{"id":78,"date":"2019-12-07T12:55:00","date_gmt":"2019-12-07T03:55:00","guid":{"rendered":"http:\/\/stevenoh0908.kro.kr\/blog\/?p=78"},"modified":"2020-11-30T14:10:30","modified_gmt":"2020-11-30T05:10:30","slug":"blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1","status":"publish","type":"post","link":"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/","title":{"rendered":"Blockchain \uacf5\ubd80 \ub178\ud2b8 #1"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"blockchain-1\">Blockchain #1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc624\ub298\ubd80\ud130 \ube14\ub85d\uccb4\uc778 \uacf5\ubd80\ub97c \uc2dc\uc791\ud558\uae30\ub85c \ud588\ub2e4. Tutorialspoint\uc5d0 \ub531 \uac15\uc758\uac00 \uc788\uae38\ub798 \ud765\ubbf8\uac00 \uc0dd\uaca8\uc11c \ubc30\uc6b0\uae30\ub85c \uacb0\uc815.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <a href=\"https:\/\/www.tutorialspoint.com\/blockchain\/index.htm\">\uc5ec\uae30<\/a>\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\ub2e4.<br><\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#%ED%95%B4%EC%8B%9CHash\" >\ud574\uc2dc(Hash)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#%EB%B8%94%EB%A1%9D_%EC%B2%B4%EC%9D%B8%EC%9D%98_%EA%B0%9C%EB%A1%A0\" >\ube14\ub85d \uccb4\uc778\uc758 \uac1c\ub860<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Double-Spending_Problem\" >Double-Spending Problem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Bitcoin\" >Bitcoin<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#PKIPublic_Key_Cryptography\" >PKI(Public Key Cryptography)<\/a><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Enctyption_Decryption\" >Enctyption, Decryption<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Symmetric_Key_Algorithm%EB%8C%80%EC%B9%AD_%ED%82%A4_%EC%95%8C%EA%B3%A0%EB%A6%AC%EC%A6%98\" >Symmetric Key Algorithm(\ub300\uce6d \ud0a4 \uc54c\uace0\ub9ac\uc998)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Asymmetric_Key_Algorithm%EB%B9%84%EB%8C%80%EC%B9%AD_%ED%82%A4_%EC%95%8C%EA%B3%A0%EB%A6%AC%EC%A6%98\" >Asymmetric Key Algorithm(\ube44\ub300\uce6d \ud0a4 \uc54c\uace0\ub9ac\uc998)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Public_Key_Private_Key\" >Public Key &amp; Private Key<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#In_Real_World\" >In Real World<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Hashing\" >Hashing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Mining\" >Mining<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/#Chaining_Blocks\" >Chaining Blocks<\/a><\/li><\/ul><\/nav><\/div>\n<h4 class=\"wp-block-heading\" id=\"\ud574\uc2dchash\"><span class=\"ez-toc-section\" id=\"%ED%95%B4%EC%8B%9CHash\"><\/span>\ud574\uc2dc(Hash)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"> <em>\ud574\uc2dc \ud568\uc218<\/em>\ub294 \uc784\uc758\uc758 \uae38\uc774\ub97c \uac16\ub294 \uc784\uc758\uc758 \ub370\uc774\ud130\uc5d0 \ub300\ud558\uc5ec \uace0\uc815\ub41c \uae38\uc774\uc758 \ub370\uc774\ud130\ub85c \ub9e4\ud551\ud558\ub294 \ud568\uc218\ub97c \ub9d0\ud55c\ub2e4. \uc774\ub7ec\ud55c \ud574\uc2dc \ud568\uc218\ub97c \uc801\uc6a9\ud558\uc5ec \ub098\uc628 \uace0\uc815\ub41c \uae38\uc774\uc758 \uac12\uc744&nbsp;<em>\ud574\uc2dc\uac12<\/em>, \ub610\ub294 \ud574\uc2dc \ucf54\ub4dc, \ud574\uc2dc\uc12c(hash sum) \ub4f1\uc73c\ub85c\ub3c4 \ubd88\ub9b0\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \ud574\uc2dc \ud568\uc218\ub294 \ubcf4\ud1b5 \uc785\ub825\uac12\uc758 \ubc94\uc704\ubcf4\ub2e4 \ucd9c\ub825\uac12\uc758 \ubc94\uc704\ubcf4\ub2e4 \uc881\uc740 \uacbd\uc6b0\uac00 \ub9ce\uae30 \ub54c\ubb38\uc5d0 \uc785\ub825\uc774 \ub2e4\ub984\uc5d0\ub3c4 \ubd88\uad6c\ud558\uace0 \ub4dc\ubb3c\uac8c \ub3d9\uc77c\ud55c \uac12\uc774 \ucd9c\ub825\ub418\ub294 \uacbd\uc6b0\uac00 \uc788\ub294\ub370, \uc774\ub294 \ube44\ub458\uae30 \uc9d1\uc758 \uc6d0\ub9ac\uc5d0 \uc758\ud55c\ub2e4. \uc774\ub7ec\ud55c \uacbd\uc6b0\ub97c \u2018\ucda9\ub3cc\u2019\ud55c\ub2e4\uace0 \ud558\uba70, \uc6d0\uce59\uc801\uc73c\ub85c \ud574\uc2dc \ud568\uc218\ub294 \uc774\ub7f0 \uc5b4\uca54 \uc218 \uc5c6\ub294 \ucda9\ub3cc\uc744 \uc81c\uc678\ud558\uace0 \uc758\ub3c4\uc801\uc73c\ub85c \ucda9\ub3cc\uc744 \uacc4\uc0b0\ud574\ub0bc \uc218 \uc5c6\uc5b4\uc57c \ud55c\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"\ube14\ub85d-\uccb4\uc778\uc758-\uac1c\ub860\"><span class=\"ez-toc-section\" id=\"%EB%B8%94%EB%A1%9D_%EC%B2%B4%EC%9D%B8%EC%9D%98_%EA%B0%9C%EB%A1%A0\"><\/span>\ube14\ub85d \uccb4\uc778\uc758 \uac1c\ub860<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"> <em>\ube14\ub85d\uccb4\uc778<\/em>\uc740 \u2018\ube14\ub85d\u2019\uc774\ub77c\uace0 \ubd88\ub9ac\ub294 \uae30\ub85d\uc758 \u2018\ub9ac\uc2a4\ud2b8\u2019\uc5d0 \uc0c1\uc751\ud558\ub294 \uac1c\ub150\uc758 \uae30\uc220\uc774\ub2e4. \uac01\uac01\uc758 \ube14\ub85d\ub4e4\uc740 \uadf8 \uc774\uc804 \ube14\ub85d\uc5d0 \ub300\ud55c \uc554\ud638\ud559\uc801 \ud574\uc2dc\uc640, \ud0c0\uc784\uc2a4\ud0ec\ud504, \uac70\ub798 \uc815\ubcf4\ub97c \ub2f4\ub294\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"double-spending-problem\"><span class=\"ez-toc-section\" id=\"Double-Spending_Problem\"><\/span>Double-Spending Problem<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.tutorialspoint.com\/blockchain\/images\/double_spending.jpg\" alt=\"bob1\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \ud604\uc2e4 \uc138\uacc4\uc5d0\uc11c\uc758 \uac70\ub798\ub294 \uc704\uc758 \uadf8\ub9bc\uacfc \uac19\uc774 \uc9c4\ud589\ub41c\ub2e4. \ubc25\uc774 \ub9ac\uc0ac\uc5d0\uac8c 10$\ub97c \uc9c0\ubd88\ud558\uace0 \ub9ac\uc0ac\ub294 \ubc25\uc5d0\uac8c \ucc45\uc744 \uac74\ub128\ub2e4. \ubc25\uc774 \ub9ac\uc0ac\uc5d0\uac8c 10$\uc744 \uc9c0\ubd88\ud558\uba74, \uadf8 \uc9c0\ud3d0\ub294 \ub9ac\uc0ac\uc758 \uc218\uc911\uc5d0 \uc788\uace0 \ubc25\uc740 \uc774\ub97c \ub2e4\uc2dc\ub294 \uc0ac\uc6a9\ud560 \uc218 \uc5c6\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.tutorialspoint.com\/blockchain\/images\/paid_digital_form.jpg\" alt=\"bob2\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \ud55c \ud3b8 \ub514\uc9c0\ud138 \uc138\uacc4\uc5d0\uc11c \uc774\ub97c \uac80\ud1a0\ud558\uba74 \uc0c1\ud669\uc774 \ub2ec\ub77c\uc9c4\ub2e4. \ubc25\uc740 \uc5b4\ub5a4 \uc77c\ub828\uc758 \ubc14\uc774\ub108\ub9ac \ud30c\uc77c \ud615\ud0dc\ub85c \uad6c\uc131\ub41c Digital Coin\uc744 \ub9ac\uc0ac\uc5d0\uac8c \ud30c\uc77c \uc804\uc1a1\ud558\uc5ec \ucc45\uc744 \uc0ac\ub294 \ud55c \ud3b8, \uc568\ub9ac\uc2a4\uc5d0\uac8c\ub3c4 \uc774 \ubcf5\uc0ac\ubcf8\uc744 \uc804\uc1a1\ud574\uc11c \uc0ac\uacfc 5\uac1c\ub97c \uc8fc\ubb38\ud560 \uc218\ub3c4 \uc788\ub294 \uac83\uc774\ub2e4. \ub9ac\uc0ac\uc640 \uc568\ub9ac\uc2a4 \ubaa8\ub450 \ubc25\uc5d0\uac8c\uc11c 10$\uc744 \ubc1b\uc558\ub2e4\uace0 \uc0dd\uac01\ud560 \uc218\ubc16\uc5d0 \uc5c6\ub2e4. \uc989, \ub514\uc9c0\ud138 \uc138\uacc4\uc5d0\uc11c\uc758 \uac70\ub798\ub294 \ud604\uc2e4 \uc138\uacc4\uc758 \uac70\ub798\uc640\ub294 \ub2ec\ub9ac \uadf8 \uac70\ub798\uc758 \ud654\ud3d0\uac00 \uc804\uc1a1 \uc774\ud6c4\uc5d0 \ubc18\ub4dc\uc2dc \uc0ac\ub77c\uc9c0\ub294 \uac83\uc774 \uc544\ub2c8\ubbc0\ub85c, \uc774\uc911 \uc9c0\ubd88(Double-Spending)\uc774 \uac00\ub2a5\ud574\uc9c0\ub294 \uac83\uc774\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.tutorialspoint.com\/blockchain\/images\/centrailized_authority.jpg\" alt=\"bob3\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc774 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc9c0\uae08\uae4c\uc9c0\ub294 \uacf5\uc2e0\ub825 \uc788\ub294 \uc911\uc559 \uae30\uad00(Centralized authority)\uc774 \uac70\ub798 \uc815\ubcf4\ub97c \uc800\uc7a5\ud558\uace0 \uc774\ub97c \uac80\uc99d\ud558\ub294 \uc804\ub7b5\uc744 \ucde8\ud574\uc654\ub2e4. \ubc25\uc774 \ub9ac\uc0ac\uc5d0\uac8c 10$\uc744 \uc9c0\ubd88\ud558\uba74(\uac70\ub798\uac00 \uc774\ub8e8\uc5b4\uc9c0\uba74), \uc911\uc559 \uae30\uad00(\uc740\ud589)\uc740 \ubc25\uc758 \uacc4\uc88c\uc5d0\uc11c 10$\uc744 \ube7c\ub0b4\uace0 \ub9ac\uc0ac\uc758 \uacc4\uc88c\uc5d0 10$\uc744 \ub354\ud558\uac8c \ub420 \uac83\uc774\uba70, \uadf8\ub807\uac8c \ud568\uc73c\ub85c\uc11c \ubc25\uc774 \ub610 \ub2e4\uc2dc 10$\uc744 \uc190\ud574\ubcf4\uc9c0 \uc54a\uace0 \uc774\uc911 \uc9c0\ubd88\ud558\ub294 \ubb38\uc81c\uac00 \ud574\uacb0\ub418\ub294 \uac83\uc774\ub2e4. \uadf8\ub7f0\ub370 \uc774 \uc911\uc559 \ub2f9\uad6d\uc758 \uc6b4\uc601\uc5d0\ub294 \ub3c8\uc774 \ud544\uc694\ud558\ubbc0\ub85c, \uc77c\ubc18\uc801\uc73c\ub85c \uae30\uc874 \uc628\ub77c\uc778 \uacbd\uc81c \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc740\ud589\uc740 \uac70\ub798\uc5d0 \uc218\uc218\ub8cc\ub97c \ubd80\uacfc\ud558\uc5ec \uc774\ub97c \ud574\uacb0\ud558\ub294\ub370, \uc544\uae5d\ub2e4.<br>\uc774 \ubb38\uc81c\ub97c \ube44\ud2b8\ucf54\uc778\uc774\ub77c\ub294 \ube14\ub85d\uccb4\uc778\uc5d0 \uae30\ubc18\uc744 \ub454 \uc2e0\ud654\ud3d0\uac00 \ud574\uacb0\ud558\ub824\uace0 \ub2ec\ub824\ub4e0 \uac83\uc774\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"bitcoin\"><span class=\"ez-toc-section\" id=\"Bitcoin\"><\/span>Bitcoin<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"> \ube44\ud2b8\ucf54\uc778\uc740 2008\ub144\uc5d0 Satoshi Nakamoto\uc5d0 \uc758\ud574 \ucc98\uc74c \uc81c\uc2dc\ub41c \uac1c\ub150\uc774\ub2e4. \ube44\ud2b8\ucf54\uc778\uc740 \uc774\uc911 \uc9c0\ubd88\uc758 \ubb38\uc81c\ub97c \ud574\uacb0\ud588\uc744 \ubfd0\ub9cc\uc774 \uc544\ub2c8\ub77c, \uac70\ub798\uc758 \uc775\uba85\uc131\ub3c4 \ubcf4\uc7a5\ud558\ub294 \ub4f1 \ucd94\uac00\uc801\uc778 \uc7a5\uc810\uae4c\uc9c0 \uac00\uc9c4\ub2e4.<br>\ube44\ud2b8\ucf54\uc778\uc740 \uacb0\uad6d \uae30\uc874 \uacbd\uc81c \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc740\ud589\uc5d0 \uc758\ud574 \uc800\uc7a5\ub418\uace0 \uad00\ub9ac\ub418\uc5c8\ub358 \uac70\ub798 \uae30\ub85d\uc744 \ub300\uc911\ud654\ud558\uc790\ub294 \uc544\uc774\ub514\uc5b4\uc5d0\uc11c \ucd9c\ubc1c\ud588\ub2e4. \ub2e4\ub9cc, \ub300\uc911\uc131\uc5d0\uc11c \ube44\ucd94\uc5b4\uc9c0\ub294 \uc6b0\ub824\ub97c \uace0\ub824\ud560 \ub54c, \uac70\ub798 \uae30\ub85d\uc740 \ubcf4\ub418 \uadf8 \uac70\ub798 \uae30\ub85d\uc744 \ub204\uad6c\ub3c4 \uc218\uc815\ud560 \uc218 \uc5c6\uc5b4\uc57c \ud55c\ub2e4. \uac8c\ub2e4\uac00, \ub9cc\uc77c \uc774 \uac70\ub798 \uae30\ub85d\uc758 \uc591\uc774 \uc5b4\ub9c8\uc5b4\ub9c8\ud558\ub2e4\ub294 \uc810\uc744 \uace0\ub824\ud560 \ub54c \uc774\ub4e4 \ub370\uc774\ud130\ub97c \ubd84\uc0b0\ud558\ub294 \uac83\ub3c4 \uc0c1\ub2f9\ud788 \uc911\uc694\ud558\ub2e4\uace0 \ud560 \uac83\uc774\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"pkipublic-key-cryptography\"><span class=\"ez-toc-section\" id=\"PKIPublic_Key_Cryptography\"><\/span>PKI(Public Key Cryptography)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"> <a href=\"https:\/\/crazia.tistory.com\/entry\/PKI-PKI-%EC%9D%98-%EA%B8%B0%EB%B3%B8-%EA%B0%9C%EB%85%90-%EA%B0%84%EB%8B%A8-%EC%84%A4%EB%AA%85\">\uc774 \ubd80\ubd84\uc740 \ud2b9\ubcc4\ud788 Tutorialspoint\ubcf4\ub2e4 \uc815\ub9ac\uac00 \ub354 \uc798\ub41c \uc774 \ube14\ub85c\uadf8\ub97c \ucc38\uace0\ud558\uc600\uc74c.<\/a><\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"enctyption-decryption\"><span class=\"ez-toc-section\" id=\"Enctyption_Decryption\"><\/span>Enctyption, Decryption<span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"> \ud3c9\ubb38\uc5d0 \ubb34\uc5c7\uc778\uac00 \ubcc0\uacbd\uc744 \uac00\ud558\ub294 \uac83\uc744 Encryption\uc774\ub77c \ud558\uace0, \ubcc0\uacbd\ub41c \uac83\uc744 \ub2e4\uc2dc \uc6d0 \uc0c1\ud0dc\ub85c \ub418\ub3cc\ub9ac\ub294 \uac83\uc744 Decryption\uc774\ub77c\uace0 \uc774\ud574\ud558\uba74 \ub41c\ub2e4.