{"id":19948,"date":"2021-07-05T10:24:37","date_gmt":"2021-07-05T08:24:37","guid":{"rendered":"https:\/\/bitcoinromania.ro\/blog\/?p=19948"},"modified":"2026-03-01T13:34:44","modified_gmt":"2026-03-01T11:34:44","slug":"blockchain-ce-este-si-cum-functioneaza","status":"publish","type":"post","link":"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/","title":{"rendered":"Blockchain: Ce este si cum functioneaza?"},"content":{"rendered":"<p>\u00cen acest moment, anul de gra\u021bie 2022, sunt foarte mul\u021bi oameni care au auzit, dac\u0103 nu chiar investesc deja, in criptomonede. \u0218i cum altfel? La televizorul, re\u021belele sociale, radio sau in frizerii, peste tot, Bitcoin a devenit un subiect foarte intalnit, este discutat la fel de des ca vremea \u00een ultima perioad\u0103. S\u0103 nu mai vorbim despre to\u021bi traderii, care \u0219tiu <a href=\"https:\/\/bitcoinromania.ro\/blog\/ce-este-bitcoin\/\">ce este Bitcoin<\/a>, c\u00e2nd \u0219i cum se tranzac\u021bioneaz\u0103 \u00een ce direc\u021bie se \u00eendreapt\u0103 pia\u021ba crypto. Criptomonedele primesc aten\u021bie din partea oamenilor, iar informa\u021biile pe care oamenii le transmit mai departe sunt extrem de subiective, de aceea v\u0103 propunem s\u0103 v\u0103 informa\u021bi, asemenea jurnali\u0219tilor, din cel pu\u021bin trei surse \u00eenainte de a cump\u0103ra criptomonede.<\/p>\n<p>Cel mai important aspect al investi\u021biilor \u00een criptomonede porne\u0219te de la \u00een\u021belegerea perfect\u0103 a re\u021belei din spatele Bitcoin sau a multor altor criptomonede \u0219i anume tehnologia blockchain.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Cuprins<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a11a0436b40c\" class=\"ez-toc-cssicon-toggle-label\"><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><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a11a0436b40c\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Ce_este_Blockchain\" >Ce este Blockchain?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Cum_functioneaza_Blockchain\" >Cum functioneaza Blockchain?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Blockchain_VS_Banci\" >Blockchain VS B\u0103nci<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Securitate\" >Securitate<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Transparenta\" >Transparenta<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Descentralizarea\" >Descentralizarea<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Avantajele_Blockchain\" >Avantajele Blockchain<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Cum_poti_folosi_Blockchain\" >Cum poti folosi Blockchain?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/#Cum_poti_tranzactiona_criptomonede_cu_ajutorul_Blockchain\" >Cum poti tranzactiona criptomonede cu ajutorul Blockchain?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Ce_este_Blockchain\"><\/span>Ce este Blockchain?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u00cen primul r\u00e2nd, pornim de la terminologie \u0219i \u00eencepem cu defini\u021bia blockchain. Blockchain este tehnologia care ajut\u0103 la tranzac\u021bionarea criptomonedelor, cum este Bitcoin.<\/p>\n<p>\u00cen principiu, blockchain este o re\u021bea av\u00e2nd o baz\u0103 de date, care stocheaz\u0103 at\u00e2t datele utilizatorilor, dar \u0219i toate opera\u021biunile. O re\u021bea blockchain este constituit\u0103 din mai multe blocuri, fiecare av\u00e2nd o identitate unic\u0103, numit\u0103 hash. Fiecare bloc con\u021bine informa\u021biile hash-ului blocului anterior, p\u00e2n\u0103 se ajunge la blocul original. De la apari\u021bia sa, p\u00e2n\u0103 \u00een prezent, tehnologia blockchain a fost \u0219i este folosit\u0103 \u00een diverse domenii, nu doar cel legat de criptomonede. De la votul electronic, p\u00e2n\u0103 la industria farmaceutic\u0103, companiile \u00een\u021beleg \u0219i utilizeaz\u0103 aceast\u0103 inova\u021bie. Dar ce \u00eenseamn\u0103 blockchain de fapt? Cred c\u0103 oric\u00e2t de am\u0103nun\u021bit\u0103 ar fi defini\u021bia oferit\u0103 de noi, vom \u00eencerca de-a lungul acestui articol s\u0103 explic\u0103m pas cu pas fiecare aspect al re\u021belei.