[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.ivao.sk\/blockchainove-schemy-nie-su-az-take-skvele\/#Article","mainEntityOfPage":"https:\/\/www.ivao.sk\/blockchainove-schemy-nie-su-az-take-skvele\/","headline":"Blockchainov\u00e9 sch\u00e9my nie s\u00fa a\u017e tak\u00e9 skvel\u00e9","name":"Blockchainov\u00e9 sch\u00e9my nie s\u00fa a\u017e tak\u00e9 skvel\u00e9","description":"Podobne ako vysokofrekven\u010dn\u00ed obchodn\u00edci na Wall Street, aj rast\u00faca arm\u00e1da botov vyu\u017e\u00edva neefekt\u00edvnos\u0165 v decentralizovan\u00fdch burz\u00e1ch, \u010do s\u00fa miesta, kde u\u017e\u00edvatelia nakupuj\u00fa, pred\u00e1vaj\u00fa alebo obchoduj\u00fa s krypto-menou nez\u00e1visle od \u00fastredn\u00e9ho org\u00e1nu. V\u00fdskumn\u00edci tie\u017e zistili, \u017ee vysok\u00e9 poplatky zaplaten\u00e9 za prioritu ur\u010dit\u00fdch transakci\u00ed predstavuj\u00fa bezpe\u010dnostn\u00fa hrozbu pre cel\u00fd blok. \u00a0 Tieto praktiky umo\u017e\u0148uj\u00fa drav\u00fdm u\u017e\u00edvate\u013eom predv\u00edda\u0165&hellip; <div class=\"readmore-wrapper\"><a href=\"https:\/\/www.ivao.sk\/blockchainove-schemy-nie-su-az-take-skvele\/\" class=\"more-link\">Read More<\/a><\/div>","datePublished":"2019-05-25","dateModified":"2019-05-25","author":{"@type":"Person","@id":"https:\/\/www.ivao.sk\/author\/#Person","name":"","url":"https:\/\/www.ivao.sk\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/69bd9b72104e3ccfb6214cbd23cb226f96c6ecf33a2a351fa1d4682235118df3?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/69bd9b72104e3ccfb6214cbd23cb226f96c6ecf33a2a351fa1d4682235118df3?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"ivao.sk","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.ivao.sk\/wp-content\/uploads\/img_a301798_w16561_t1559222428.png","url":"https:\/\/www.ivao.sk\/wp-content\/uploads\/img_a301798_w16561_t1559222428.png","height":0,"width":0},"url":"https:\/\/www.ivao.sk\/blockchainove-schemy-nie-su-az-take-skvele\/","wordCount":320,"articleBody":"Podobne ako vysokofrekven\u010dn\u00ed obchodn\u00edci na Wall Street, aj rast\u00faca arm\u00e1da botov vyu\u017e\u00edva neefekt\u00edvnos\u0165 v decentralizovan\u00fdch burz\u00e1ch, \u010do s\u00fa miesta, kde u\u017e\u00edvatelia nakupuj\u00fa, pred\u00e1vaj\u00fa alebo obchoduj\u00fa s krypto-menou nez\u00e1visle od \u00fastredn\u00e9ho org\u00e1nu. V\u00fdskumn\u00edci tie\u017e zistili, \u017ee vysok\u00e9 poplatky zaplaten\u00e9 za prioritu ur\u010dit\u00fdch transakci\u00ed predstavuj\u00fa bezpe\u010dnostn\u00fa hrozbu pre cel\u00fd blok.\u00a0Tieto praktiky umo\u017e\u0148uj\u00fa drav\u00fdm u\u017e\u00edvate\u013eom predv\u00edda\u0165 a profitova\u0165 z ka\u017edodenn\u00fdch obchodov, sif\u00f3novan\u00edm mili\u00f3nov alebo pr\u00edpadne mili\u00e1rd dol\u00e1rov ro\u010dne.\u00a0\u201eV tradi\u010dnom syst\u00e9me m\u00e1te makl\u00e9ra alebo niekoho, s k\u00fdm obchodujete, a vy im d\u00f4verujete, alebo ste od nich z\u00e1konne povinn\u00ed urobi\u0165 spr\u00e1vnu vec,\u201c povedal Philip Daian, doktorand z Cornell Tech v oblasti informatiky a prv\u00fd autor &#8222;Flash Boys 2.0: Frontrunning, Transaction Reordering a nestabilita konsenzu v decentralizovan\u00fdch v\u00fdmen\u00e1ch.\u00a0&#8222;V t\u00fdchto syst\u00e9moch je broker nahraden\u00fd blockchainom, ktor\u00fd sa jav\u00ed ako d\u00f4veryhodn\u00e1 tretia strana, ale v skuto\u010dnosti existuje ve\u013ea r\u00f4znych pohybliv\u00fdch \u010dast\u00ed v blockchaine, s ktor\u00fdmi sa d\u00e1 manipulova\u0165,&#8220; povedal. &#8222;Tak\u017ee mus\u00ed\u0161 by\u0165 ve\u013emi opatrn\u00fd, \u010do ti vlastne d\u00e1va blockchain.&#8220;\u00a0Na vykonanie \u0161t\u00fadie osem\u010dlenn\u00fd t\u00edm veden\u00fd Ari Juelsom, profesorom informatiky na in\u0161tit\u00fate Jacobs Technion-Cornell v Cornell Tech a vy\u0161\u0161\u00edm autorom tohto \u010dl\u00e1nku, str\u00e1vil 18 mesiacov sledovan\u00edm obchodov na \u0161iestich decentralizovan\u00fdch burz\u00e1ch. Potom sa zmerali, ke\u010f po\u010duli o transakci\u00e1ch, ktor\u00ed ich ozn\u00e1mili a kedy.\u00a0Inform\u00e1cie odhalili, ako roboty vyu\u017e\u00edvali \u010dasov\u00e9 oneskorenia v syst\u00e9me na to, aby obchody boli ove\u013ea r\u00fdchlej\u0161ie, ne\u017e by mohli pou\u017e\u00edvatelia pou\u017e\u00edva\u0165, \u010do im umo\u017enilo pou\u017e\u00edva\u0165 taktiky, ako je napr. Boti by tie\u017e mohli zmeni\u0165 poradie svojich transakci\u00ed, aby boli v\u00fdnosnej\u0161ie, alebo vyu\u017eili \u013eudsk\u00e9 chyby.                                                                                                                                                                                                                                                                                                                                                                                                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