{"id":165244,"date":"2025-08-28T15:30:00","date_gmt":"2025-08-28T15:30:00","guid":{"rendered":"https:\/\/cryptonews.com\/fr\/?p=165244"},"modified":"2025-08-28T15:30:00","modified_gmt":"2025-08-28T15:30:00","slug":"monero-renforce-attaque-51-qubic-reseau-contre-attaque","status":"publish","type":"post","link":"https:\/\/cryptonews.com\/fr\/news\/monero-renforce-attaque-51-qubic-reseau-contre-attaque\/","title":{"rendered":"Monero renforc\u00e9 : apr\u00e8s l\u2019attaque des 51\u202f% par Qubic, le r\u00e9seau contre-attaque"},"content":{"rendered":"<p>Monero (XMR), la crypto embl\u00e9matique de la confidentialit\u00e9, a subi d\u00e9but ao\u00fbt une attaque historique men\u00e9e par le projet Qubic. Un choc pour la communaut\u00e9, qui a pourtant su r\u00e9agir rapidement. Entre fuite des mineurs, nouvelles pistes de s\u00e9curit\u00e9 et d\u00e9bat sur l\u2019avenir du minage, l\u2019\u00e9cosyst\u00e8me Monero montre qu\u2019il ne se laisse pas abattre.<\/p><h2 class=\"wp-block-heading\"><span id=\"h-monero-vise-par-une-attaque-a-51-que-s-est-il-passe\">Monero vis\u00e9 par une attaque \u00e0 51\u202f% : que s\u2019est-il pass\u00e9<\/span><\/h2><span class=\"replacer\"><\/span><p>D\u00e9but ao\u00fbt 2025, Qubic a annonc\u00e9 avoir pris le contr\u00f4le de plus de 51\u202f% du minage de Monero. Tr\u00e8s vite, <strong>\u00e7a s\u2019est vu sur la blockchain<\/strong> : six blocs ont \u00e9t\u00e9 modifi\u00e9s, et des dizaines d\u2019autres sont devenus invalides. Ce genre d\u2019attaque, appel\u00e9e \u00ab selfish mining \u00bb, consiste \u00e0 miner des blocs en cachette, puis \u00e0 publier une version plus longue de la cha\u00eene pour prendre le dessus.<\/p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"553\" src=\"https:\/\/cimg.co\/wp-content\/uploads\/sites\/3\/2025\/08\/28131120\/Monero-1024x553.jpg\" alt=\"\" class=\"wp-image-165253\" srcset=\"https:\/\/cimg.co\/wp-content\/uploads\/sites\/3\/2025\/08\/28131120\/Monero-1024x553.jpg 1024w, https:\/\/cimg.co\/wp-content\/uploads\/sites\/3\/2025\/08\/28131120\/Monero-300x162.jpg 300w, https:\/\/cimg.co\/wp-content\/uploads\/sites\/3\/2025\/08\/28131120\/Monero-768x415.jpg 768w, https:\/\/cimg.co\/wp-content\/uploads\/sites\/3\/2025\/08\/28131120\/Monero-1536x830.jpg 1536w, https:\/\/cimg.co\/wp-content\/uploads\/sites\/3\/2025\/08\/28131120\/Monero-2048x1107.jpg 2048w, https:\/\/cimg.co\/wp-content\/uploads\/sites\/3\/2025\/08\/28131120\/Monero-450x243.jpg 450w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\"><\/figure><p>Certains experts pensent que ce n\u2019\u00e9tait peut-\u00eatre qu\u2019un simple coup de chance. Mais beaucoup ont tout de suite eu des doutes. Le fait <strong>qu\u2019un seul acteur puisse contr\u00f4ler le r\u00e9seau<\/strong>, m\u00eame temporairement, a relanc\u00e9 les inqui\u00e9tudes sur une possible centralisation, m\u00eame dans un syst\u00e8me cens\u00e9 \u00eatre accessible \u00e0 tous comme Monero.