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cum_functioneaza_Blockchain\"><\/span>Cum functioneaza Blockchain?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-22300 alignnone\" src=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash.jpg\" alt=\"blockchain\" width=\"1920\" height=\"1080\" srcset=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash.jpg 1920w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash-300x169.jpg 300w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash-1024x576.jpg 1024w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash-768x432.jpg 768w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash-1536x864.jpg 1536w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash-720x405.jpg 720w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/shubham-dhage-T9rKvI3N0NM-unsplash-685x385.jpg 685w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/p>\n<p>Principalul scop al blockchain-ului este de a permite \u00eenregistrarea \u0219i distribuirea informa\u021biilor digitale, dar nu \u0219i editarea lor. \u00cen acest mod, tehnologia reprezint\u0103 baza pentru registre permanente sau pentru \u00eenregistr\u0103ri ale tranzac\u021biilor care nu pot suferi modific\u0103ri, care nu pot fi \u0219terse sau distruse. Acesta este motivul pentru care blockchain-urile sunt cunoscute \u0219i sub denumirea de tehnologie de registru distribuit (DLT).<\/p>\n<p>Prima men\u021biune despre Blockchain a fost \u00een 1991, c\u00e2nd era considerat doar proiect de cercetare, iar prima aplicare a avut loc odat\u0103 cu apari\u021bia primei monede digitale, Bitcoin, \u00een 2009. De atunci \u0219i p\u00e2n\u0103 acum, utilitatea tehnologiei Blockchain a devenit extrem de popularizat\u0103, fiind considerat, dup\u0103 cum ar spune comediantul american, Stephen Colbert, \u201eaur pentru tocilari\u201d Cu ajutorul acestei re\u021bele s-au create \u0219i alte criptomonede, aplica\u021bii financiare descentralizate (DeFi), NFT-uri \u0219i contracte inteligente.<\/p>\n<p>Blockchain este o tehnologie open source, care ofer\u0103 alternativa transferului tradi\u021bional de fiat. Pentru a oferi un exemplu la \u00eendem\u00e2na oricui, compara\u021bi transferul tradi\u021bional cu tranzac\u021biile digitale. C\u00e2nd v\u0103 duce\u021bi la banca pentru a realiza un transfer, care presupune depunerea unei sume de bani \u00eentr-un cont apar\u021bin\u0103tor al altei persoane. Acest transfer este intermediat de o persoan\u0103. \u00cen domeniul crypto, persoana este \u00eenlocuit\u0103 cu un sistem de blocuri, care sunt inventate pentru a oferi un grad ridicat de securitate, vitez\u0103 \u0219i desigur, siguran\u021b\u0103. Diferen\u021bele sunt c\u0103, \u00een cazul unui transfer bancar, durata de procesare este destul de ridicat\u0103, dac\u0103 vorbim despre transfer interbancar sau interna\u021bional sau despre valute diferite (EUR), costurile sunt extrem de ridicate \u0219i sunt percepute taxe enorme.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Blockchain_VS_Banci\"><\/span>Blockchain VS B\u0103nci<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"size-full wp-image-22274 alignnone\" src=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747.jpg\" alt=\"ETF Bitcoin\" width=\"1386\" height=\"924\" srcset=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747.jpg 1386w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747-300x200.jpg 300w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747-1024x683.jpg 1024w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747-768x512.jpg 768w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747-1536x1024.jpg 1536w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747-600x400.jpg 600w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747-720x480.jpg 720w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-rodnae-productions-8370747-685x457.jpg 685w\" sizes=\"(max-width: 1386px) 100vw, 1386px\" \/><\/p>\n<p>Am men\u021bionat c\u00e2teva diferen\u021be anterior, dintre blockchain \u0219i b\u0103nci, dar acestea nu se opresc aici. Cu toate c\u0103 Blockchain a fost g\u00e2ndit ca un sistem care s\u0103 faciliteze b\u0103ncile \u0219i \u00eentreg sectorul financiar, \u00een special \u00een ceea ce prive\u0219te tranzac\u021biile de pl\u0103\u021bi. Cu toate acestea, b\u0103ncile \u0219i tehnologia blockchain sunt extrem de diferite.