{"id":1530,"date":"2023-03-05T22:08:15","date_gmt":"2023-03-05T22:08:15","guid":{"rendered":"https:\/\/securitybriefing.net\/?p=1530"},"modified":"2023-03-05T22:08:15","modified_gmt":"2023-03-05T22:08:15","slug":"confidentialitate-si-securitate-ca-principale-caracteristici-ale-blockchain-partea-1","status":"publish","type":"post","link":"https:\/\/securitybriefing.net\/ro\/lant-de-blocuri\/confidentialitate-si-securitate-ca-principale-caracteristici-ale-blockchain-partea-1\/","title":{"rendered":"Confiden\u021bialitatea \u0219i securitatea ca principale caracteristici ale Blockchain: Partea 1"},"content":{"rendered":"<p>\u201cBlockchain\u201d este un termen folosit pentru a se referi la o tehnologie de consens descentralizat\u0103 care de\u021bine un poten\u021bial considerabil pentru dezvoltarea unor noi funda\u021bii pentru dezvoltarea socio-economic\u0103 \u0219i descentralizarea securit\u0103\u021bii \u00een domenii emergente. Datorit\u0103 capacit\u0103\u021bii sale de a construi \u00een mod eficient \u00eencrederea \u00eentre oameni \u0219i ma\u0219ini, blockchain-ul reduce costurile \u0219i \u00eembun\u0103t\u0103\u021be\u0219te utilizarea resurselor.<\/p>\n\n\n\n<p>Comanda <a href=\"\/ro\/Blockchain%20Facts%20What%20Is%20It,%20How%20It%20Works,%20and%20How%20It%20Can%20Be%20Used.htm\/\">blockchain<\/a> tehnologia devine din ce \u00een ce mai vital\u0103 \u00een diverse domenii, inclusiv Bitcoin, Ethereum \u0219i Hyperledger. Cu toate acestea, \u00een ultimul deceniu, s-au realizat progrese semnificative \u00een aceast\u0103 tehnologie, duc\u00e2nd la provoc\u0103ri diverse \u00een ceea ce prive\u0219te securitatea datelor \u0219i protec\u021bia vie\u021bii private. Aceste provoc\u0103ri includ trasabilitatea tranzac\u021biilor, gruparea conturilor, atacurile Sybil, atacurile de eclips\u0103 \u0219i atacurile frauduloase asupra contractelor inteligente. Aceste atacuri \u00eencalc\u0103 grav securitatea datelor \u0219i confiden\u021bialitatea utilizatorilor \u0219i, prin urmare, trebuie abordate.<\/p>\n\n\n\n<p><strong>Securitatea \u0219i confiden\u021bialitatea \u00een Blockchain este o linie de cercetare?<\/strong><\/p>\n\n\n\n<p>Ast\u0103zi, cercet\u0103tori din mediul academic \u0219i din industrie se reunesc regulat pentru a discuta despre cercetarea datelor Blockchain, securitatea \u0219i protec\u021bia confiden\u021bialit\u0103\u021bii. Ei examineaz\u0103 cuprinz\u0103tor provoc\u0103rile cu care se confrunt\u0103 dezvoltarea viitoare a tehnologiei Blockchain \u0219i ofer\u0103 analize aprofundate ale tehnicilor de securitate cibernetic\u0103 de ultim\u0103 or\u0103. Toate aspectele pe care le abordeaz\u0103 sunt legate de securitatea \u0219i confiden\u021bialitatea \u00een Blockchain.<\/p>\n\n\n\n<p>Editoriale \u0219i edi\u021bii indexate legate de Blockchain pot fi g\u0103site, inclusiv evolu\u021bii \u00een metodele de detectare a sp\u0103l\u0103rii comerciale \u00een Ethereum Blockchains, cadre pentru evaluarea descentraliz\u0103rii nodurilor \u00een re\u021belele peer-to-peer \u0219i studii despre obfusca\u021bia criptografic\u0103 pentru contractele inteligente. Unele lucr\u0103ri prezint\u0103 scheme care permit utilizatorilor s\u0103 furnizeze intr\u0103ri criptate pentru contracte inteligente criptate \u0219i s\u0103 permit\u0103 unei ter\u021be p\u0103r\u021bi ne\u00eencredere s\u0103 le execute. Aceste aplica\u021bii ofer\u0103 direc\u021bie pentru modelul \u00een practica securit\u0103\u021bii Blockchain \u0219i demonstreaz\u0103 securitatea schemelor de obfuscare.