{"id":22730,"date":"2026-06-23T11:39:46","date_gmt":"2026-06-23T11:39:46","guid":{"rendered":"https:\/\/www.coinspeaker.com\/fr\/?p=22730"},"modified":"2026-06-22T14:47:43","modified_gmt":"2026-06-22T14:47:43","slug":"bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes","status":"publish","type":"post","link":"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/","title":{"rendered":"Bitcoin : l&rsquo;ANSSI impose le post-quantique face \u00e0 6 millions de BTC expos\u00e9s"},"content":{"rendered":"\r\n<p class=\"wp-block-paragraph\">Dans l&rsquo;actualit\u00e9 Bitcoin du jour, l&rsquo;agence fran\u00e7aise de cybers\u00e9curit\u00e9, l&rsquo;ANSSI (Agence Nationale de la S\u00e9curit\u00e9 des Syst\u00e8mes d&rsquo;Information), a <a href=\"https:\/\/www.reuters.com\/legal\/litigation\/france-stop-certifying-products-without-quantum-safe-encryption-2026-06-16\/\" target=\"_blank\" rel=\"\">annonc\u00e9<\/a> lors de la conf\u00e9rence annuelle France Quantum qu&rsquo;elle cesserait de certifier les produits de s\u00e9curit\u00e9 d\u00e9pourvus de chiffrement r\u00e9sistant au quantique \u00e0 partir de 2027. Une transition compl\u00e8te pour les entreprises est fix\u00e9e \u00e0 2030, une obligation qui s&rsquo;applique aux agences gouvernementales fran\u00e7aises et aux op\u00e9rateurs d&rsquo;infrastructures critiques. Cette d\u00e9cision intervient alors que le <a href=\"https:\/\/decrypt.co\/371487\/france-phase-out-non-quantum-encryption-bitcoin-security-concerns-grow\" target=\"_blank\" rel=\"\">rapport de mai 2026 de Glassnode<\/a> identifie 6,04 millions de BTC, soit environ 30,2 % de l&rsquo;offre \u00e9mise, comme ayant des cl\u00e9s publiques visibles sur la blockchain.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Il ne s&rsquo;agit pas d&rsquo;une simple r\u00e8gle de passation de march\u00e9s europ\u00e9ens. C&rsquo;est l&rsquo;\u00e9ch\u00e9ance gouvernementale la plus concr\u00e8te \u00e0 ce jour pour l&rsquo;abandon de la cryptographie classique \u00e0 cl\u00e9 publique. Elle arrive \u00e0 un moment o\u00f9 la communaut\u00e9 de s\u00e9curit\u00e9 Bitcoin quantifie activement la part de l&rsquo;offre du r\u00e9seau structurellement expos\u00e9e \u00e0 un ordinateur quantique fonctionnel.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><blockquote class=\"twitter-tweet\" data-width=\"474\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">ANSSI has sent a clear signal: from 2027, products seeking certification will need to address the quantum threat with post-quantum cryptographic protections.<br><br>As the risk of &quot;Harvest Now, Decrypt Later&quot; attacks grows, preparing for the post-quantum transition is becoming a\u2026<\/p>&mdash; SEALSQ (@SEALSQcorp) <a rel=\"noopener noreferrer\" target=\"_blank\" rel=\"noopener nofollow sponsored\" href=\"https:\/\/x.com\/SEALSQcorp\/status\/2067523751588069845?ref_src=twsrc%5Etfw\">June 18, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\r\n<p>&nbsp;<\/p>\r\n<h2>S\u00e9curit\u00e9 Bitcoin : Analyse de Glassnode sur l&rsquo;exposition des 6,04 millions de BTC<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Glassnode divise l&rsquo;offre expos\u00e9e en deux cat\u00e9gories distinctes. La premi\u00e8re comprend 1,92 million de BTC (~9,6 % de l&rsquo;offre), qualifi\u00e9s de structurellement expos\u00e9s. Il s&rsquo;agit de sorties (outputs) qui r\u00e9v\u00e8lent la cl\u00e9 publique par conception, notamment les r\u00e9compenses de minage de l&rsquo;\u00e8re Satoshi (P2PK), les scripts multisig bruts et les sorties Taproot (P2TR). La seconde cat\u00e9gorie regroupe 4,12 millions de BTC (~20,6 %) class\u00e9s comme op\u00e9rationnellement expos\u00e9s, o\u00f9 les cl\u00e9s publiques sont devenues visibles suite \u00e0 la r\u00e9utilisation d&rsquo;adresses, \u00e0 des d\u00e9penses partielles d&rsquo;UTXO ou \u00e0 des pratiques de garde (custody).