<\/p>\n<p>Putem porni de la deschiderea programului \u00een cazul b\u0103ncilor: acestea au un program extrem de radical, de cele mai multe ori enervant pentru mul\u021bi dintre noi, fiind de la 09:00 \u2013 17:00, \u00een timp ce blockchain este disponibil non-stop, 24h\/7. Poate o s\u0103 v\u0103 g\u00e2ndi\u021bi c\u0103 totu\u0219i exist\u0103 aplica\u021bii bancare \u0219i po\u021bi pl\u0103ti cu cardul bancar. Da, dar pl\u0103\u021bile cu cardul percep taxe, care pot varia \u00een func\u021bie de banc\u0103. Efectul acestui comision poate face ca uneori costul bunurilor \u0219i serviciilor s\u0103 creasc\u0103. Bitcoin are comisioane de tranzac\u021bii variabile, stabilite de mineri \u0219i de utilizatori. Rapiditatea de transfer poate dura, \u00een cazul b\u0103ncilor \u00eentre 24 &#8211; 48h, \u00een timp ce un transfer cu Bitcoin poate fi procesat \u00een 15 minute.<\/p>\n<p>Despre toate celelalte diferen\u021be, legate de securitate, transparen\u021ba re\u021belei \u0219i descentralizarea vom discuta punctual.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Securitate\"><\/span>Securitate<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Securitatea blockchain este asigurat\u0103 \u00een mai multe moduri. \u00cen primul r\u00e2nd, blocurile noi sunt \u00eentotdeauna stocate liniar \u0219i cronologic. Asta \u00eenseamn\u0103 c\u0103 sunt ad\u0103ugate \u00eentotdeauna la \u201efinalul listei\u201d de blockchain. Dup\u0103 ce un bloc a fost ad\u0103ugat acolo este dificil de revenit asupra lui, pentru a fi modificat, cu excep\u021bia cazului \u00een care majoritatea membrilor care au ajutat la crearea blocului \u00ee\u0219i doresc acest lucru. Asta se \u00eent\u00e2mpl\u0103 datorit\u0103 faptului c\u0103 fiecare bloc con\u021bine propriul hash, \u00eempreun\u0103 cu hash-ul blocului anterior, precum \u0219i marca temporal\u0103 men\u021bionat\u0103 anterior. Codurile hash sunt create prin func\u021bii matematice, care transform\u0103 informa\u021biile digitale \u00eentr-un \u0219ir de numere \u0219i litere. Dac\u0103 aceste informa\u021bii sunt modificate \u00een vreun fel, atunci \u0219i codul hash se modific\u0103. Un hash este un termen des utilizat c\u00e2nd ne referim la tehnologia blockchain. Hashing se refer\u0103 la transformarea \u0219i generarea datelor de intrare de orice lungime \u00eentr-un \u0219ir de caractere de o dimensiune fix\u0103, care se realizeaz\u0103 printr-un algoritm specific. \u00cen special, algoritmul de hash Bitcoin este SHA-256 sau Secure Hashing Algorithm 256 bi\u021bi. Acest algoritm este o func\u021bie criptografic\u0103 unidirec\u021bional\u0103, deoarece datele originale nu pot fi recuperate prin decriptare.<\/p>\n<p>S\u0103 oferim un exemplu clar despre cum arat\u0103 securitatea blockchain. Atunci c\u00e2nd un hacker \u00eencearc\u0103 s\u0103 modifice un blockchain cu scopul de a fura criptomonedele din acel bloc, acesta \u0219i-ar modifica propria copie unic\u0103, iar aceasta nu s-ar mai alinia la copiile celorlal\u021bi din bloc. Atunci c\u00e2nd to\u021bi ceilal\u021bi \u00ee\u0219i verific\u0103 copiile \u00eentre ele, ar observa c\u0103 una iese \u00een eviden\u021b\u0103, fiind diferit\u0103, versiunea hackerului ar fi respins\u0103 automat, fiind nelegitim\u0103. Pentru o reu\u0219it\u0103, acest hacker ar trebui s\u0103 modifice simultan 51% din copiile lan\u021bului de blocuri, astfel \u00eenc\u00e2t noua