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"what-other-intellectual-endeavors-on-blockchain-are-there\"><strong>Ce alte eforturi intelectuale pe Blockchain exist\u0103?<\/strong><\/h2>\n\n\n<p>Exist\u0103, de asemenea, eforturi pentru m\u0103surarea descentraliz\u0103rii nodurilor \u00een re\u021belele peer-to-peer Blockchain. \u00cen acest sens, au fost prezentate NodeMaps, care este un cadru de m\u0103surare a descentraliz\u0103rii nodurilor de date pentru a captura, analiza \u0219i vizualiza date din diverse platforme Blockchain P2P populare, cum ar fi Bitcoin, Lightning Network, Cosmos \u0219i Stellar. Cu alte cuvinte, ele efectueaz\u0103 analiza adreselor IP \u0219i ofer\u0103 o imagine de ansamblu a fiec\u0103rei platforme Blockchain pentru a compara \u0219i contrasta informa\u021biile despre distribu\u021bia geografic\u0103, ASN \u0219i versiunea nodurilor lor. M\u0103sur\u0103torile sunt evaluate pentru a elucida gradul de descentralizare a nodurilor \u00een re\u021beaua de baz\u0103 a diferitelor blockchains.<\/p>\n\n\n\n<p>Un alt subiect de interes este detectarea \u0219i cuantificarea comer\u021bului de sp\u0103lare \u00een lan\u021b pentru criptomonedele ERC20. Subiectul re-studiului este comer\u021bul de sp\u0103lare pe <a href=\"\/ro\/ERC-20%20Token%20Standard%20ethereum.org.htm\/\">criptomonedele ERC20 prin efectuarea unei analize sistematice a lan\u021bului de date al tranzac\u021biilor. Pentru aceasta, comer\u021bul de sp\u0103lare a fost definit matematic folosind setul de adrese de stare, \u0219i pentru aceasta au fost propuse algoritmi pentru a rezerva dovezi directe ale comer\u021bului de sp\u0103lare. Dup\u0103 ob\u021binerea caracteristicilor comer\u021bului de sp\u0103lare, ele cuantific\u0103 volumul comer\u021bului de sp\u0103lare \u0219i ofer\u0103 reglement\u0103ri de pia\u021b\u0103 pentru a preveni comer\u021bul de sp\u0103lare.<\/a> De asemenea, s-au f\u0103cut progrese \u00een dezvoltarea metodelor pentru gruparea robust\u0103 a tranzac\u021biilor Ethereum folosind scurgeri de timp ale nodurilor fixe, al c\u0103ror schem\u0103 acoper\u0103 toate tranzac\u021biile \u0219i este rezistent\u0103 la tehnicile de \u00eembun\u0103t\u0103\u021bire a confiden\u021bialit\u0103\u021bii. Folosind marcajele temporale retransmise de la N noduri fixe pentru a descrie propriet\u0103\u021bile re\u021belei tranzac\u021biilor, schema grupeaz\u0103 tranzac\u021biile care intr\u0103 \u00een re\u021bea de la acela\u0219i nod surs\u0103.<\/p>\n\n\n\n<p>Cum func\u021bioneaz\u0103 Blockchain-ul.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"how-the-blockchain-works\"><strong>Un blockchain serve\u0219te func\u021bional ca o baz\u0103 de date distribuit\u0103 securizat\u0103 a \u00eenregistr\u0103rilor tranzac\u021biilor. \u00centr-o re\u021bea Bitcoin, dac\u0103 utilizatorul A dore\u0219te s\u0103 trimit\u0103 ni\u0219te Bitcoins altui utilizator B, el va crea o tranzac\u021bie Bitcoin de c\u0103tre utilizatorul A. Tranzac\u021bia trebuie s\u0103 fie aprobat\u0103 de mineri \u00eenainte de a fi angajat\u0103 de re\u021beaua Bitcoin. Pentru a \u00eencepe procesul de minare, tranzac\u021bia este transmis\u0103 tuturor nodurilor din re\u021bea, care sunt colectate de mineri ca tranzac\u021bii \u00eentr-un bloc, care vor verifica tranzac\u021biile din bloc \u0219i vor transmite blocul \u0219i verificarea acestuia folosind un protocol de consens. Acestea sunt cunoscute sub numele de Proof of Work pentru a ob\u021bine aprobarea din partea re\u021belei.