{"id":2307,"date":"2026-04-25T04:03:23","date_gmt":"2026-04-25T04:03:23","guid":{"rendered":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/"},"modified":"2026-04-25T04:03:23","modified_gmt":"2026-04-25T04:03:23","slug":"le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin","status":"publish","type":"post","link":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/","title":{"rendered":"Le test quantique brise la cl\u00e9 ECC et soul\u00e8ve de nouveaux probl\u00e8mes de s\u00e9curit\u00e9 Bitcoin"},"content":{"rendered":"<p><b><i>Un chercheur casse la cl\u00e9 ECC \u00e0 l\u2019aide de mat\u00e9riel quantique, soulevant des inqui\u00e9tudes concernant la s\u00e9curit\u00e9 du Bitcoin et appelant \u00e0 une transition plus rapide vers des syst\u00e8mes de protection post-quantiques.<\/i><\/b><\/p>\n<p><span style=\"font-weight: 400\">Une perc\u00e9e dans l\u2019informatique quantique a soulev\u00e9 de graves pr\u00e9occupations en mati\u00e8re de cybers\u00e9curit\u00e9 dans le monde entier. Giancarlo Lelli, un chercheur ind\u00e9pendant, a r\u00e9cemment d\u00e9chiffr\u00e9 une cl\u00e9 \u00e0 courbe elliptique de 15 bits avec du mat\u00e9riel quantique public. De plus, cette r\u00e9alisation lui a valu une r\u00e9compense de 1 Bitcoin et une attention mondiale.<\/span><\/p>\n<h2><b>La perc\u00e9e quantique montre de r\u00e9els progr\u00e8s dans les attaques cryptographiques<\/b><\/h2>\n<p><span style=\"font-weight: 400\">L&rsquo;exp\u00e9rience faisait partie d&rsquo;un d\u00e9fi lanc\u00e9 par<\/span><a href=\"https:\/\/x.com\/projecteleven\/status\/2047661990605156796?s=20\"><span style=\"font-weight: 400\">Projet onze<\/span><\/a><span style=\"font-weight: 400\">. Le groupe a d\u00e9cern\u00e9 le prix Q-Day \u00e0 Lelli pour avoir accompli cette t\u00e2che avec succ\u00e8s. Il s\u2019agit de la plus grande d\u00e9monstration publique d\u2019une attaque quantique contre la cryptographie \u00e0 courbe elliptique.<\/span><\/p>\n<p><b><i>Lecture connexe\u00a0:<\/i><\/b><a href=\"https:\/\/www.livebitcoinnews.com\/charles-hoskinson-takes-aim-at-bitcoins-quantum-resistance-strategy\/\"><b><i>Le d\u00e9bat sur la strat\u00e9gie quantique Bitcoin s&rsquo;intensifie<\/i><\/b><\/a><\/p>\n<p><span style=\"font-weight: 400\">La cryptographie \u00e0 courbe elliptique (ECC) est utilis\u00e9e pour s\u00e9curiser de nombreux syst\u00e8mes blockchain. Bitcoin et Ethereum utilisent cette m\u00e9thode pour les signatures, par exemple. Ainsi, d\u00e9chiffrer une petite cl\u00e9 ECC est une \u00e9tape vers de meilleures attaques quantiques.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Lelli a appliqu\u00e9 un algorithme quantique appel\u00e9 algorithme de Shor. Cet algorithme est destin\u00e9 au probl\u00e8me du logarithme discret \u00e0 courbe elliptique (ECDLP), qui s\u00e9curise les portefeuilles de crypto-monnaie. Cela lui a permis d&rsquo;obtenir une cl\u00e9 priv\u00e9e \u00e0 partir d&rsquo;une cl\u00e9 publique.<\/span><\/p>\n<p><span style=\"font-weight: 400\">M\u00eame si l\u2019exp\u00e9rience a \u00e9t\u00e9 men\u00e9e sur une cl\u00e9 de 15 bits, elle est significative. L&rsquo;espace cl\u00e9 contenait 32 767 cl\u00e9s possibles qui ont \u00e9t\u00e9 recherch\u00e9es. En cons\u00e9quence, cela est d\u00e9sormais consid\u00e9r\u00e9 comme une am\u00e9lioration par rapport aux tests pr\u00e9c\u00e9dents.