copie s\u0103 devin\u0103 majoritar\u0103. Un astfel de atac ar necesita, de asemenea, o sum\u0103 imens\u0103 de bani \u0219i resurse, deoarece ar trebui s\u0103 refac\u0103 toate blocurile, iar acestea ar avea acum timestamp-ul \u0219i coduri hash diferite. Toate acestea ar fi insuportabile. Nu numai c\u0103 ar fi foarte costisitor, dar cel mai probabil nu ar da niciun rezultat. Realizarea unui astfel de lucru nu ar trece neobservat\u0103, deoarece membrii re\u021belei ar vedea astfel de modific\u0103ri drastice ale blockchain-ului \u0219i membrii ar trece la o re\u021bea care nu a suferit nicio modificare. Acest lucru ar face ca oricum valoarea criptomonedelor s\u0103 scad\u0103 \u0219i reu\u0219ita s\u0103 fie una nul\u0103.<\/p>\n<p>Pentru securitate maxim\u0103, criptomonedele sunt stocate de cele mai multe ori \u00eentr-un <a href=\"https:\/\/bitcoinromania.ro\/blog\/ce-este-portofel-bitcoin\/\">portofel Bitcoin<\/a>, care este format din dou\u0103 componente principale: cheie public\u0103 \u0219i cheie privat\u0103. Cheia publica este compus\u0103 dintr-un cod QR \u0219i o adres\u0103 de wallet care poate fi v\u0103zut\u0103 de oricine \u0219i reprezint\u0103 adresa de depunere. Cheia privat\u0103 are acela\u0219i principiu, respectiv cod QR \u0219i adres\u0103 de wallet, care poate fi folosit\u0103 pentru retragere. Cu excep\u021bia posesorului cheii private, nimeni nu trebuie s\u0103 cunoasc\u0103 aceast\u0103 adres\u0103. Blockchain este re\u021beaua prin care se realizeaz\u0103 un transfer dintr-un portofel \u00een altul, dintr-o adres\u0103 \u00een alta. C\u00e2nd o persoan\u0103 vrea s\u0103 realizeze un transfer de crypto, aceasta \u00ee\u0219i schimb\u0103 adresa de la proprietar la destinatar. Acest tip de tranzac\u021bie este verificat\u0103 de c\u0103tre mineri \u00een blockchain \u0219i abia dup\u0103 sunt \u00eenregistrate toate confirm\u0103rile, cantitatea de BTC ajunge \u00een portofelul expediat.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Transparenta\"><\/span>Transparenta<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u00cen blockchain toate tranzac\u021biile pot fi v\u0103zute si sunt transparente. Transparen\u021ba blockchain este oferit\u0103 de natura blockchain, care este o re\u021bea descentralizat\u0103 de blocuri, fie prin existen\u021ba unui nod personal, fie prin utilizatorii de lan\u021buri de blocuri, care permit oricui s\u0103 vad\u0103 tranzac\u021biile in curs de derulare. Fiecare nod are propria sa copie a lan\u021bului, care este actualizat\u0103 pe m\u0103sur\u0103 ce sunt confirmate \u0219i ad\u0103ugate blocuri noi.<\/p>\n<p>Spre exemplu, bursele erau \u00een mare vog\u0103 \u00een trecut \u0219i to\u021bi cei care au stocat Bitcoin acolo au pierdut tot. Dac\u0103 un hacker este anonim, cantitatea de Bitcoin retras\u0103 nu \u0219i poate fi u\u0219or de urm\u0103rit. Dac\u0103 o cantitate de BTC ar fi mutat\u0103 sau cheltuit\u0103, s-ar \u0219ti imediat. Desigur, ca \u00een cazul tuturor stoc\u0103rilor, acestea sunt criptate. Acest lucru \u00eenseamn\u0103 c\u0103 doar proprietarul unei \u00eenregistr\u0103ri o poate decripta pentru a-\u0219i dezv\u0103lui identitatea (folosind o pereche de chei publice &#8211; private). Prin urmare, utilizatorii blockchain-urilor pot r\u0103m\u00e2ne anonimi, p\u0103str\u00e2nd \u00een acela\u0219i timp transparen\u021ba.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Descentralizarea\"><\/span>Descentralizarea<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pentru a \u00een\u021belege acest punct al articolului, trebuie s\u0103 v\u0103 imagina\u021bi o companie care de\u021bine un num\u0103r enorm de calculatoare pentru a men\u021bine baza de date ale clien\u021bilor s\u0103i. Aceast\u0103 companie are o cl\u0103dire \u00een care \u021bine toate calculatoarele, toate acestea sub un singur acoperi\u0219 \u0219i de\u021bine controlul deplin asupra fiec\u0103rui calculator \u0219i a informa\u021biilor din el. Desigur c\u0103 acest scenariu are punctele sale negative: dac\u0103 se \u00eentrerupe curentul, dac\u0103 cade conexiunea la internet, dac\u0103 ia foc cl\u0103direa, dac\u0103 cineva apas\u0103 pe o tast\u0103 gre\u0219it\u0103 \u0219i s-a pierdut toat\u0103 informa\u021bia?