{"id":18761,"date":"2018-07-02T12:53:48","date_gmt":"2018-07-02T12:53:48","guid":{"rendered":"https:\/\/www.blockchaincaffe.org\/?p=18761"},"modified":"2018-07-02T12:53:48","modified_gmt":"2018-07-02T12:53:48","slug":"bitcoin-blockchain-pojednostavljen","status":"publish","type":"post","link":"https:\/\/www.blockchaincaffe.org\/?p=18761&lang=sr","title":{"rendered":"Bitcoin blockchain pojednostavljen"},"content":{"rendered":"

Ve\u0107 smo u prvom textu napomenuli da je blockchain baza podataka,a da je bitcoin njen jedini podatak.<\/p>\n

Niko ne mo\u017ee da izbri\u0161e zapis unutar blockchain baze podataka.\u0160to znaci da niko ne mo\u017ee da vam izbri\u0161e Bitcoin,\u0161to je odgovor na pitanje mo\u017ee li bitcoin prosto da nestane?-Ne.<\/p>\n

Mo\u017ee li neko da vam ukrade Bitcoin?Odgovor je:Da.<\/p>\n

On vam ustvari mo\u017ee ukrasti \u0161ifru za pristup va\u0161em bitcoinu.Ali ako \u0161ifru(kljuc) dobro \u010duvate ne postoji opasnost.<\/p>\n

Blockchain kao baza podataka se svakih 10 minuta uve\u0107ava za 1MB*.Kao \u0161to samo ime ka\u017ee blockchain je gra\u0111en od blokova,a ti blokovi su nove informacije.<\/p>\n

Zna\u010di ne postoji mogu\u0107nost promjene informacije u ve\u0107 nastalim blokovima ve\u0107 samo kad se dodaju novi blokovi.<\/p>\n

Dodavanjem novih blokova blockchain baza podataka raste svaki dan po malo.
\n\"\"
\nUve\u0107anje baze podataka je isprogramirano unaprijed I u nju se upisuju bitcoini koji mijenjaju vlasnika i nastaje novih 12.5** bitcoina koji se pu\u0161taju u cirkulaciju unutar blockchaina.<\/p>\n

To upisivanje novog podatka od 1MB* vr\u0161e rudari i oni postaju vlasnici tih novostvorenih bitcoina kao nagrada za trud i rad.<\/p>\n

Za sad treba da znate da rudari mogu samo da upisuju nove podatke po nalogu korisnika a niko i ni\u0161ta ne mo\u017ee da bri\u0161e podatke.<\/p>\n

Blockchainu, odnosno bazi podataka bitcoina mo\u017eete pristupiti sa razli\u010ditih ure\u0111aja Android,Iphone,Pc,Web…Ono \u0161to vidite da pi\u0161e na ekranu tog uredaja je zapravo pro\u010ditan podatak iz baze podataka-iz blockchaina.<\/p>\n

I Facebook i Gmail i Instagram i youtube su baza podataka i njoj mo\u017eete pristupiti sa razlicitih uredaja ali vam treba ogovaraju\u0107i softver.<\/p>\n

Tako i kod Bitcoin blockchain tehnologije treba vam softwer kojim pristupate bazi i on se zove nov\u010danik.<\/p>\n

Iz svega navedenog dolazimo do osnovne razlike izme\u0111u centralizovanih i decentralizovanih sistema.<\/p>\n

Jasno je da su Google,Facebook,Youtube,Instagram ,Twiter i Banke centralizovani sistemi \u010diji je vlasnik poznat.Taj vlasnik u svakom momentu mo\u017ee da vas izbri\u0161e,zabrani,promijeni i to je najve\u0107i problem.<\/p>\n

Taj vlasnik mo\u017ee na primjer sutra da odlu\u010di da postane kriminalac ili ga ucijene i narede mu da izbri\u0161e ili prepravi sve podatke.<\/p>\n

Svi smo godinama razvijali te podatke a neko ima mo\u0107 da ih jednim potezom izbri\u0161e i nema nikakvu obavezu prema nama.<\/p>\n

Jasno je da na takvim sistemima nije mogu\u0107e razvijati ozbiljne sisteme za razmjenu vrijednosti.<\/p>\n

U Blockchain tehnologiji ne postoji 1 vlasnik koji mo\u017ee upravljati svim podatcima unutar baze.Vec svaki vasnik bitcoina upravlja samo svojim bitcoinom.<\/p>\n

Svako mo\u017ee da po\u010dne da koristi bitcoin bazu podataka i mo\u017ee da bude majner,ako zna i \u017eeli.<\/p>\n

To se naziva decentralizacija,odnosno otsustvo centralnog autoriteta.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ve\u0107 smo u prvom textu napomenuli da je blockchain baza podataka,a da je bitcoin njen jedini podatak. Niko ne mo\u017ee da izbri\u0161e zapis unutar blockchain baze podataka.\u0160to znaci da niko ne mo\u017ee da vam izbri\u0161e Bitcoin,\u0161to je odgovor na pitanje mo\u017ee li bitcoin prosto da nestane?-Ne. Mo\u017ee li neko da vam ukrade Bitcoin?Odgovor je:Da. On […]<\/p>\n","protected":false},"author":1,"featured_media":19147,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[5],"tags":[11],"class_list":["post-18761","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pocetno-sr","tag-post-sr"],"_links":{"self":[{"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=\/wp\/v2\/posts\/18761","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18761"}],"version-history":[{"count":0,"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=\/wp\/v2\/posts\/18761\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=\/wp\/v2\/media\/19147"}],"wp:attachment":[{"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.blockchaincaffe.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}