u3002
\n\u5358\u4e00\u5149\u5b50\u3068\u3044\u3046\u30ae\u30ea\u30ae\u30ea\u306e\u5f37\u5ea6\u3000at the very edge of “single photon” intensity \u3044\u3044\u8a33\u3067\u3059\u3002”the very” \u306e\u96f0\u56f2\u6c17\u304c\u5206\u304b\u308b\u3088\u3046\u3044\u306a\u3063\u3066\u304f\u3060\u3055\u3044\u3002
\n\u6e1b\u8870\u3059\u308b\u3000attenuate \u30a2\u300c\u30c6\u300d\u30cb\u30e5\u30a8\u30a4\u30c8
\n\u4fe1\u53f7\u304c\u6e1b\u8870\u3059\u308b\u306e\u306fdecay\u3088\u308a\u3082attenuate \u3067\u3059\u306d\u3002\u3069\u3061\u3089\u3082\u4f7f\u3048\u307e\u3059\u304c\u3001attenuator \u30a2\u30c3\u30c6\u30cd\u30fc\u30bf\uff08\u82f1\u8a9e\u306f\u30a2\u300c\u30c6\u300d\u30cb\u30e5\u30a8\u30a4\u30bf\uff09\u3000\u3068\u3044\u3046\u30aa\u30fc\u30c7\u30a3\u30aa\u7528\u8a9e\u3082\u3042\u308a\u307e\u3059\u3002
\n“It has an intensity that is just barely detectable and is called a single photon.”
\n\u691c\u51fa\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u304e\u308a\u304e\u308a\uff1d\u3000just barely detectable\u3000\u3046\u307e\u304f\u8a33\u3057\u3066\u3044\u307e\u3059\u306d\u3002
\n\u504f\u5149\u3000polarized light
\n\u76f4\u7dda\u504f\u5149\u3000linearly polarized light
\n\u5186\u504f\u5149 circularly polarized light
\n“Quantum cryptography seems to be a method in which multiple cipher tables are shared between the sender (often Alice) and the receiver (Bob) in advance, and it is sufficient to be able to securely send a single number, “I’m going to use the number cipher table.” \u3000“seems to be”\u306b\u5f15\u3063\u304b\u304b\u308a\u307e\u3059\u304c\uff08\u82f1\u8a9e\u3060\u3068 is \u306e\u65b9\u304c\u826f\u3044\uff09\u3001 \u81ea\u5206\u3067\u8a33\u3059\u3088\u308a\u3082\u65e9\u3044\u306e\u3067\u5acc\u306b\u306a\u3063\u3061\u3083\u3044\u307e\u3059\u306d\u3002
\n\u3042\u3089\u304b\u3058\u3081\u3000in advance
\n\u6697\u53f7\u8868\u3000a cipher table
\n\u5acc\u306b\u306a\u3063\u3061\u3083\u3044\u307e\u3059\u306d\u3002I hate it \/ It’s disgusting. \/ I’m sick of it. “It’s so much faster than translating it myself, I hate it.” \u3060\u305d\u3046\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u91cf\u5b50\u6697\u53f7\u3068\u3044\u3046\u306e\u306f\u3001\u9001\u4fe1\u8005(Alice\u3068\u3044\u3046\u3053\u3068\u304c\u591a\u3044\uff09\u3068\u53d7\u4fe1\u8005\uff08Bob)\u306e\u9593\u3067\u3042\u3089\u304b\u3058\u3081\u8907\u6570\u306e\u6697\u53f7\u8868\u3092\u5171\u6709\u3057\u3066\u304a\u3044\u3066\u3001\u300c\u3053\u308c\u304b\u3089\u4f55\u756a\u306e\u6697\u53f7\u8868\u3092\u4f7f\u3046\u304b\u3089\u300d\u3068\u3044\u3046\u6570\u5b57\uff11\u3064\u3092\u5b89\u5168\u306b\u9001\u308c\u308c\u3070\u826f\u3057\u3068\u3057\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002\u305d\u306e\u6570\u5b57\u306e\u9001\u308a\u65b9\u306b\u91cf\u5b50\u529b\u5b66\u3092\u4f7f\u3044\u307e\u3059\u3002\u4e00\u756a\u6700\u521d\u306b\u63d0\u6848\u3055\u308c\u305f\u306e\u304cBB84\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3001\u504f\u5149\u306e\u6027\u8cea\u3092\u4f7f\u3044\u307e\u3059\u3002 \u504f\u5149\u5b50\u306f\u3001\u5358\u7d14\u5316\u3059\u308b\u3068\u3001\u96fb\u7dda\u304c\u4e00\u65b9\u5411\u306b\u5e73\u884c\u306b\u5bc6\u96c6\u3057\u3066\u5f35\u3063\u3066\u3042\u308b\u677f\u3067\u3001\u504f\u5149\u306e\u96fb\u5834\u304c\u96fb\u7dda\u306b\u5e73\u884c\u3060\u3068\u96fb\u5b50\u304c\u52d5\u3044\u3066\u5149\u3092\u5438\u53ce\u3059\u308b\u304c\u3001\u5782\u76f4\u3060\u3068\u5438\u53ce\u3057\u306a\u3044\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3067\u3059\u3002\u3055\u3066\u3001\u4e00\u65b9\u5411\u306b\u504f\u5149\u3057\u305f\u5149\uff08\u76f4\u7dda\u504f\u5149\uff09\u3092\u3001\u305d\u308c\u306845\u00b0\u306e\u5411\u304d\u306e\u504f\u5149\u5b50\u306b\u901a\u3057\u305f\u3068\u3057\u307e\u3057\u3087\u3046\u3002\u539f\u7406\u304b\u3089\u3001\u51fa\u3066\u304f\u308b\u5149\u306f\u65b0\u305f\u306a\u504f\u5149\u5b50…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[42],"tags":[5],"class_list":["post-1460","post","type-post","status-publish","format-standard","hentry","category-tech","tag-tech"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts\/1460","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1460"}],"version-history":[{"count":0,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts\/1460\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}