<\/p>\n<p>Ceea ce face blockchain este s\u0103 r\u0103sp\u00e2ndeasc\u0103 datele din baza de date \u00een mai multe noduri de re\u021bea din loca\u021bii diferite. Acest lucru creeaz\u0103 redundan\u021b\u0103 \u0219i fidelitatea datelor stocate \u00een baza de date &#8211; dac\u0103 cineva \u00eencearc\u0103 s\u0103 modifice o \u00eenregistrare \u00eentr-o instan\u021b\u0103 a bazei de date, celelalte noduri nu vor fi modificate. Spre deosebire de poveste, dac\u0103 ia foc cl\u0103direa, celelalte date nu sunt afectate. \u00cen cazul unui atac, nodurile transmit date \u00eentre ele \u0219i identific\u0103 cu u\u0219urin\u021b\u0103 nodul cu informa\u021bia incorect\u0103. Acest sistem ajut\u0103 la stabilirea unei ordini exacte \u0219i transparente a evenimentelor. \u00cen acest fel, niciun nod din re\u021bea nu poate modifica informa\u021biile de\u021binute \u00een cadrul acesteia.<\/p>\n<p>Din acest motiv, informa\u021biile \u0219i istoricul (cum ar fi cel al tranzac\u021biilor unei criptomonede) sunt ireversibile. O astfel de \u00eenregistrare ar putea fi o list\u0103 de tranzac\u021bii (cum ar fi cele cu o criptomoneda), dar este, de asemenea, posibil ca un blockchain s\u0103 de\u021bin\u0103 o varietate de alte informa\u021bii, cum ar fi contracte juridice, identific\u0103ri de stat sau inventarul de produse al unei companii.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Avantajele_Blockchain\"><\/span>Avantajele Blockchain<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"size-full wp-image-22258 alignnone\" src=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217.jpg\" alt=\"analiza efect leverage\" width=\"1386\" height=\"924\" srcset=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217.jpg 1386w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217-300x200.jpg 300w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217-1024x683.jpg 1024w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217-768x512.jpg 768w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217-1536x1024.jpg 1536w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217-600x400.jpg 600w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217-720x480.jpg 720w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/pexels-nataliya-vaitkevich-6120217-685x457.jpg 685w\" sizes=\"(max-width: 1386px) 100vw, 1386px\" \/><\/p>\n<p>Avantajul tehnologiei blockchain este ca poate fi accesat\u0103 de oricare dintre utilizatori, dac\u0103 ace\u0219tia au un dispozitiv digital \u0219i acces la internet. Acest proces se traduce prin siguran\u021b\u0103 maxima: doi oameni pot trimite monede \u00eentre ei f\u0103r\u0103 a fi nevoie de o a treia parte, cum este cazul transferurilor bancare. C\u00e2nd se face un astfel de schimb, fiecare block prime\u0219te c\u00e2te o copie a registrului. Astfel, orice opera\u021biune este distribuit\u0103 \u00een toate dispozitivele utilizatorilor implica\u021bi la un moment dat la baza de date. Acest lucru face ca unui hacker sa \u00eei fie aproape imposibil\u0103 accesarea, pentru ca nu poate p\u0103trunde clandestin \u00een tranzac\u021bie f\u0103r\u0103 sa afle cel care a ini\u021biat tranzac\u021bia originara.<\/p>\n<p>Pe l\u00e2ng\u0103 securitate, blockchain are avantajul costurilor reduse. Tranzac\u021bionarea de criptomonede, datorit\u0103 neimplic\u0103rii efectiva a factorului uman, percepe un comision infirm.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cum_poti_folosi_Blockchain\"><\/span>Cum poti folosi Blockchain?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Dup\u0103 cum \u0219tim acum, blocurile de pe blockchain-ul Bitcoin stocheaz\u0103 date despre tranzac\u021biile monetare. \u00cen prezent, exist\u0103 peste 10.000 de alte sisteme de criptomonede care func\u021bioneaz\u0103 pe blockchain. Dar se pare c\u0103 blockchain este, de fapt, o modalitate fiabil\u0103 de stocare a datelor \u0219i despre alte tipuri de tranzac\u021bii.