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"symmetric-key-algorithm\ub300\uce6d-\ud0a4-\uc54c\uace0\ub9ac\uc998\"><span class=\"ez-toc-section\" id=\"Symmetric_Key_Algorithm%EB%8C%80%EC%B9%AD_%ED%82%A4_%EC%95%8C%EA%B3%A0%EB%A6%AC%EC%A6%98\"><\/span>Symmetric Key Algorithm(\ub300\uce6d \ud0a4 \uc54c\uace0\ub9ac\uc998)<span class=\"ez-toc-section-end\"><\/span><\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"> \ub300\uce6d \ud0a4 \uc54c\uace0\ub9ac\uc998\uc5d0\uc11c\ub294 \ud3c9\ubb38\uc744 \uc554\ud638\ud654\ud558\ub294 \ud0a4\uc640 \ubcf5\ud638\ud654\ud558\ub294 \ud0a4\uac00 \uac19\ub2e4. 3DES\ub098 AES\uac00 \ub300\ud45c\uc801\uc778 \uc54c\uace0\ub9ac\uc998\uc774\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/t1.daumcdn.net\/cfile\/tistory\/2047EF47516B5AC92A\" alt=\"\ub300\uce6d \ud0a4 \uc54c\uace0\ub9ac\uc998\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uadf8\ub9bc\uc5d0\uc11c \uc2f8\uc774\ud37c \ud14d\uc2a4\ud2b8(Cipher Text)\ub294 \ubcc0\uc870\ub41c \ubb38\uc11c\ub85c, \ub0b4\uc6a9\uc744 \uc54c\uc544\ubcfc \uc218 \uc5c6\ub294 \uc554\ud638\ubb38\uc774\ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"asymmetric-key-algorithm\ube44\ub300\uce6d-\ud0a4-\uc54c\uace0\ub9ac\uc998\"><span class=\"ez-toc-section\" id=\"Asymmetric_Key_Algorithm%EB%B9%84%EB%8C%80%EC%B9%AD_%ED%82%A4_%EC%95%8C%EA%B3%A0%EB%A6%AC%EC%A6%98\"><\/span>Asymmetric Key Algorithm(\ube44\ub300\uce6d \ud0a4 \uc54c\uace0\ub9ac\uc998)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"> \ube44\ub300\uce6d \ud0a4 \uc54c\uace0\ub9ac\uc998\uc5d0\uc11c\ub294 \uac1c\uc778\ud0a4(Private Key)\uc640 \uacf5\uac1c\ud0a4(Public Key)\uc758 \ub450 \uac1c\uc758 \ud0a4\ub97c \uc774\uc6a9\ud55c\ub2e4. \ub450 \uac1c\uc758 \ud0a4\ub97c \uc4f0\uae30 \ub54c\ubb38\uc5d0 \u2018\ub300\uce6d\ud0a4 \uc54c\uace0\ub9ac\uc998\uc774 \uc544\ub2c8\ub2e4\u2019\ub77c\ub294 \uc758\ubbf8\uc5d0\uc11c, \ube44\ub300\uce6d\ud0a4 \uc54c\uace0\ub9ac\uc998\uc774\ub77c\uace0 \ud55c\ub2e4. \ube44\ub300\uce6d\ud0a4 \uc54c\uace0\ub9ac\uc998\uc5d0\uc11c\ub294 Encryption\uacfc Decryption\uc5d0 \uc11c\ub85c \ub2e4\ub978 \ud0a4\ub97c \uc0ac\uc6a9\ud558\uba70, \ub300\ud45c\uc801\uc778 \uc54c\uace0\ub9ac\uc998\uc73c\ub85c\ub294 RSA\uac00 \uc788\ub2e4. RSA\ub294 \uc18c\uc218\ub97c \uc774\uc6a9\ud55c\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/t1.daumcdn.net\/cfile\/tistory\/2614AE4D516B60E114\" alt=\"\ube44\ub300\uce6d\ud0a4 \uc54c\uace0\ub9ac\uc998 \uc554\ud638\ud654\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uadf8\ub9bc\uc5d0\uc11c \ubcf4\ub4ef\uc774, \uacf5\uac1c\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c Encryption\uc744 \ud55c\ub2e4\uba74 Decryption\uc744 \ud558\uae30 \uc704\ud574\uc11c\ub294 \ubc18\ub4dc\uc2dc \uac1c\uc778 \ud0a4\ub97c \uc774\uc6a9\ud574\uc57c \ud55c\ub2e4. \uc989, \uc554\ud638\ud654\uc640 \ubcf5\ud638\ud654\ub294 \ud56d\uc0c1 \uc0c1\ubc18\ub418\ub294 \ud0a4\ub97c \uc0ac\uc6a9\ud558\uac8c \ub418\ub294 \uac83\uc774\ub2e4. \uc704 \uadf8\ub9bc\ucc98\ub7fc \ud1b5\uc0c1 \uacf5\uac1c\ud0a4\ub97c \uac00\uc9c0\uace0 Encripytion\uc744 \ud558\ub294 \uacbd\uc6b0\ub294 \uc6d0\ud558\ub294 \ud1b5\uc2e0 \uc0c1\ub300\ub9cc\uc774 \ud480\uae30\ub97c \ubc14\ub77c\uae30 \ub54c\ubb38\uc5d0 \uba54\uc138\uc9c0 \uc554\ud638\ud654\uc5d0 \uc0ac\uc6a9\ub41c\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/t1.daumcdn.net\/cfile\/tistory\/200E2E34516B62981A\" alt=\"\ube44\ub300\uce6d\ud0a4 \uc54c\uace0\ub9ac\uc998 \uc804\uc790\uc11c\uba85\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc774\ucc98\ub7fc \uac1c\uc778\ud0a4\ub97c \uac00\uc9c0\uace0 Encryption \ud558\ub294 \uacbd\uc6b0, \uc30d\uc774 \ub418\ub294 \uacf5\uac1c\ud0a4\ub85c \ud480\uc5b4\uc11c \uc774 \uba54\uc138\uc9c0\uc758 \ucd9c\ucc98\ub97c \uac80\uc99d\ud560 \uc218 \uc788\ub2e4. \uc989, \uc774\ub7ec\ud55c \ucf00\uc774\uc2a4\ub294 \uac1c\uc778\uc774 \ubcf4\ub0b8 \ub0b4\uc6a9\uc744 \uc99d\uba85\ud560 \ub54c \uc0ac\uc6a9 \uac00\ub2a5\ud558\ub2e4. \uc774\ub7ec\ud55c \uacbd\uc6b0\ub97c \ubcf4\ud1b5 \uac1c\uc778\ud0a4 \u2018\uc804\uc790\uc11c\uba85\u2019, \uacf5\uac1c\ud0a4 \u2018\uc11c\uba85\uac80\uc99d\u2019\uc774\ub77c \ubd80\ub978\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"public-key--private-key\"><span class=\"ez-toc-section\" id=\"Public_Key_Private_Key\"><\/span>Public Key &amp; Private Key<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"> \uac1c\uc778\ud0a4\ub294 \uac1c\uc778 \ud63c\uc790 \ub9cc\uc774 \uac00\uc9c0\uace0 \uc788\ub294 \ud0a4\ub85c, \ub204\uad6c\uc5d0\uac8c\ub3c4 \uacf5\uc720\ud558\uc9c0 \uc54a\uace0 \uc790\uae30 \uc790\uc2e0\ub9cc \uac00\uc9c0\ub294 \ud0a4\uc774\ub2e4. \uacf5\uac1c\ud0a4\ub294 \uacf5\uac1c\uc801\uc73c\ub85c \uacf5\uac1c\uac00 \ub418\uc5b4 \uc788\ub294 \ud0a4\uc774\uba70, \ub204\uad6c\ub098 \uc774 \uacf5\uac1c\ud0a4\ub97c \uc5bb\uc744 \uc218 \uc788\ub2e4.<br>\uc774\uc640 \uac19\uc740 \uac00\uc815 \ud558\uc5d0\uc11c, A\ub77c\ub294 \uc0ac\ub78c\ub9cc \ud480\uc5b4\ubcfc \uc218 \uc788\ub294 \ub0b4\uc6a9\uc744 \uc804\ub2ec\ud558\uace0 \uc2f6\uc73c\uba74, \ub9cc\ucc9c\ud558\uc5d0 \uacf5\uac1c\ub418\uc5b4 \uc788\ub294 \uacf5\uac1c\ud0a4\ub85c \uc778\ud06c\ub9bd\uc158\ub9cc \ud55c\ub2e4\uba74, \uadf8 \ub2f9\uc0ac\uc790\uac00 \ud480\uc5b4\ubcfc \uc218 \uc788\ub2e4. \ub610 A\ub77c\ub294 \uc0ac\ub78c\uc774 \uc5b4\ub5a4 \ubb38\uc11c\ub97c \ubcf4\ub0c8\ub2e4\ub294 \uac83\uc744 \ud655\uc778\ud558\uace0 \uc2f6\uc73c\uba74, A\uc758 \uac1c\uc778\ud0a4\ub85c \uc778\ud06c\ub9bd\uc158 \ud55c \ub0b4\uc6a9\uc744 \ucd94\uac00\ud558\uba74 \ub41c\ub2e4. \uadf8\ub7ec\uba74 \uacf5\uac1c\ud0a4\ub85c \ub514\ud06c\ub9bd\uc158\ud574\uc11c A\uac00 \ubcf4\ub0c8\ub294\uc9c0\uc758 \uc5ec\ubd80\ub97c \uc99d\uba85\ud560 \uc218 \uc788\ub2e4.<br>\uc774 \ub450 \uac00\uc9c0\uac00 \ubc14\ub85c \uacf5\uac1c\ud0a4 \uc554\ud638\uc640\uc640 \uc804\uc790\uc11c\uba85\uc758 \uc6d0\ub9ac\uc774\uace0, \uc774 \uae30\ubc18\uc744 \ub9c8\ub828\ud574 \ub454 \uac83\uc774 PKI\uc774\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"in-real-world\"><span class=\"ez-toc-section\" id=\"In_Real_World\"><\/span>In Real World<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/t1.daumcdn.net\/cfile\/tistory\/262CAB4B516B94531D\" alt=\"\uacf5\uac1c\ud0a4 \uc554\ud638\ud654\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ud3ec\ub9f7\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uacf5\uac1c\ud0a4 \uc554\ud638\ud654\uc5d0 \uc4f0\uc774\ub294 \ud3ec\ub9f7\uc785\ub2c8\ub2e4. \ubb3c\ub860 \uc774\ubcf4\ub2e4 \ub354 \uc790\uc138\ud788 \ub4e4\uc5b4\uac00\uba74 \ub354 \ubcf5\uc7a1\ud574\uc9c0\uc9c0\ub9cc, \uc77c\ub2e8 \uc774\uc815\ub3c4\ub85c \uac1c\ub150\uc744 \uc54c\uace0 \uc788\uc5b4\ub3c4 \ucda9\ubd84\ud560 \uac83\uc785\ub2c8\ub2e4. \uc55e\uc5d0\uc11c \uc124\uba85\ud588\ub4ef\uc774 \uacf5\uac1c\ud0a4 \uc554\ud638\ud654\uc758 \ud575\uc2ec\uc740 \ubc1b\uc744 \ub2f9\uc0ac\uc790\ub9cc \ud480\uc5b4\ubcfc \uc218 \uc788\uac8c \ub2f9\uc0ac\uc790\uc758 \uacf5\uac1c\ud0a4\ub85c \ub0b4\uc6a9\uc744 \uc778\ud06c\ub9bd\uc158 (Encryption) \ud558\ub294 \uac83\uc774 \ubaa9\uc801\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uadf8\ub7f0\ub370 \uc704\uc758 \uadf8\ub9bc\uc744 \ubcf4\uba74 \uc784\uc2dc \ub300\uce6d\ud0a4\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc774 \uc774\uc720\uac00 \ubc14\ub85c \uc18d\ub3c4 \ucc28\uc774\uc785\ub2c8\ub2e4. \ud3c9\ubb38 (Plain Text) \uac00 \ub9cc\uc57d \ud06c\uae30\uac00 \ub9ce\uc774 \ud06c\ub2e4\uba74 \uc774\ub97c \uacf5\uac1c\ud0a4\ub97c \uc774\uc6a9\ud574\uc11c