<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">L&rsquo;accent analytique du rapport est notable : Glassnode souligne que le risque principal r\u00e9side dans les pratiques de stockage actuelles plut\u00f4t que dans les pi\u00e8ces anciennes. Les plateformes d&rsquo;\u00e9change repr\u00e9sentent environ 1,63 \u00e0 1,66 million de BTC de l&rsquo;ensemble op\u00e9rationnellement expos\u00e9. En revanche, les avoirs souverains en BTC des \u00c9tats-Unis, du Royaume-Uni et du Salvador ne pr\u00e9senteraient aucune exposition quantique, ce qui sugg\u00e8re l&rsquo;utilisation de types d&rsquo;UTXO non expos\u00e9s. Les 13,99 millions de BTC (~69,8 %) sans exposition de cl\u00e9 publique au repos sont consid\u00e9r\u00e9s comme s\u00fbrs selon le cadre de Glassnode.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><blockquote class=\"twitter-tweet\" data-width=\"474\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Glassnode revealed that around 6.04M BTC nearly 30% of Bitcoin supply is theoretically at risk from future quantum threats because public keys are already visible on chain.<br><br>Whats even more interesting is that 4.12M BTC of that risk stems from preventable practices like address\u2026 <a rel=\"noopener noreferrer\" target=\"_blank\" rel=\"noopener nofollow sponsored\" href=\"https:\/\/t.co\/qznsfApz8P\">pic.twitter.com\/qznsfApz8P<\/a><\/p>&mdash; evans (@evans1vn) <a rel=\"noopener noreferrer\" target=\"_blank\" rel=\"noopener nofollow sponsored\" href=\"https:\/\/x.com\/evans1vn\/status\/2059502687843135518?ref_src=twsrc%5Etfw\">May 27, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\r\n\r\n\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Le m\u00e9canisme de menace est clairement d\u00e9fini. La signature des transactions Bitcoin repose sur l&rsquo;ECDSA (Elliptic Curve Digital Signature Algorithm) sur la courbe secp256k1, dont la s\u00e9curit\u00e9 est bas\u00e9e sur le probl\u00e8me du logarithme discret sur les courbes elliptiques. Un ordinateur quantique tol\u00e9rant aux fautes ex\u00e9cutant l&rsquo;algorithme de Shor pourrait r\u00e9cup\u00e9rer une cl\u00e9 priv\u00e9e \u00e0 partir de n&rsquo;importe quelle cl\u00e9 publique d\u00e9j\u00e0 visible sur la cha\u00eene, signifiant que les 6,04 millions de BTC aux cl\u00e9s expos\u00e9es seraient directement menac\u00e9s d\u00e8s l&rsquo;arriv\u00e9e du \u00ab\u00a0Q-Day\u00a0\u00bb. Les sorties de type \u00ab\u00a0hash-of-pubkey\u00a0\u00bb, telles que le P2PKH, b\u00e9n\u00e9ficient d&rsquo;une couche de protection suppl\u00e9mentaire jusqu&rsquo;\u00e0 ce qu&rsquo;elles soient d\u00e9pens\u00e9es.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><strong>\u00c0 D\u00c9COUVRIR : <a href=\"https:\/\/www.coinspeaker.com\/ethereum-hard-fork-quantum-security-advantage-news\/\" target=\"_blank\" rel=\"nofollow\">Explication des plans de Hard Fork d&rsquo;Ethereum pour la s\u00e9curit\u00e9 quantique<\/a><\/strong><\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">Cryptographie Post-Quantique : Le mandat de l&rsquo;ANSSI et l&rsquo;acc\u00e9l\u00e9ration du calendrier<\/h2>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Le chef de cabinet de l&rsquo;ANSSI, Samih Souissi, s&rsquo;exprimant lors de la conf\u00e9rence France Quantum, a formul\u00e9 ce changement de politique dans des termes qui d\u00e9passent largement les normes techniques. \u00ab Ce n&rsquo;est pas seulement une question technique. C&rsquo;est une question de gouvernance, de planification industrielle, de r\u00e9glementation et de souverainet\u00e9 \u00bb, a d\u00e9clar\u00e9 Souissi.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">La feuille de route de l&rsquo;agence demande aux organisations de recenser leurs donn\u00e9es sensibles d&rsquo;ici fin 2026, de cartographier les syst\u00e8mes concern\u00e9s d&rsquo;ici fin 2027 et d&rsquo;achever la migration vers la cryptographie post-quantique (PQC) d&rsquo;ici 2030.