{"id":837,"date":"2026-08-21T09:22:19","date_gmt":"2026-08-21T09:22:19","guid":{"rendered":"https:\/\/www.arxelo.com\/uncategorized\/blockchains-next-security-problem-is-economic-rather-than-technical\/"},"modified":"2026-08-21T09:22:19","modified_gmt":"2026-08-21T09:22:19","slug":"le-prochain-probleme-de-securite-des-blockchains-sera-dordre-economique-plutot-que-technique","status":"publish","type":"post","link":"https:\/\/www.arxelo.com\/fr\/blockchain-technology\/blockchain-security\/blockchains-next-security-problem-is-economic-rather-than-technical\/","title":{"rendered":"Le prochain probl\u00e8me de s\u00e9curit\u00e9 de la blockchain est d'ordre \u00e9conomique, plut\u00f4t que technique"},"content":{"rendered":"<p data-start=\"1528\" data-end=\"1877\" class=\"PDq2pG_selectionAnchorContainer\">La s\u00e9curit\u00e9 de la blockchain est g\u00e9n\u00e9ralement abord\u00e9e en termes techniques : ponts compromis, contrats intelligents d\u00e9fectueux, cl\u00e9s vol\u00e9es et failles logicielles. Pourtant, les r\u00e9seaux arriv\u00e9s \u00e0 maturit\u00e9 sont de plus en plus confront\u00e9s \u00e0 une autre forme de risque, car un attaquant n\u2019a pas toujours besoin de pirater le code : il lui suffit parfois d\u2019influencer les m\u00e9canismes \u00e9conomiques sous-jacents au consensus pour obtenir le r\u00e9sultat souhait\u00e9.<span aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"><\/span><\/p>\n<p data-start=\"1879\" data-end=\"2252\">Les r\u00e9seaux de type \u00ab proof-of-stake \u00bb rendent cette relation particuli\u00e8rement \u00e9vidente. Les validateurs engagent des capitaux pour s\u00e9curiser le r\u00e9seau et per\u00e7oivent des r\u00e9compenses lorsqu\u2019ils s\u2019acquittent correctement de leur r\u00f4le, tandis que les sanctions visent \u00e0 rendre les comportements malhonn\u00eates co\u00fbteux. Ce mod\u00e8le fonctionne lorsque le co\u00fbt financier d\u2019une attaque contre le r\u00e9seau d\u00e9passe largement la valeur qu\u2019un attaquant pourrait en tirer.<\/p>\n<p data-start=\"2254\" data-end=\"2606\">Cependant, \u00e0 mesure que la finance blockchain se d\u00e9veloppe, les actifs garantis par un r\u00e9seau peuvent acqu\u00e9rir une valeur bien sup\u00e9rieure \u00e0 celle du token natif qui sous-tend son m\u00e9canisme de consensus. Une cha\u00eene peut servir de support \u00e0 des stablecoins, des fonds tokenis\u00e9s, des pr\u00eats et d\u2019autres cr\u00e9ances financi\u00e8res dont l\u2019importance \u00e9conomique combin\u00e9e d\u00e9passe largement la valeur de march\u00e9 initialement prise en compte pour d\u00e9finir ses hypoth\u00e8ses de s\u00e9curit\u00e9.<\/p>\n<p data-start=\"2608\" data-end=\"2935\">Ce d\u00e9s\u00e9quilibre m\u00e9rite qu'on s'y attarde davantage, car l'infrastructure financi\u00e8re repose en fin de compte autant sur les incitations que sur la cryptographie. Si la manipulation d'un r\u00e9seau co\u00fbte 1 milliard de livres sterling alors qu'une attaque r\u00e9ussie pourrait avoir des r\u00e9percussions sur des actifs d'une valeur plusieurs fois sup\u00e9rieure, la sophistication technique \u00e0 elle seule ne suffit pas \u00e0 garantir la s\u00e9curit\u00e9 \u00e9conomique du syst\u00e8me.