<\/span><\/p>\n<p><span style=\"font-weight: 400\">En effet, un test r\u00e9alis\u00e9 en 2025 n\u2019a crack\u00e9 qu\u2019une cl\u00e9 de 6 bits. Cette nouvelle exp\u00e9rience est donc 512 fois plus sophistiqu\u00e9e. Cela d\u00e9montre l\u2019am\u00e9lioration rapide de la technologie quantique.<\/span><\/p>\n<h2><b>Les risques croissants renforcent le besoin d\u2019une s\u00e9curit\u00e9 post-quantique<\/b><\/h2>\n<p><span style=\"font-weight: 400\">Cependant, il est encore beaucoup plus difficile de casser une cl\u00e9 de 256 bits. Toutefois, des \u00e9tudes r\u00e9centes sugg\u00e8rent que l\u2019\u00e9cart se r\u00e9duit rapidement. Les estimations montrent d\u00e9sormais qu\u2019environ 500\u00a0000 qubits pourraient \u00eatre n\u00e9cessaires pour une telle attaque.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Certaines recherches plus r\u00e9centes sugg\u00e8rent m\u00eame que l&rsquo;exigence pourrait encore baisser \u00e0 10 000 qubits. On pense donc que le probl\u00e8me devient davantage un probl\u00e8me d\u2019ing\u00e9nierie. Cela pourrait permettre de futures attaques.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Il y a actuellement 6,9 millions de Bitcoins stock\u00e9s dans des portefeuilles dot\u00e9s de cl\u00e9s publiques. Ces portefeuilles pourraient \u00eatre menac\u00e9s si les attaques quantiques devenaient plus efficaces. En cons\u00e9quence, l\u2019industrie de la cryptographie surveille de pr\u00e8s ces \u00e9volutions.<\/span><\/p>\n<p><span style=\"font-weight: 400\">De plus, la valeur des actifs prot\u00e9g\u00e9s par l\u2019ECC d\u00e9passe les 2\u00a0500 milliards de dollars dans le monde. Cela comprend de nombreux<\/span><a href=\"https:\/\/www.livebitcoinnews.com\/ethereum-roadmap-pushes-faster-finality-zk-evm-and-quantum-resistance\/\"><span style=\"font-weight: 400\">r\u00e9seaux blockchain<\/span><\/a><span style=\"font-weight: 400\">. Ainsi, les menaces ne se limitent pas \u00e0 une seule cryptomonnaie.<\/span><\/p>\n<p><span style=\"font-weight: 400\">L\u2019industrie technologique prend \u00e9galement ces risques au s\u00e9rieux. D\u2019autres se pr\u00e9parent d\u00e9j\u00e0 \u00e0 des syst\u00e8mes \u00e0 s\u00e9curit\u00e9 quantique. Par exemple, Google pr\u00e9voit d\u2019\u00eatre \u00e0 s\u00e9curit\u00e9 quantique d\u2019ici 2029.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Aujourd\u2019hui, les experts insistent sur la n\u00e9cessit\u00e9 d\u2019une cryptographie post-quantique. Il s\u2019agit d\u2019une cryptographie r\u00e9sistante aux ordinateurs quantiques. Ainsi, les d\u00e9veloppeurs devront probablement mettre \u00e0 niveau les syst\u00e8mes blockchain dans un avenir proche.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Pendant ce temps, les chercheurs travaillent sur de nouvelles probl\u00e9matiques dans ce domaine. Project Eleven cherche d\u00e9j\u00e0 \u00e0 effectuer davantage de tests utilisant l\u2019intelligence artificielle et l\u2019analyse quantique. Ces efforts visent \u00e0 mieux comprendre et r\u00e9duire les risques futurs.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Dans l\u2019ensemble, la rupture de cl\u00e9 de 15 bits montre les progr\u00e8s de l\u2019informatique quantique. M\u00eame si des attaques \u00e0 grande \u00e9chelle ne sont pas encore r\u00e9alisables, la trajectoire est claire. Par cons\u00e9quent, une pr\u00e9paration pr\u00e9coce et des syst\u00e8mes de s\u00e9curit\u00e9 plus solides seront essentiels pour l\u2019avenir des march\u00e9s de la cryptographie.<\/span><\/p>\n<p><!