<\/p><h2 class=\"wp-block-heading\"><span id=\"h-la-riposte-de-la-communaute-monero\">La riposte de la communaut\u00e9 Monero<\/span><\/h2><span class=\"replacer\"><\/span><p>La communaut\u00e9 a r\u00e9agi tr\u00e8s vite. En quelques jours, beaucoup de mineurs <strong>ont quitt\u00e9 les groupes li\u00e9s \u00e0 Qubic <\/strong>pour aller vers d\u2019autres, plus ind\u00e9pendants, comme P2Pool. Gr\u00e2ce \u00e0 \u00e7a, Qubic a perdu une grosse partie de son pouvoir, et le r\u00e9seau Monero est redevenu plus s\u00fbr.<\/p><p>En parall\u00e8le, les d\u00e9veloppeurs ont commenc\u00e9 \u00e0 r\u00e9fl\u00e9chir <strong>\u00e0 des solutions durables<\/strong> pour <a href=\"https:\/\/cryptonews.com\/fr\/news\/malware-discret-mine-monero-3-500-sites-a-votre-insu\/\">mieux prot\u00e9ger Monero \u00e0 l\u2019avenir<\/a>. <\/p><p>Pour \u00e9viter que \u00e7a se reproduise, plusieurs solutions sont en cours de r\u00e9flexion. L\u2019une d\u2019elles s\u2019inspire de la m\u00e9thode ChainLocks, <a href=\"https:\/\/cryptonews.com\/fr\/news\/3-tokens-ia-reveiller-prochain-x100\/\">d\u00e9j\u00e0 utilis\u00e9e par la crypto Dash<\/a>. Ce syst\u00e8me permet de <strong>verrouiller les blocs une fois valid\u00e9s<\/strong>, ce qui emp\u00eache un attaquant de les modifier, m\u00eame s\u2019il a beaucoup de puissance de calcul.<\/p><p>Enfin, une mise \u00e0 jour majeure est en pr\u00e9paration : <strong>le protocole Full Chain Membership Proofs (FCMP)<\/strong>. D\u00e9j\u00e0 test\u00e9 sur un r\u00e9seau secondaire, il promet d\u2019am\u00e9liorer \u00e0 la fois la scalabilit\u00e9, la confidentialit\u00e9 et la r\u00e9sistance aux attaques \u00e0 51\u202f%. <\/p><figure class=\"wp-block-embed is-type-rich is-provider-twitter wp-block-embed-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Full-Chain Membership Proofs (FCMP++) development is progressing well, with the first testnet (alpha stressnet) going live soon! <a href=\"https:\/\/t.co\/Ov4P748Rsj\">https:\/\/t.co\/Ov4P748Rsj<\/a><\/p>&mdash; Monero (XMR) (@monero) <a href=\"https:\/\/twitter.com\/monero\/status\/1960413975742754919?ref_src=twsrc%5Etfw\">August 26, 2025<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure><h2 class=\"wp-block-heading\"><span id=\"h-un-coup-dur-pour-monero-et-pour-son-prix\">Un coup dur pour Monero\u2026 et pour son prix<\/span><\/h2><span class=\"replacer\"><\/span><p>L\u2019attaque n\u2019a pas seulement eu des cons\u00e9quences techniques. Elle a aussi <a href=\"https:\/\/cryptonews.com\/fr\/news\/cardano-ada-decolle-pendant-marche-souffle\/\">fortement secou\u00e9 le march\u00e9<\/a>. En 24\u202fh, le cours du XMR a chut\u00e9 de plus de 6\u202f%, <strong>avant de perdre jusqu\u2019\u00e0 16\u202f% en quelques jours<\/strong>. L\u2019incertitude a pouss\u00e9 certains exchanges comme Kraken \u00e0 suspendre temporairement les d\u00e9p\u00f4ts en XMR, en exigeant davantage de confirmations pour \u00e9viter les doubles d\u00e9penses.<\/p><p>Ces r\u00e9actions traduisent une perte de confiance passag\u00e8re. Mais elles ont aussi mis en lumi\u00e8re <strong>la fragilit\u00e9 per\u00e7ue de certains r\u00e9seaux Proof of Work<\/strong>, m\u00eame parmi les plus anciens. Le d\u00e9bat sur la s\u00e9curit\u00e9, la d\u00e9centralisation et l\u2019avenir du minage CPU a pris une nouvelle ampleur dans la communaut\u00e9 crypto.