<\/p>\n<h2 data-section-id=\"1ww7g0s\" data-start=\"2937\" data-end=\"2985\">Les variations de la concentration des mises modifient le calcul<\/h2>\n<p data-start=\"2987\" data-end=\"3372\">Le \u00ab proof-of-stake \u00bb pr\u00e9sentait notamment l'int\u00e9r\u00eat de supprimer l'\u00e9norme consommation d'\u00e9nergie li\u00e9e au minage en \u00ab proof-of-work \u00bb, m\u00eame si le staking a g\u00e9n\u00e9r\u00e9 ses propres tensions de concentration. Les grandes plateformes d'\u00e9change, les d\u00e9positaires et les services de staking liquide peuvent ainsi accumuler un pouvoir de vote consid\u00e9rable, car les d\u00e9tenteurs individuels pr\u00e9f\u00e8rent souvent d\u00e9l\u00e9guer leurs jetons \u00e0 des validateurs plut\u00f4t que de les exploiter eux-m\u00eames.<\/p>\n<p data-start=\"3374\" data-end=\"3610\">La facilit\u00e9 d'utilisation explique en grande partie cette concentration. Les investisseurs institutionnels souhaitent rarement que leurs employ\u00e9s g\u00e8rent l'infrastructure des validateurs dans le seul but de percevoir des r\u00e9compenses de staking, tandis que les particuliers peuvent participer via un service en quelques clics.<\/p>\n<p data-start=\"3612\" data-end=\"3910\">Un r\u00e9seau peut donc rester d\u00e9centralis\u00e9, avec des milliers de d\u00e9tenteurs de jetons, tandis que la validation pratique se concentre entre les mains d\u2019un nombre bien plus restreint d\u2019op\u00e9rateurs. Les statistiques de d\u00e9tention, \u00e0 elles seules, peuvent masquer l\u2019\u00e9tendue de l\u2019influence que ces op\u00e9rateurs exercent sur la production des blocs et l\u2019ordre des transactions.<\/p>\n<p data-start=\"3912\" data-end=\"4265\">Les jetons de \u00ab liquid staking \u00bb compliquent encore davantage la situation, car une m\u00eame position \u00e9conomique peut appara\u00eetre \u00e0 plusieurs niveaux du syst\u00e8me financier. Un investisseur met un actif en staking, re\u00e7oit une repr\u00e9sentation liquide, puis utilise ce jeton comme garantie ailleurs, ce qui permet \u00e0 un m\u00eame pool de capitaux sous-jacent de soutenir plusieurs activit\u00e9s financi\u00e8res simultan\u00e9ment.<\/p>\n<p data-start=\"4267\" data-end=\"4419\">Cette efficacit\u00e9 peut permettre une meilleure utilisation du capital, m\u00eame si les tensions peuvent se propager plus rapidement dans le syst\u00e8me lorsque les hypoth\u00e8ses relatives \u00e0 la participation sous-jacente \u00e9voluent.<\/p>\n<h2 data-section-id=\"xespaj\" data-start=\"4421\" data-end=\"4467\">Le \u00ab restaking \u00bb renforce la s\u00e9curit\u00e9\u2026 mais aussi la d\u00e9pendance<\/h2>\n<p data-start=\"4469\" data-end=\"4751\">Le \u00ab restaking \u00bb va plus loin en permettant aux actifs mis en jeu de s\u00e9curiser d'autres applications ou services. L'int\u00e9r\u00eat \u00e9conomique est \u00e9vident : le capital d\u00e9j\u00e0 engag\u00e9 dans un r\u00e9seau peut g\u00e9n\u00e9rer des rendements suppl\u00e9mentaires au lieu de rester affect\u00e9 \u00e0 une seule fonction de s\u00e9curit\u00e9.<\/p>\n<p data-start=\"4753\" data-end=\"4981\">Les d\u00e9veloppeurs b\u00e9n\u00e9ficient \u00e9galement d'une r\u00e9serve de s\u00e9curit\u00e9 \u00e9conomique d\u00e9j\u00e0 en place, ce qui leur \u00e9vite de devoir mettre en place un r\u00e9seau de validateurs \u00e0 partir de z\u00e9ro. Pour les nouveaux services bas\u00e9s sur la blockchain, cela peut r\u00e9duire consid\u00e9rablement les obstacles au d\u00e9ploiement de l'infrastructure.<\/p>\n<p data-start=\"4983\" data-end=\"5225\">Ce dilemme appara\u00eet lorsque plusieurs syst\u00e8mes d\u00e9pendent de la m\u00eame garantie. Une d\u00e9faillance ou une p\u00e9nalit\u00e9 provenant d'un service peut affecter les participants dont les actifs soutiennent \u00e9galement un autre service, reliant ainsi des applications qui semblaient auparavant ind\u00e9pendantes.