<\/strong><\/h2>\n\n\n<p>C\u00e2nd alte noduri verific\u0103 faptul c\u0103 toate tranzac\u021biile con\u021binute \u00een bloc sunt valide, blocul poate fi ad\u0103ugat la blockchain. Doar c\u00e2nd blocul care con\u021bine tranzac\u021bia este aprobat de celelalte noduri \u0219i ad\u0103ugat la blockchain, acest transfer de Bitcoin de la utilizatorul A la utilizatorul B va fi finalizat \u0219i legitim.<\/p>\n\n\n\n<p>Acest proces este rezumat \u00een urm\u0103toarele etape:. <\/p>\n\n\n\n<p>1) stocarea \u00een lan\u021b. <\/p>\n\n\n\n<p>2) semn\u0103tura digital\u0103. <\/p>\n\n\n\n<p>3) consensul de angajament pentru a ad\u0103uga un nou bloc la stocarea global\u0103 \u00een lan\u021b. <\/p>\n\n\n\n<p>Tehnologia Blockchain are un set de tehnici populare de securitate, cum ar fi lan\u021bul de hash, arborele Merkle, semn\u0103tura digital\u0103, cu mecanisme de consens; blockchain-ul Bitcoin poate preveni at\u00e2t problema dublei cheltuieli Bitcoin, c\u00e2t \u0219i oprirea modific\u0103rii retrospective a oric\u0103rei tranzac\u021bii de date \u00eentr-un bloc dup\u0103 ce blocul a fost angajat cu succes \u00een Blockchain.<\/p>\n\n\n\n<p>Tehnica de securitate a stoc\u0103rii \u00een lan\u021b.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"chained-storage-security-technique\"><strong>Indicatorul de hash \u0219i arborele Merkle sunt cele mai utilizate tehnici de stocare \u00een lan\u021b pentru implementarea blockchain-ului \u00een Bitcoin. Indicatorul de hash este un hash criptografic al datelor care indic\u0103 loca\u021bia unde sunt stocate datele. Folosind indicatori de hash, blockchain-ul leag\u0103 blocurile de date \u00eempreun\u0103, fiecare bloc indic\u00e2nd adresa unde sunt stocate datele din blocul predecesor. Utilizatorii pot verifica public hash-ul datelor stocate pentru a demonstra c\u0103 nu au fost modificate.<\/strong><\/h2>\n\n\n<p>Dac\u0103 un hacker \u00eencearc\u0103 s\u0103 schimbe datele din orice bloc din \u00eentregul lan\u021b, ar trebui s\u0103 schimbe indicatorii de hash ai tuturor blocurilor anterioare. \u00cen cele din urm\u0103, hackerul ar trebui s\u0103 opreasc\u0103 manipularea deoarece nu ar putea falsifica datele din capul lan\u021bului, care este generat ini\u021bial odat\u0103 ce sistemul este construit. Dac\u0103 \u00eencearc\u0103, atacul cibernetic ar fi descoperit deoarece lan\u021bul are proprietatea de rezisten\u021b\u0103 la manipulare. Utilizatorii pot reveni la un bloc special \u0219i \u00eel pot verifica de la \u00eenceputul lan\u021bului.<\/p>\n\n\n\n<p>Arborele Merkle este un arbore de c\u0103utare binar cu noduri legate \u00eentre ele folosind indicatori de hash. Este o alt\u0103 structur\u0103 de date util\u0103 folosit\u0103 pentru a construi un blockchain. Nodurile sunt grupate \u00een grupuri disjuncte, fiecare pereche de noduri de nivel inferior fiind grupat\u0103 \u00eentr-unul la nivelul p\u0103rinte. Acest lucru \u00eempiedic\u0103 datele s\u0103 fie modificate prin traversarea indicatorilor de hash c\u0103tre orice nod din arbore.<\/p>\n\n\n\n<p>C\u00e2nd un atac cibernetic \u00eencearc\u0103 s\u0103 manipuleze datele \u00eentr-un nod copil, acesta schimb\u0103 valoarea hash a nodului s\u0103u p\u0103rinte. Chiar dac\u0103 hackerul continu\u0103 s\u0103 manipuleze nodul superior, trebuie s\u0103 schimbe toate nodurile pe drumul de jos \u00een sus. Detectarea manipul\u0103rii este u\u0219oar\u0103 deoarece indicatorul de hash al nodului r\u0103d\u0103cin\u0103 nu se potrive\u0219te cu indicatorul de hash stocat. Un avantaj al arborelui Merkle este c\u0103 poate testa eficient \u0219i concis apartenen\u021ba unui nod de date prin afi\u0219area acestui nod de date \u0219i a tuturor nodurilor sale ancestrale pe drumul lor p\u00e2n\u0103 la nodul r\u0103d\u0103cin\u0103. Apartenen\u021ba \u00een arborele Merkle poate fi verificat\u0103 \u00een timp logaritmic prin calcularea hash-urilor pe traseu \u0219i verificarea valorii hash fa\u021b\u0103 de r\u0103d\u0103cin\u0103.