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Ce calendrier s&rsquo;aligne sur les signaux d&rsquo;autres grandes institutions, voire les acc\u00e9l\u00e8re dans certains cas. En mars 2026, Google a fix\u00e9 une \u00e9ch\u00e9ance interne \u00e0 2029 pour la transition de ses syst\u00e8mes vers la PQC. La soci\u00e9t\u00e9 de s\u00e9curit\u00e9 quantique Project Eleven a estim\u00e9 en mai 2026 qu&rsquo;un ordinateur quantique capable de briser la cryptographie pourrait voir le jour d\u00e8s 2030.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\"><blockquote class=\"twitter-tweet\" data-width=\"474\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">\ud83c\udf0d UPDATE: France Blocks Legacy Encryption By 2027<br><br>France\u2019s cybersecurity agency ANSSI is forcing an aggressive cryptographic overhaul, halting certification for legacy encryption by 2027 and mandating exclusively quantum-safe products by 2030.<br><br>ANSSI will stop certifying\u2026 <a rel=\"noopener noreferrer\" target=\"_blank\" rel=\"noopener nofollow sponsored\" href=\"https:\/\/t.co\/tTFX57AB8J\">pic.twitter.com\/tTFX57AB8J<\/a><\/p>&mdash; Zubiqo (@zubiqo) <a rel=\"noopener noreferrer\" target=\"_blank\" rel=\"noopener nofollow sponsored\" href=\"https:\/\/x.com\/zubiqo\/status\/2067471225514057956?ref_src=twsrc%5Etfw\">June 18, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.x.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\r\n<p>&nbsp;<\/p>\r\n<p>Le NIST a indiqu\u00e9 son intention de d\u00e9pr\u00e9cier les sch\u00e9mas classiques \u00e0 cl\u00e9 publique, y compris RSA et ECC, vers 2030 et de mettre fin \u00e0 leur utilisation vers 2035, des \u00e9ch\u00e9ances que les grands \u00e9diteurs de logiciels int\u00e8grent d\u00e9sormais dans les feuilles de route des modules de s\u00e9curit\u00e9 mat\u00e9riels (HSM) et des syst\u00e8mes d&rsquo;exploitation.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Des recherches acad\u00e9miques cit\u00e9es lors de DEF CON 33 sugg\u00e8rent que seulement 1 754 qubits logiques pourraient, selon des hypoth\u00e8ses de mise \u00e0 l&rsquo;\u00e9chelle optimistes, suffire \u00e0 attaquer les blockchains bas\u00e9es sur secp256k1, bien que la plupart des experts situent la fen\u00eatre de menace r\u00e9elle entre dix et vingt ans.<\/p>\r\n\r\n\r\n\r\n<p class=\"wp-block-paragraph\">Des travaux quantitatifs ant\u00e9rieurs situaient le chiffre des BTC expos\u00e9s dans une fourchette large. Une \u00e9tude de Deloitte estimait \u00e0 environ 4 millions le nombre de BTC d\u00e9tenus dans des adresses P2PK ou P2PKH r\u00e9utilis\u00e9es, tandis qu&rsquo;un document de Chaincode Labs de 2025 estimait entre 4 et 10 millions de BTC r\u00e9partis sur des cat\u00e9gories de vuln\u00e9rabilit\u00e9 plus larges. Le chiffre de 6,04 millions avanc\u00e9 par Glassnode s&rsquo;inscrit dans cette fourchette et applique des crit\u00e8res plus \u00e9troits et plus pr\u00e9cis\u00e9ment d\u00e9finis.<\/p>\r\n\r\n\r\n<a class=\"infinscroll_next_page_link\" style=\"display:none\" href=\"https:\/\/www.coinspeaker.com\/fr\/bitcoin-hyper-franchit-le-cap-des-328-millions\/\" rel=\"prev\">next<\/a>","protected":false},"excerpt":{"rendered":"<p>L&rsquo;ANSSI fixe une \u00e9ch\u00e9ance pour le chiffrement post-quantique d&rsquo;ici 2030, alors que 6,04 millions de Bitcoin sont jug\u00e9s vuln\u00e9rables selon Glassnode.<\/p>\n","protected":false},"author":200,"featured_media":22729,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-22730","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actu"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>L&#039;ANSSI impose le post-quantique face \u00e0 6 M de BTC expos\u00e9s<\/title>\n<meta name=\"description\" content=\"L&#039;ANSSI fixe une \u00e9ch\u00e9ance pour le chiffrement post-quantique 2030, alors que 6,04 millions de Bitcoin sont jug\u00e9s vuln\u00e9rables selon Glassnode\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L&#039;ANSSI impose le post-quantique face \u00e0 6 M de BTC expos\u00e9s\" \/>\n<meta property=\"og:description\" content=\"L&#039;ANSSI fixe une \u00e9ch\u00e9ance pour le chiffrement 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post-quantique 2030, alors que 6,04 millions de Bitcoin