-- source_url: https:\/\/www.livebitcoinnews.com\/quantum-test-breaks-ecc-key-raises-new-bitcoin-security-concerns\/ --><\/p>\n<p><em>Source : <a href=\"https:\/\/www.livebitcoinnews.com\/quantum-test-breaks-ecc-key-raises-new-bitcoin-security-concerns\/\" rel=\"nofollow noopener\" target=\"_blank\">Live Bitcoin News<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un chercheur casse la cl\u00e9 ECC \u00e0 l\u2019aide de mat\u00e9riel quantique, soulevant des inqui\u00e9tudes concernant la s\u00e9curit\u00e9 du Bitcoin et appelant \u00e0 une transition plus rapide vers des syst\u00e8mes de protection post-quantiques. Une perc\u00e9e dans l\u2019informatique quantique a soulev\u00e9 de graves pr\u00e9occupations en mati\u00e8re de cybers\u00e9curit\u00e9 dans le monde entier. Giancarlo Lelli, un chercheur ind\u00e9pendant, [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":2306,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2307","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bitcoin-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le test quantique brise la cl\u00e9 ECC et soul\u00e8ve de nouveaux probl\u00e8mes de s\u00e9curit\u00e9 Bitcoin - France Live Bitcoin News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le test quantique brise la cl\u00e9 ECC et soul\u00e8ve de nouveaux probl\u00e8mes de s\u00e9curit\u00e9 Bitcoin - France Live Bitcoin News\" \/>\n<meta property=\"og:description\" content=\"Un chercheur casse la cl\u00e9 ECC \u00e0 l\u2019aide de mat\u00e9riel quantique, soulevant des inqui\u00e9tudes concernant la s\u00e9curit\u00e9 du Bitcoin et appelant \u00e0 une transition plus rapide vers des syst\u00e8mes de protection post-quantiques. 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Une perc\u00e9e dans l\u2019informatique quantique a soulev\u00e9 de graves pr\u00e9occupations en mati\u00e8re de cybers\u00e9curit\u00e9 dans le monde entier. Giancarlo Lelli, un chercheur ind\u00e9pendant, [&hellip;]","og_url":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/","og_site_name":"France Live Bitcoin News","article_published_time":"2026-04-25T04:03:23+00:00","author":"frenchlbn","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"frenchlbn","Dur\u00e9e de lecture estim\u00e9e":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/#article","isPartOf":{"@id":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/"},"author":{"name":"frenchlbn","@id":"https:\/\/global.livebitcoinnews.com\/fr\/#\/schema\/person\/cf8f1f85189588768e507a2eb234cba8"},"headline":"Le test quantique brise la cl\u00e9 ECC et soul\u00e8ve de nouveaux probl\u00e8mes de s\u00e9curit\u00e9 Bitcoin","datePublished":"2026-04-25T04:03:23+00:00","mainEntityOfPage":{"@id":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/"},"wordCount":724,"commentCount":0,"image":{"@id":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/#primaryimage"},"thumbnailUrl":"https:\/\/global.livebitcoinnews.com\/fr\/wp-content\/uploads\/sites\/4\/2026\/04\/BTC_News__Bitcoin_May_Have_Just_2_Years_of_Safety_From_Quantum_Hacks-2-1.png","articleSection":["Bitcoin News"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/","url":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/04\/25\/le-test-quantique-brise-la-cle-ecc-et-souleve-de-nouveaux-problemes-de-securite-bitcoin\/","name":"Le test quantique brise la cl\u00e9 ECC et soul\u00e8ve de nouveaux probl\u00e8mes de s\u00e9curit\u00e9 Bitcoin - 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