<\/p>\n<p data-start=\"5227\" data-end=\"5513\">Les investisseurs doivent donc bien comprendre ce que leur capital engag\u00e9 leur garantit. Un rendement plus \u00e9lev\u00e9 peut traduire une meilleure efficacit\u00e9 du capital, mais il peut tout aussi bien correspondre \u00e0 une compensation pour des conditions de r\u00e9duction suppl\u00e9mentaires et des d\u00e9pendances difficiles \u00e0 percevoir \u00e0 partir du rendement affich\u00e9.<\/p>\n<h2 data-section-id=\"1oggdwd\" data-start=\"5515\" data-end=\"5559\">Les \u00e9tablissements poseront des questions diff\u00e9rentes<\/h2>\n<p data-start=\"5561\" data-end=\"5831\">L'adoption par les institutions modifie la norme, car les banques et <a href=\"https:\/\/www.fundavia.com\/etfs-index-investing\/fixed-income-etfs\/bond-etfs-are-back-in-portfolios-duration-decides-what-investors-actually-own\/\">actif<\/a> Les responsables ont l'habitude d'analyser la concentration des risques, l'exposition aux contreparties et la r\u00e9silience op\u00e9rationnelle li\u00e9es aux infrastructures financi\u00e8res. \u00c0 terme, ils appliqueront une analyse tout aussi rigoureuse au consensus de la blockchain.<\/p>\n<p data-start=\"5833\" data-end=\"6058\">Une institution financi\u00e8re proc\u00e9dant au r\u00e8glement <a href=\"https:\/\/www.arxelo.com\/fr\/infrastructure-web3\/identite-decentralisee\/les-actions-tokenisees-se-rapprochent-de-plus-en-plus-du-marche-traditionnel\/\">tokenis\u00e9<\/a> Les d\u00e9tenteurs d'actifs pourraient souhaiter savoir combien d'entit\u00e9s d\u00e9tiennent une part suffisante pour compromettre la finalit\u00e9, o\u00f9 op\u00e8rent ces validateurs et dans quel d\u00e9lai le r\u00e9seau pourrait se remettre d'une d\u00e9faillance coordonn\u00e9e.<\/p>\n<p data-start=\"6060\" data-end=\"6334\">Ces questions font \u00e9voluer l'analyse de la blockchain au-del\u00e0 du d\u00e9bat habituel visant \u00e0 d\u00e9terminer si un m\u00e9canisme de consensus est, en th\u00e9orie, plus d\u00e9centralis\u00e9 qu'un autre. La question pratique porte sur le comportement d'un r\u00e9seau donn\u00e9 lorsque d'importantes sommes d'argent r\u00e9el en d\u00e9pendent.<\/p>\n<p data-start=\"6336\" data-end=\"6626\">Les r\u00e9seaux blockchain ont mis des ann\u00e9es \u00e0 d\u00e9montrer que le consensus distribu\u00e9 pouvait fonctionner \u00e0 l'\u00e9chelle mondiale. \u00c0 mesure que la valeur des actifs qui y transitent augmente, le prochain d\u00e9fi consistera \u00e0 d\u00e9terminer si le syst\u00e8me \u00e9conomique qui s\u00e9curise le registre \u00e9volue avec autant de rigueur que le syst\u00e8me financier qui se construit par-dessus.<\/p>\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>\u00c0 mesure que la technologie de la blockchain gagne en maturit\u00e9, les vuln\u00e9rabilit\u00e9s \u00e9conomiques constituent des menaces importantes pour sa s\u00e9curit\u00e9. Cet article examine ces nouveaux d\u00e9fis et apporte un \u00e9clairage sur leurs implications.<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[7],"tags":[],"class_list":["post-837","post","type-post","status-publish","format-standard","hentry","category-blockchain-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Blockchain\u2019s Next Security Problem Is Economic, Rather Than Technical<\/title>\n<meta name=\"description\" content=\"As blockchain technology matures, economic vulnerabilities pose significant threats to its security. 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