sont jug\u00e9s vuln\u00e9rables selon Glassnode","og_url":"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/","og_site_name":"Coinspeaker France","article_published_time":"2026-06-23T11:39:46+00:00","og_image":[{"width":1200,"height":675,"url":"https:\/\/www.coinspeaker.com\/fr\/wp-content\/uploads\/sites\/6\/2026\/06\/anssi-quantum-resistant-encryption-bitcoin-security-glassnod-featured.jpg","type":"image\/jpeg"}],"author":"Emmanuel Roux","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Emmanuel Roux","Dur\u00e9e de lecture estim\u00e9e":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/#article","isPartOf":{"@id":"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/"},"author":{"name":"Emmanuel Roux","@id":"https:\/\/www.coinspeaker.com\/fr\/#\/schema\/person\/cd746f0f0b55932ac38810aadfc14ee7"},"headline":"Bitcoin : l&rsquo;ANSSI impose le post-quantique face \u00e0 6 millions de BTC 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Glassnode","breadcrumb":{"@id":"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/#primaryimage","url":"https:\/\/www.coinspeaker.com\/fr\/wp-content\/uploads\/sites\/6\/2026\/06\/anssi-quantum-resistant-encryption-bitcoin-security-glassnod-featured.jpg","contentUrl":"https:\/\/www.coinspeaker.com\/fr\/wp-content\/uploads\/sites\/6\/2026\/06\/anssi-quantum-resistant-encryption-bitcoin-security-glassnod-featured.jpg","width":1200,"height":675},{"@type":"BreadcrumbList","@id":"https:\/\/www.coinspeaker.com\/fr\/bitcoin-lanssi-impose-le-post-quantique-face-a-6-millions-de-btc-exposes\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.coinspeaker.com\/fr\/"},{"@type":"ListItem","position":2,"name":"Bitcoin : l&rsquo;ANSSI impose le post-quantique face \u00e0 6 millions de BTC expos\u00e9s"}]},{"@type":"WebSite","@id":"https:\/\/www.coinspeaker.com\/fr\/#website","url":"https:\/\/www.coinspeaker.com\/fr\/","name":"Coinspeaker France","description":"Bitcoin, Ethereum, Altcoins et actualit\u00e9s crypto avec analyses, cours en direct, graphiques de donn\u00e9es et guides","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.coinspeaker.com\/fr\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/www.coinspeaker.com\/fr\/#\/schema\/person\/cd746f0f0b55932ac38810aadfc14ee7","name":"Emmanuel Roux","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.coinspeaker.com\/fr\/wp-content\/uploads\/sites\/6\/2025\/06\/cropped-pp-1-96x96.png","url":"https:\/\/www.coinspeaker.com\/fr\/wp-content\/uploads\/sites\/6\/2025\/06\/cropped-pp-1-96x96.png","contentUrl":"https:\/\/www.coinspeaker.com\/fr\/wp-content\/uploads\/sites\/6\/2025\/06\/cropped-pp-1-96x96.png","caption":"Emmanuel Roux"},"description":"Issu de la finance traditionnelle, j\u2019ai naturellement bascul\u00e9 vers l\u2019univers crypto, attir\u00e9 par son potentiel. Je souhaite y apporter mon approche analytique et rationnelle, tout en conservant ma curiosit\u00e9. En dehors de l\u2019\u00e9cran, je lis beaucoup (\u00e9conomie, essais, un peu de science-fiction) et je prends plaisir \u00e0 bricoler. Le DIY, pour moi, c\u2019est comme la crypto : comprendre, tester, construire soi-m\u00eame.","url":"https:\/\/www.coinspeaker.com\/fr\/author\/emmanuel\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/posts\/22730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/users\/200"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/comments?post=22730"}],"version-history":[{"count":1,"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/posts\/22730\/revisions"}],"predecessor-version":[{"id":22740,"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/posts\/22730\/revisions\/22740"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/media\/22729"}],"wp:attachment":[{"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/media?parent=22730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/categories?post=22730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.coinspeaker.com\/fr\/wp-json\/wp\/v2\/tags?post=22730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}