<\/p><h2 class=\"wp-block-heading\"><span id=\"h-qubic-un-stress-test-ou-une-operation-de-com\">Qubic : un \u201cstress test\u201d ou une op\u00e9ration de com\u202f?<\/span><\/h2><span class=\"replacer\"><\/span><p>Le projet Qubic, dirig\u00e9 par Sergey Ivancheglo (ex-cofondateur d\u2019IOTA), a justifi\u00e9 son action en la pr\u00e9sentant comme un \u201cstress test\u201d volontaire. L\u2019id\u00e9e, selon eux, <strong>\u00e9tait de d\u00e9montrer les failles du syst\u00e8me de minage de Monero<\/strong>, tout en incitant les d\u00e9veloppeurs \u00e0 renforcer le protocole.<\/p><p>Mais tout le monde ne voit pas les choses sous cet angle. En r\u00e9alit\u00e9, Qubic semble avoir surtout profit\u00e9 de cet \u00e9pisode pour <strong>faire parler de son propre mod\u00e8le \u00e9conomique<\/strong>. Les XMR r\u00e9cup\u00e9r\u00e9s par Qubic ont \u00e9t\u00e9 \u00e9chang\u00e9s contre des USDT, puis utilis\u00e9s pour acheter et br\u00fbler leur propre token, QUBIC. R\u00e9sultat : le prix de leur token a grimp\u00e9, leurs validateurs ont \u00e9t\u00e9 bien r\u00e9compens\u00e9s, et tout le monde a parl\u00e9 d\u2019eux. \u00c7a ressemble beaucoup \u00e0 une strat\u00e9gie marketing bien pens\u00e9e.<\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"><p>Source : <a href=\"https:\/\/x.com\/monero\/status\/1960413975742754919\">Monero<\/a><\/p><hr class=\"wp-block-separator has-alpha-channel-opacity\"><p>Pour aller plus loin sur le sujet : <\/p><ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/cryptonews.com\/fr\/news\/malware-discret-mine-monero-3-500-sites-a-votre-insu\/\">Cryptojacking 2.0 : un malware discret mine du Monero sur 3 500 sites \u00e0 votre insu<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cryptonews.com\/fr\/news\/cardano-ada-decolle-pendant-marche-souffle\/\">Cardano (ADA) d\u00e9colle pendant que le march\u00e9 souffle<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cryptonews.com\/fr\/news\/3-tokens-ia-reveiller-prochain-x100\/\">3 tokens IA qui viennent de se r\u00e9veiller : le prochain x100 ?<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Monero (XMR), la crypto embl\u00e9matique de la confidentialit\u00e9, a subi d\u00e9but ao\u00fbt une attaque historique men\u00e9e par le projet Qubic. Un choc pour la communaut\u00e9, qui a pourtant su r\u00e9agir rapidement. Entre fuite des mineurs, nouvelles pistes de s\u00e9curit\u00e9 et d\u00e9bat sur l\u2019avenir du minage, l\u2019\u00e9cosyst\u00e8me Monero montre qu\u2019il ne se laisse pas abattre.Monero vis\u00e9 [&hellip;]<\/p>\n","protected":false},"author":271,"featured_media":165255,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8,9,1],"tags":[],"editors":[2551],"class_list":["post-165244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-altcoin-news","category-blockchain-news","category-news","editors-julien-leroy"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Monero renforc\u00e9 apr\u00e8s l\u2019attaque des 51\u202f% par Qubic<\/title>\n<meta name=\"description\" content=\"Monero (XMR) a subi d\u00e9but ao\u00fbt une attaque 51% men\u00e9e par le projet Qubic. 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