Encrypt \ud558\ub294\ub370 \uc2dc\uac04\uc774 \ub9ce\uc774 \uac78\ub9bd\ub2c8\ub2e4. \uadf8\ub798\uc11c \uc784\uc2dc \ub300\uce6d\ud0a4\ub97c \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ud558\uace0 \uc774 \ub300\uce6d\ud0a4\ub85c \ud3c9\ubb38 (Plain Text)\uc744 Encrypt \ud574\uc11c \uc2f8\uc774\ud37c \ubb38(Cipher Text)\ub85c \ubcc0\uacbd\ud569\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uadf8 \uc0dd\uc131\ud55c \ub300\uce6d\ud0a4\ub97c \uba54\uc2dc\uc9c0\ub97c \ubc1b\uc744 A\uc758 \uacf5\uac1c\ud0a4(Public Key)\ub85c Encrypt \ud569\ub2c8\ub2e4. (\uc774 Encrypt \ub41c \uc784\uc2dc \ub300\uce6d\ud0a4\ub97c \ud480 \uc218 \uc788\ub294 \uc0ac\ub78c\uc740 \uc138\uc0c1\uc5d0 A \ubcf8\uc778 \ubc16\uc5d0 \uc5c6\uc2b5\ub2c8\ub2e4) \uadf8\ub798\uc11c \u2018Cipher Text\u2019 \uc640 A\uc758 \uacf5\uac1c\ud0a4\ub85c Encrypt \ud55c \u2018Encrypted Key\u2019 \ub97c \ud55c\uaebc\ubc88\uc5d0 A\uc5d0\uac8c \ubcf4\ub0b4\uba74 A\ub294 \u2018Encrypted Key\u2019\ub97c \uc790\uc2e0\uc758 \uac1c\uc778\ud0a4 (Private Key) \ub85c Decrypt \ud574\uc11c \uc784\uc2dc \ub300\uce6d\ud0a4\ub97c \uc5bb\uc5b4\ub0b4\uace0 \uadf8 \uc784\uc2dc \ub300\uce6d\ud0a4\ub85c \ub2e4\uc2dc Cipher Text \ub97c Decrypt \ud569\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \ud3c9\ubb38(Plain Text)\ub97c \uc5bb\uc5b4\ub0bc \uc218 \uc788\ub294 \uac83\uc774\uc9c0\uc694.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/t1.daumcdn.net\/cfile\/tistory\/1568E53E516B991024\" alt=\"\uc804\uc790\uc11c\uba85\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ud3ec\ub9f7\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc804\uc790\uc11c\uba85 \ud504\ub85c\uc138\uc2a4\uc758 \uac04\ub2e8\ud55c \uc124\uba85\uc785\ub2c8\ub2e4. \uc804\uc790\uc11c\uba85\uc740 \ubcf4\ub0b8 \ub2f9\uc0ac\uc790\uac00 \ubcf4\ub0c8\ub2e4\ub294 \uac83\uc744 \ud655\uc778\ud558\ub294 \uc808\ucc28\uc785\ub2c8\ub2e4. \uc989 \ud3c9\ubb38 (Plain Text) \uc790\uccb4\ub97c Encrypt \ud560 \ud544\uc694\uac00 \uc5c6\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c \ud3c9\ubb38(Plain Text)\ub97c \uc554\ud638\ud654 \ud574\uc26c \ud568\uc218 (Cryptographic Hash Function) \ub85c \ucd95\uc57d\uc744 \ud558\uace0 \uadf8 \ucd95\uc57d\ub41c \uacb0\uacfc\ub97c \uac1c\uc778\ud0a4(Private Key)\ub85c Encrypt \ud569\ub2c8\ub2e4. \uc774 \uac83\uc744 Signature \ub77c\uace0 \ud3b8\uc758\uc0c1 \ubd80\ub974\uae30\ub85c \ud569\ub2c8\ub2e4. (16 \ubc14\uc774\ud2b8 \uc544\ub2c8\uba74 20\ubc14\uc774\ud2b8\ub97c Encrypt \ud558\uae30 \ub54c\ubb38\uc5d0 \uc18d\ub3c4\uac00 \ube60\ub985\ub2c8\ub2e4) \uc774 Encrypt \ud55c \uacb0\uacfc\uc640 \ud3c9\ubb38(Plain Text)\uc744 \ud568\uaed8 \ubc1b\uc744 \uc0ac\ub78c\uc5d0\uac8c \ubcf4\ub0c5\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \uba54\uc2dc\uc9c0\ub97c \ubc1b\ub294 \uc0ac\ub78c\uc740 \ubcf4\ub0b8 \uc0ac\ub78c\uc758 \uacf5\uac1c\ud0a4(Public Key)\ub97c \uad6c\ud574\uc11c (\uacf5\uac1c\ud0a4 \uc774\uae30 \ub54c\ubb38\uc5d0 \uc27d\uac8c \uad6c\ud560 \uc218\uac00 \uc788\uc2b5\ub2c8\ub2e4) Signature \ub97c Decrypt \ud569\ub2c8\ub2e4. \uadf8\ub7ec\uba74 \ucd95\uc57d\ub41c \uacb0\uacfc\uac00 \ub098\uc624\uba74 \uac19\uc774 \ub4e4\uc5b4 \uc788\ub294 \ud3c9\ubb38 (Plain Text) \uc744 \uc554\ud638\ud654 \ud574\uc26c \ud568\uc218\ub85c \ucd95\uc57d\uc744 \ud558\uace0 \uadf8 \uacb0\uacfc\ub97c \uc55e\uc5d0\uc11c Signature \ub97c Decrypt \ud55c \uacb0\uacfc\uc640 \ube44\uad50\ud569\ub2c8\ub2e4. \uac19\ub2e4\uba74 A \uac00 \ubcf4\ub0b8 \ubb38\uc11c\uc784\uc744 \ud655\uc2e0\ud560 \uc218\uac00 \uc788\ub294 \uac83\uc785\ub2c8\ub2e4. \ub9d0 \uadf8\ub300\ub85c \uc11c\uba85\uc744 \ud655\uc778 \ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"hashing\"><span class=\"ez-toc-section\" id=\"Hashing\"><\/span>Hashing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"> PKI\uc5d0\uc11c \ud575\uc2ec\uc774 \ub418\ub294 \uac83 \uc911 \ud558\ub098\ub294 \ud574\uc26c \ud568\uc218\uc774\ub2e4. \ud574\uc26c\ud568\uc218\ub294 \uc5b4\ub5a4 \uac00\ubcc0\uc801 \ud06c\uae30\uc758 \ub370\uc774\ud130\ub97c \uace0\uc815\ub41c \uc0ac\uc774\uc988\ub85c \ub9e4\ud551\ud558\ub294 \ud568\uc218\uc774\ub2e4. \ube44\ud2b8\ucf54\uc778\uc740 SHA-256 \ud574\uc2dc \ud568\uc218(256bits\uc758 \uacb0\uacfc\ub97c return\ud568)\ub97c \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.tutorialspoint.com\/blockchain\/images\/hashing.jpg\" alt=\"Hashing\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uc774 \ud574\uc26c \uac12\uc758 \ud2b9\uc9d5\uc740 \uc6d0\ubb38\uc774 \uc870\uae08\uc774\ub77c\ub3c4 \ubc14\ub014 \uacbd\uc6b0, \ud574\uc26c\uac12\ub3c4 \ubcc0\ub3d9\ud558\uae30 \ub54c\ubb38\uc5d0, \uc9e7\uc740 \uae38\uc774\uc758 \ub370\uc774\ud130\ub9cc\uc73c\ub85c \uae34 \ub370\uc774\ud130\uc758 \ubcc0\ub3d9 \ucd94\uc801\uc774\ub098 \uc77c\uce58 \uac80\uc99d\uc5d0 \uc0c1\ub2f9\ud788 \uc720\uc6a9\ud558\ub2e4\ub294 \uac83\uc774\ub2e4. \uadf8\ub798\uc11c, \ud30c\uc77c \uac80\uc99d\uc5d0\uc11c\ub294 \ud30c\uc77c\uc758 \ud574\uc26c \uac12\uc774 \uac19\uace0 \ud06c\uae30\uac00 \uac19\ub2e4\uba74, \uac19\uc740 \ub370\uc774\ud130\ub77c\uace0 \ud310\ub2e8\ud558\ub294 \uac83\uc774 \uac00\ub2a5\ud55c \uac83\uc774\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"mining\"><span class=\"ez-toc-section\" id=\"Mining\"><\/span>Mining<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.tutorialspoint.com\/blockchain\/images\/mining.jpg\" alt=\"Mining 1\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \ube44\ud2b8\ucf54\uc778\uc5d0\uc11c \uac70\ub798 \uc815\ubcf4\ub294 \ub2e8\uc21c\ud788 \uac70\ub798 \uc591 \ub2f9\uc0ac\uc790 \uac04\uc5d0\uc11c\ub9cc \uacf5\uc720\ub418\uc9c0 \uc54a\uace0, \ub124\ud2b8\uc6cc\ud06c\uc5d0 \uc5f0\uacb0\ub41c \ubaa8\ub4e0 \ub178\ub4dc\uc5d0\uac8c \uc804\uc1a1\ub41c\ub2e4. \uc774 \uc911 \uba87\uba87 \ub178\ub4dc\uc5d0\ub294 Miner\uac00 \uc874\uc7ac\ud558\ub294\ub370, \uc774\ub4e4\uc740 Mining\uc744 \ud55c\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.tutorialspoint.com\/blockchain\/images\/mining_process.jpg\" alt=\"Mining 2\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> Mining\uc740 \uacf5\uc720\ub41c \uc5ec\ub7ec\uac00\uc9c0 \uac70\ub798 \uc815\ubcf4\ub4e4\uc744 \ud558\ub098\uc758 \ube14\ub85d\uc73c\ub85c \ub9cc\ub4dc\ub294 \uacfc\uc815\uc744 \ub9d0\ud55c\ub2e4. \uc704 \uadf8\ub9bc\ucc98\ub7fc \ub9d0\uc774\ub2e4. \uba54\uc138\uc9c0\ub4e4\uc758 \ube14\ub85d\uc774 \ub9cc\ub4e4\uc5b4\uc9c0\uba74, Miner\ub294 \ud574\uc26c \ud568\uc218\ub97c \uc774\uc6a9\ud558\uc5ec \ube14\ub85d\uc5d0 \ub300\ud55c \ud574\uc26c\ub97c \ub9cc\ub4e4\uace0, \uc774 \ud574\uc26c\uc640 \ube14\ub85d\uc758 \ube44\uad50\ub97c \ud1b5\ud558\uc5ec \ube14\ub85d\uc758 \uc911\uac04 \uc218\uc815 \uc5ec\ubd80\ub97c \uac80\uc99d \uac00\ub2a5\ud558\ub2e4. \ub9cc\uc57d \ube14\ub85d\uc774 \uc911\ub3c4\uc5d0 \uc218\uc815\ub41c\ub2e4\uba74 \ud574\uc26c\uac12\uc774 \ub9de\uc9c0 \uc54a\uc744 \ud14c\ub2c8\uae4c. \uac8c\ub2e4\uac00, \ubaa8\ub4e0 \uac70\ub798 \uc815\ubcf4\ub294 timestamp\uac00 \ucc0d\ud600 \uc788\uc5b4\uc11c \uadf8 \ub204\uad6c\ub3c4 \uac70\ub798 \uc21c\uc11c\ub97c \ud574\uc26c\uac12\uc744 \ubc14\uafb8\uc9c0 \uc54a\uace0 \ubc14\uafb8\ub294 \uac83\ub3c4 \ubd88\uac00\ub2a5\ud558\ub2e4. \uc774 \uacfc\uc815\uc73c\ub85c \ube44\ud2b8\ucf54\uc778\uc740 \uac70\ub798 \uc815\ubcf4\ub97c \ubcf4\ud638\ud55c\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <em>\uc9c8\ubb38: \uadf8\ub7fc \uc774 \ud574\uc26c\uac12\uc740 \uc5b4\ub5bb\uac8c \ubcf4\ud638\ud558\uc9c0? \ud574\uc26c\uac12\ub3c4 \uac19\uc774 steal \ub2f9\ud560 \uc218 \uc788\uc9c0 \uc54a\ub358\uac00\u2026?