<\/p>\n\n\n\n<p>Tehnica de securitate a semn\u0103turii digitale.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"digital-signature-security-technique\"><strong>Cu aceast\u0103 tehnic\u0103 de securitate, validitatea datelor este c\u0103utat\u0103 prin utilizarea unui algoritm criptografic. Este o schem\u0103 pentru a verifica dac\u0103 datele nu au fost manipulate. Exist\u0103 trei componente fundamentale care formuleaz\u0103 o schem\u0103 de semn\u0103tur\u0103 digital\u0103.<\/strong><\/h2>\n\n\n<p>Prima component\u0103 este algoritmul de generare a cheilor, care creeaz\u0103 dou\u0103 chei: una este folosit\u0103 pentru a semna mesaje \u0219i a le p\u0103stra private, numit\u0103 cheia privat\u0103, iar cealalt\u0103 este f\u0103cut\u0103 disponibil\u0103 public, numit\u0103 cheia public\u0103. Cheia public\u0103 este folosit\u0103 pentru a valida dac\u0103 semn\u0103tura mesajului este semnat\u0103 cu cheia privat\u0103.<\/p>\n\n\n\n<p>A doua component\u0103 este algoritmul de semn\u0103tur\u0103, care produce un semnal \u00een mesajul de intrare sus\u021binut de utilizarea cheii private date.<\/p>\n\n\n\n<p>A treia component\u0103 este.<\/p>\n\n\n\n<p>algoritmul de verificare <a href=\"https:\/\/www.khanacademy.org\/computing\/ap-computer-science-principles\/algorithms-101\/evaluating-algorithms\/a\/verifying-an-algorithm\" target=\"_blank\" rel=\"noreferrer noopener\">, care ia o semn\u0103tur\u0103, un mesaj \u0219i o cheie public\u0103 ca intrare \u0219i valideaz\u0103 semn\u0103tura mesajului folosind cheia public\u0103. Returneaz\u0103 o valoare boolean\u0103.<\/a>, Un algoritm de semn\u0103tur\u0103 digital\u0103 fiabil \u0219i securizat este considerat bine definit atunci c\u00e2nd satisface dou\u0103 propriet\u0103\u021bi. Prima proprietate este c\u0103 semn\u0103turile valide sunt verificabile. A doua proprietate este c\u0103 semn\u0103turile sunt existen\u021bial neforjabile.<\/p>\n\n\n\n<p>Algoritmul de Semn\u0103tur\u0103 Digital\u0103 cu Curbe Eliptice. <a href=\"https:\/\/www.hypr.com\/security-encyclopedia\/elliptic-curve-digital-signature-algorithm#:~:text=The%20Elliptic%20Curve%20Digital%20Signature%20Algorithm%20(ECDSA)%20is%20a%20Digital,public%20key%20cryptography%20(PKC).\" target=\"_blank\" rel=\"noreferrer noopener\">(ECDSA) adoptat de Bitcoin este un exemplu de astfel de algoritm.<\/a> Consensul de angajament pentru a ad\u0103uga un nou bloc la stocarea global\u0103 \u00een lan\u021b.<\/p>\n\n\n\n<p><strong>C\u00e2nd un nou bloc este trimis c\u0103tre re\u021bea, fiecare nod poate ad\u0103uga acel bloc la copia sa a registrului sau \u00eel poate ignora. Consensul este folosit pentru a g\u0103si c\u0103 majoritatea re\u021belei este de acord cu o singur\u0103 actualizare de stare pentru a asigura extinderea registrului sau a Blockchain-ului, prevenind astfel atacurile cibernetice.<\/strong><\/p>\n\n\n\n<p>\u00cen mod specific, deoarece Blockchain-ul este un registru global vast partajat, oricine \u00eel poate actualiza. Nu se pierde din vedere faptul c\u0103 un atac cibernetic ar putea avea loc atunci c\u00e2nd un nod decide s\u0103 modifice starea copiei registrului sau c\u00e2nd mai multe noduri \u00eencearc\u0103 o manipulare.