<\/p>\n<p>Exist\u0103 deja multe companii care au adoptat blockchain pentru a le u\u0219ura via\u021ba precum Walmart, Pfizer, AIG, Siemens, Unilever. De exemplu, IBM a creat blockchain-ul Food Trust pentru a urm\u0103ri traseul parcurs de produsele alimentare pentru a ajunge \u00een loca\u021biile lor. Ace\u0219tia au apelat la aceast\u0103 metod\u0103 pentru c\u0103 industria alimentar\u0103 a suferit multe focare de infec\u021bie E. coli, salmonella \u0219i listeria, precum \u0219i la introducerea accidental\u0103 de materiale periculoase \u00een alimente.<\/p>\n<p>\u00cen trecut, au trecut s\u0103pt\u0103m\u00e2ni bune p\u00e2n\u0103 s-a g\u0103sit sursa cauzatoare de \u00eemboln\u0103viri. Prin folosirea blockchain, m\u0103rcile au posibilitatea de a urm\u0103ri traseul unui produs alimentar de la origine, prin fiecare oprire pe care o face \u0219i, \u00een final, p\u00e2n\u0103 la livrare. Dac\u0103 se constat\u0103 c\u0103 un produs alimentar este contaminat, atunci acesta poate fi urm\u0103rit pe tot parcursul fiec\u0103rei opriri p\u00e2n\u0103 la origine. Nu numai at\u00e2t, dar aceste companii pot vedea acum \u0219i tot ceea ce ar fi putut intra \u00een contact cu acesta, ceea ce permite identificarea problemei mult mai repede \u0219i poate salva vie\u021bi. Acesta este un exemplu de blockchain \u00een practic\u0103, dar exist\u0103 multe alte forme de implementare a blockchain.<\/p>\n<p>Un alt exemplu este cel al serviciilor medicale. Spitalele pot folosi blockchain pentru a stoca \u00een siguran\u021b\u0103 dosarele medicale ale pacien\u021bilor lor. Atunci c\u00e2nd o fi\u0219\u0103 medical\u0103 este generat\u0103 \u0219i semnat\u0103, aceasta poate fi scris\u0103 \u00een blockchain, ceea ce le ofer\u0103 pacien\u021bilor dovada \u0219i \u00eencrederea c\u0103 fi\u0219a nu poate fi modificat\u0103. Aceste dosare medicale personale ar putea fi codificate \u0219i stocate \u00een blockchain cu o cheie privat\u0103, astfel \u00eenc\u00e2t s\u0103 fie accesibile doar anumitor persoane, asigur\u00e2nd astfel confiden\u021bialitatea.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cum_poti_tranzactiona_criptomonede_cu_ajutorul_Blockchain\"><\/span>Cum poti tranzactiona criptomonede cu ajutorul Blockchain?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-22291 alignnone\" src=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n.jpg\" alt=\"tranzactionare criptomonede\" width=\"2048\" height=\"1448\" srcset=\"https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n.jpg 2048w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n-300x212.jpg 300w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n-1024x724.jpg 1024w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n-768x543.jpg 768w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n-1536x1086.jpg 1536w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n-720x509.jpg 720w, https:\/\/bitcoinromania.ro\/blog\/wp-content\/uploads\/2022\/06\/257413066_4482492225171927_4569332795499126327_n-685x484.jpg 685w\" sizes=\"(max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<p>Pentru a putea face transfer dintr-o parte \u00een alta, acest transfer trebuie s\u0103 se reg\u0103seasc\u0103 \u00eentr-o form\u0103. Forma pe care o ia este divers\u0103 \u0219i este in totalitate alegerea dumneavoastr\u0103 personal\u0103. Exista o sumedenie de exemple de aplica\u021bii de tip blockchain \u0219i denumirea lor generala este de wallet. Aceasta poate fi sub forma de portofel integrat \u00een platforma cu care tranzactionati. Cum este BTR Vault in platformele online sau aplica\u021bii pe telefon, unele dintre ele folosind in denumirea lor cuvantul blockchain, pentru a putea fi agreate \u0219i \u00een\u021belese de utilizatori.