<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"chaining-blocks\"><span class=\"ez-toc-section\" id=\"Chaining_Blocks\"><\/span>Chaining Blocks<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"> \ube14\ub85d\uccb4\uc778\uc5d0\uc11c \ube14\ub85d\ub4e4\uc740 \ub2e4\uc591\ud55c Miner\ub4e4\uc5d0 \uc758\ud574\uc11c \uc5f0\uacb0\ub418\uc5b4, \uc644\uc804\ud788 \ubd84\ubc30\ub41c \uacf5\uc6a9 \uac70\ub798 \uc7a5\ubd80\ub97c \uad6c\uc131\ud55c\ub2e4.(truly distributed public ledger)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><img decoding=\"async\" src=\"https:\/\/www.tutorialspoint.com\/blockchain\/images\/chaining_blocks.jpg\" alt=\"Chaining Blocks\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \uccb4\uc778\uc5d0\uc11c \uac01\uac01\uc758 \ube14\ub85d\ub4e4\uc740 \uc55e\uc5d0\uc11c \uc5b8\uae09\ud55c \ub300\ub85c \uac70\ub798 \uc815\ubcf4 \uba54\uc138\uc9c0\ub4e4 \ubfd0\ub9cc\uc774 \uc544\ub2c8\ub77c, \uc5b4\ub5a4 \ub2e4\ub978 Miner\ub85c\ubd80\ud130 \ub9cc\ub4e4\uc5b4\uc9c4 \ube14\ub85d\uc758 \ud574\uc26c\uac12\ub3c4 \ud3ec\ud568\ud55c\ub2e4. \ub530\ub77c\uc11c, \uc911\ub3c4\uc758 \ube14\ub85d\uc5d0 \ub300\ud55c \uac80\uc99d\uc774 \ud6c4\uc758 \ube14\ub85d\ub4e4\uc744 \ud1b5\ud558\uc5ec \uac00\ub2a5\ud558\uac8c \ub41c\ub2e4. \uc911\ub3c4 \ube14\ub85d\uc758 \ud574\uc26c\uac00 \ub2e4\uc74c \ube14\ub85d\uc758 \ub370\uc774\ud130\ub85c \ubcf4\ud638\ub418\ub294 \uac83\uc774\ub2e4. \ub530\ub77c\uc11c, Miner\ub294 \ube14\ub85d\uc744 \ub9cc\ub4e4 \ub54c, \uccb4\uc778\uc5d0\uc11c \uac00\uc7a5 \ub9c8\uc9c0\ub9c9 \ube14\ub85d\uc758 \ud574\uc26c\ub97c \ucc3e\uc740 \ud6c4, \uc774\uac83\uacfc \uac70\ub798 \uc815\ubcf4\ub4e4\uc744 \ud3ec\ud568\ud55c \uc0c8\ub85c\uc6b4 \ube14\ub85d\uc744 \ub9cc\ub4e4\uace0 \uc774\uac83\uc758 \ud574\uc26c\ub97c \ub9cc\ub4e0\ub2e4. \uc774 \uc0c8\ub85c\uc6b4 \ube14\ub85d\uc774 \uccb4\uc778\uc740 \ub9e8 \ub9c8\uc9c0\ub9c9\uc5d0 \uc704\uce58\ud558\uac8c \ub418\uba70, \uccb4\uc778\uc774 \uacc4\uc18d \uc131\uc7a5\ud558\uac8c \ub41c\ub2e4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <em>End of Today\u2019s Note<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Blockchain #1 \uc624\ub298\ubd80\ud130 \ube14\ub85d\uccb4\uc778 \uacf5\ubd80\ub97c \uc2dc\uc791\ud558\uae30\ub85c \ud588\ub2e4. Tutorialspoint\uc5d0 \ub531 \uac15\uc758\uac00 \uc788\uae38\ub798 \ud765\ubbf8\uac00 \uc0dd\uaca8\uc11c \ubc30\uc6b0\uae30\ub85c \uacb0\uc815. \uc5ec\uae30\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\ub2e4. \ud574\uc2dc(Hash) \ud574\uc2dc \ud568\uc218\ub294 \uc784\uc758\uc758 \uae38\uc774\ub97c \uac16\ub294 \uc784\uc758\uc758 \ub370\uc774\ud130\uc5d0 \ub300\ud558\uc5ec \uace0\uc815\ub41c \uae38\uc774\uc758 \ub370\uc774\ud130\ub85c \ub9e4\ud551\ud558\ub294 \ud568\uc218\ub97c \ub9d0\ud55c\ub2e4. \uc774\ub7ec\ud55c \ud574\uc2dc \ud568\uc218\ub97c \uc801\uc6a9\ud558\uc5ec \ub098\uc628 \uace0\uc815\ub41c \uae38\uc774\uc758 \uac12\uc744&nbsp;\ud574\uc2dc\uac12, \ub610\ub294 \ud574\uc2dc \ucf54\ub4dc, \ud574\uc2dc\uc12c(hash sum) \ub4f1\uc73c\ub85c\ub3c4 \ubd88\ub9b0\ub2e4. <a class=\"read-more\" href=\"https:\/\/stevenoh0908.pe.kr\/blog\/knowledges\/blockchain-%ea%b3%b5%eb%b6%80-%eb%85%b8%ed%8a%b8-1\/\">[&#8230;]<\/a><\/p>\n","protected":false},"author":18,"featured_media":490,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0","_share_on_mastodon_status":"%title%\r\n\r\n%excerpt%\r\n\r\n%permalink%"},"categories":[4],"tags":[],"series":[6],"class_list":["post-78","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledges","series-6"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\uce74\ud398\uc9c0\uae30 &#039;\ucc45\ubc8c\ub808&#039;\uc758 Blockchain \uacf5\ubd80 \ub178\ud2b8 #1.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"\ucee4\ud53c\uc0ac\uc720\"\/>\n\t<meta name=\"keywords\" content=\"knowledges\" 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