<\/p>\n\n\n\n<p>De exemplu, dac\u0103 utilizatorul A a trimis 10 Bitcoins utilizatorului B din portofelul s\u0103u, ar dori s\u0103 se asigure c\u0103 nimeni din re\u021bea nu poate modifica con\u021binutul tranzac\u021biei \u0219i s\u0103 schimbe 10 Bitcoins \u00een 100 Bitcoins. \u00cen aceast\u0103 ordine de idei, pentru a permite lan\u021bului de blocuri s\u0103 func\u021bioneze la scar\u0103 global\u0103 cu o garan\u021bie de securitate \u0219i corectitudine, registrul public partajat are nevoie de un algoritm de consens eficient \u0219i sigur, care trebuie s\u0103 asigure c\u0103:.<\/p>\n\n\n\n<p>toate nodurile men\u021bin simultan un lan\u021b de blocuri identic, \u0219i<\/p>\n\n\n\n<p>nu depinde de autoritatea central\u0103 pentru a preveni atacatorii cibernetici s\u0103 perturbe procesul de coordonare a ajungerii la un consens.<br>Pe scurt.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"in-short\"><br>Majoritatea participan\u021bilor la re\u021bea trebuie s\u0103 aprobe fiecare mesaj transmis \u00eentre noduri printr-un acord bazat pe consens. \u00cen plus, re\u021beaua trebuie s\u0103 fie rezistent\u0103 la e\u0219ecuri par\u021biale, cum ar fi atunci c\u00e2nd un grup de noduri este r\u0103uvoitor sau c\u00e2nd un mesaj \u00een tranzit este corupt. Pentru aceasta, un mecanism de consens bun folosit \u00een Blockchain trebuie s\u0103 respecte dou\u0103 propriet\u0103\u021bi: persisten\u021ba \u0219i vivacitatea. Adic\u0103, dac\u0103 un nod din re\u021bea indic\u0103 faptul c\u0103 o tranzac\u021bie este \u00een starea \u201estabil\u0103\u201d, atunci celelalte noduri din re\u021bea ar trebui s\u0103 o raporteze \u0219i ele ca fiind stabil\u0103 dac\u0103 sunt \u00eentrebate \u0219i r\u0103spund sincer.<\/h2>\n\n\n<p>\u00cen a doua parte a acestui articol, v\u0103 vom spune mai multe despre propriet\u0103\u021bile \u0219i tehnicile de securitate \u0219i confiden\u021bialitate ale Blockchain-ului.<\/p>\n\n\n\n<p>Descoperi\u021bi poten\u021bialul tehnologiei Blockchain pentru dezvoltarea socio-economic\u0103 Afla\u021bi cum construie\u0219te \u00eencrederea, reduce costurile \u0219i multe altele.<\/p>","protected":false},"excerpt":{"rendered":"<p>\"Blockchain\" este un termen utilizat pentru a se referi la o tehnologie de consens descentralizat\u0103 care de\u021bine un poten\u021bial considerabil pentru dezvoltarea de noi baze pentru dezvoltarea socio-economic\u0103 \u0219i descentralizarea securit\u0103\u021bii \u00een zonele emergente. Datorit\u0103... <a class=\"more-link\" href=\"https:\/\/securitybriefing.net\/ro\/lant-de-blocuri\/confidentialitate-si-securitate-ca-principale-caracteristici-ale-blockchain-partea-1\/\">Continue reading <span class=\"screen-reader-text\">Confiden\u021bialitatea \u0219i securitatea ca principale caracteristici ale Blockchain: Partea 1<\/span><\/a><\/p>","protected":false},"author":3,"featured_media":1533,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blockchain","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Potential of Blockchain Technology Part 1 - Securitybriefing<\/title>\n<meta name=\"description\" content=\"Discover the potential of Blockchain technology for socio-economic development Learn how it builds trust, reduces costs, and more.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/securitybriefing.net\/ro\/lant-de-blocuri\/confidentialitate-si-securitate-ca-principale-caracteristici-ale-blockchain-partea-1\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Potential of Blockchain Technology Part 1 - 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