{"id":37245,"date":"2026-05-29T09:54:35","date_gmt":"2026-05-29T09:54:35","guid":{"rendered":"https:\/\/volity.io\/non-classifiee\/what-is-proof-of-work\/"},"modified":"2026-05-29T09:55:25","modified_gmt":"2026-05-29T09:55:25","slug":"what-is-proof-of-work","status":"publish","type":"post","link":"https:\/\/volity.io\/fr\/glossaire\/what-is-proof-of-work\/","title":{"rendered":"Qu&rsquo;est-ce que la preuve de travail (Proof of Work)"},"content":{"rendered":"<h2>Comment \u00e7a fonctionne<\/h2>\n<p>Les mineurs se font concurrence pour trouver un nombre qui, combin\u00e9 \u00e0 l&rsquo;en-t\u00eate du prochain bloc et hash\u00e9, produit un r\u00e9sultat sous la cible de difficult\u00e9 du r\u00e9seau. Le premier \u00e0 trouver un tel nombre diffuse le bloc. Les autres n\u0153uds v\u00e9rifient la solution instantan\u00e9ment. Le mineur r\u00e9ussi re\u00e7oit la r\u00e9compense de bloc plus tous les frais de transaction. Le r\u00e9seau ajuste la difficult\u00e9 tous les 2 016 blocs (environ toutes les deux semaines pour Bitcoin) pour maintenir le temps de bloc \u00e0 environ 10 minutes.<\/p>\n<h2>Exemple<\/h2>\n<p>Le r\u00e9seau Bitcoin traite actuellement environ 600 quintillions de hash par seconde collectivement. Un seul ASIC haut de gamme \u00e0 100 t\u00e9rahash par seconde contribue \u00e0 peu pr\u00e8s 1 partie sur 6 millions du total. Le co\u00fbt \u00e9nerg\u00e9tique d&rsquo;attaquer le r\u00e9seau (51 pour cent du taux de hash) demande d&rsquo;acqu\u00e9rir du mat\u00e9riel et de l&rsquo;\u00e9lectricit\u00e9 valant des dizaines de milliards de dollars. Ce co\u00fbt est la garantie de s\u00e9curit\u00e9.<\/p>\n<h2>Pourquoi c&rsquo;est important<\/h2>\n<p>La preuve de travail a rendu Bitcoin et l&rsquo;industrie crypto au sens large possibles. Son mod\u00e8le de s\u00e9curit\u00e9 est le plus \u00e9prouv\u00e9 du secteur : Bitcoin tourne en continu depuis janvier 2009 sans attaque r\u00e9ussie \u00e0 51 pour cent. Les compromis sont la consommation \u00e9nerg\u00e9tique (estim\u00e9e \u00e0 0,5 pour cent de l&rsquo;\u00e9lectricit\u00e9 mondiale pour Bitcoin seul) et la pression de centralisation mat\u00e9rielle alors que la fabrication d&rsquo;ASIC se concentre. Les r\u00e9seaux en preuve d&rsquo;enjeu ont fait un choix diff\u00e9rent sur ces compromis.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Comment \u00e7a fonctionne Les mineurs se font concurrence pour trouver un nombre qui, combin\u00e9 \u00e0 l&rsquo;en-t\u00eate du prochain bloc et hash\u00e9, produit [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":37944,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"custom_schema":"","footnotes":""},"categories":[258],"tags":[],"class_list":["post-37245","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossaire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Qu&#039;est-ce que la preuve de travail (Proof of Work)<\/title>\n<meta name=\"description\" content=\"La preuve de travail s\u00e9curise une blockchain en faisant d\u00e9penser de l&#039;\u00e9nergie computationnelle. 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