<\/p>\n<p>Astfel de aplica\u021bii sunt utilizate de persoanele care folosesc ATM-urile Bitcoin. Pentru a putea face o stocare de la ATM in walletul personal este necesar sa scanati codul QR al tichetului. Codul o sa fie scanat \u00een portofelul personal. Este mai usor, atunci cand folositi ATM-urile, sa aveti totul \u00een telefonul personal.<\/p>\n<p>In termeni generali, blockchain este o re\u021bea care nu poate fi modificata, nu este controlat\u0103 de nicio entitate sau vreun guvern si este cea mai sigur\u0103 modalitate de trimitere a banilor dumneavoastra. Oamenii compara blockchain cu orice mare inovatie si este asezat la loc de cinste cu toate celelalte mari investi\u021bii ale omenirii, al\u0103turi de internet sau electricitate. Atat de important\u0103 este tehnologia blockchain \u0219i este doar o chestiune de timp pana cand, nu daca, o sa fie folosit\u0103 ca orice altceva \u00een acest moment.<\/p>\n<p>Cumpara si vinde Bitcoin simplu si rapid prin Bitcoin Romania prin platforma online de tranzactionare pro.bitcoinromania.ro sau prin cea mai extins\u0103 re\u021bea de ATM-uri crypto din \u021bar\u0103. Fie ca alegi platforma online, fie ca vorbim despre bancomatul cel mai apropiat de tine, Bitcoin Romania \u00ee\u021bi aduce cele mai mici comisioane, cel mai bine securizat sistem \u0219i cea mai frumoas\u0103 experien\u021ba de tranzac\u021bionare.<\/p>\n<p>Indiferent de momentul \u00een care te afli, dac\u0103 e\u0219ti la \u00eenceput sau nu, trebuie s\u0103 faci doar deciziile potrivite \u021bie. Bitcoin Romania, cel mai mare exchange crypto din Rom\u00e2nia, v\u0103 ofer\u0103 posibilitatea de cump\u0103rare a criptomonedelor at\u00e2t prin platformele online, c\u00e2t \u0219i prin intermediul celei mai extinse re\u021bele de ATM-uri crypto, simplu, sigur si rapid, cu cel mai mic comision din pia\u021b\u0103. Blog-ul nostru prezint\u0103 previziuni ale criptomonedelor, sus\u021binute de anali\u0219ti, foarte atent documentate. Nu v\u0103 sf\u0103tuim s\u0103 cump\u0103ra\u021bi dec\u00e2t acele monede \u00een care ave\u021bi cu adev\u0103rat \u00eencredere, a c\u0103ror white paper l-a\u021bi citit \u0219i \u00eei \u00een\u021belege\u021bi scopul \u0219i misiunea lor. Cel mai important, nu v\u0103 sf\u0103tuim s\u0103 investi\u021bi banii pe care nu sunte\u021bi dispu\u0219i s\u0103-i pierde\u021bi. Pia\u021ba crypto este foarte frumoas\u0103, dar sufer\u0103 volatilitate, ceea ce poate \u00eensemna, mai ales pentru un \u00eencep\u0103tor, risc ridicat. \u00cen acest moment pre\u021bul Bitcoin este unul sc\u0103zut, comparativ cu alte momente ale evolu\u021biei sale, dar \u0219i ridicat dac\u0103 compar\u0103m ultimii 5 ani. Pentru unii ar putea p\u0103rea c\u0103 ne bucur\u0103m de o reducere extraordinar\u0103 \u00eenainte de un nou val de cre\u0219teri.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00cen acest moment, anul de gra\u021bie 2022, sunt foarte mul\u021bi oameni care au auzit, dac\u0103 nu chiar investesc deja, in criptomonede. \u0218i cum altfel? La televizorul, re\u021belele sociale, radio sau in frizerii, peste tot, Bitcoin a devenit un subiect foarte intalnit, este discutat la fel de des ca vremea \u00een ultima perioad\u0103. S\u0103 nu mai vorbim despre to\u021bi traderii, care \u0219tiu ce este Bitcoin, c\u00e2nd \u0219i cum se tranzac\u021bioneaz\u0103 \u00een ce direc\u021bie se \u00eendreapt\u0103 pia\u021ba crypto. Criptomonedele primesc aten\u021bie din<a class=\"more-link\" href=\"https:\/\/bitcoinromania.ro\/blog\/blockchain-ce-este-si-cum-functioneaza\/\"><span>Read More<\/span><\/a><\/p>\n","protected":false},"author":9,"featured_media":19949,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[814],"tags":[],"class_list":["post-19948","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blockchain-academy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Blockchain: Ce este si cum functioneaza? - Bitcoin Romania<\/title>\n<meta name=\"description\" content=\"Ce este si cum functioneaza Blockchain. 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