{"id":3266,"date":"2026-05-02T18:58:38","date_gmt":"2026-05-02T18:58:38","guid":{"rendered":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/05\/02\/un-chercheur-de-paradigm-propose-un-plan-de-sauvegarde-resistant-a-linformatique-quantique-pour-bitcoin\/"},"modified":"2026-05-02T18:58:38","modified_gmt":"2026-05-02T18:58:38","slug":"un-chercheur-de-paradigm-propose-un-plan-de-sauvegarde-resistant-a-linformatique-quantique-pour-bitcoin","status":"publish","type":"post","link":"https:\/\/global.livebitcoinnews.com\/fr\/2026\/05\/02\/un-chercheur-de-paradigm-propose-un-plan-de-sauvegarde-resistant-a-linformatique-quantique-pour-bitcoin\/","title":{"rendered":"Un chercheur de Paradigm propose un plan de sauvegarde r\u00e9sistant \u00e0 l&rsquo;informatique quantique pour Bitcoin."},"content":{"rendered":"<ul>\n<li style=\"font-weight: 400\"><em><span style=\"font-weight: 400\">Le chercheur de Paradigm Dan Robinson a propos\u00e9 les PACTs, permettant aux d\u00e9tenteurs de Bitcoin d\u2019horodater silencieusement la propri\u00e9t\u00e9 des cl\u00e9s sans frais on-chain.<\/span><span style=\"font-weight: 400\"><br \/>\n<\/span><\/em><\/li>\n<li style=\"font-weight: 400\"><em><span style=\"font-weight: 400\">Les 1,1 million de BTC de Satoshi Nakamoto, d\u2019une valeur de plus de 75 milliards de dollars, se trouvent dans des portefeuilles que les plans de sauvetage quantique existants ne peuvent pas couvrir.<\/span><span style=\"font-weight: 400\"><br \/>\n<\/span><\/em><\/li>\n<li style=\"font-weight: 400\"><em><span style=\"font-weight: 400\">Une preuve STARK li\u00e9e \u00e0 un horodatage ant\u00e9rieur \u00e0 la date limite permettrait aux d\u00e9tenteurs de r\u00e9cup\u00e9rer des fonds mis au rebut sans r\u00e9v\u00e9ler les d\u00e9tails de la cl\u00e9 priv\u00e9e.<\/span><\/em><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400\">Un chercheur de Paradigm a propos\u00e9 un plan de sauvegarde r\u00e9sistant aux quantiques pour Bitcoin qui permet aux d\u00e9tenteurs de prot\u00e9ger leurs fonds silencieusement et sans aucune action on-chain.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Dan Robinson<\/span><a href=\"https:\/\/www.paradigm.xyz\/2026\/05\/pacts-protecting-your-bitcoin-from-a-quantum-sunset\"><span style=\"font-weight: 400\"> a publi\u00e9<\/span><\/a><span style=\"font-weight: 400\"> le concept le 1er mai 2026, introduisant les Provable Address-Control Timestamps, ou PACTs.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Le protocole cible les adresses dont les cl\u00e9s publiques sont expos\u00e9es, lesquelles restent vuln\u00e9rables au vol par des ordinateurs quantiques cryptographiquement pertinents. Robinson soutient que les d\u00e9tenteurs peuvent agir d\u00e8s aujourd\u2019hui, avant qu\u2019une mise \u00e0 niveau du protocole ne soit n\u00e9cessaire.<\/span><\/p>\n<h2><b>Le plaidoyer de Robinson pour une mesure d\u2019autoprotection silencieuse<\/b><\/h2>\n<p><span style=\"font-weight: 400\">Robinson a b\u00e2ti sa proposition autour d\u2019une pr\u00e9occupation simple : les d\u00e9tenteurs de Bitcoin dont les cl\u00e9s publiques sont expos\u00e9es n\u2019ont aucun moyen discret de se prot\u00e9ger aujourd\u2019hui.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Un ordinateur quantique assez puissant pour d\u00e9river des cl\u00e9s priv\u00e9es pourrait voler des centaines de milliards de dollars de Bitcoin.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Les adresses li\u00e9es \u00e0 <\/span><a href=\"https:\/\/www.livebitcoinnews.com\/is-jack-dorsey-really-satoshi-nakamoto-why-its-possible\/\"><span style=\"font-weight: 400\">Satoshi Nakamoto<\/span><\/a><span style=\"font-weight: 400\"> d\u00e9tiennent \u00e0 elles seules environ 1,1 million de BTC, d\u2019une valeur de plus de 75 milliards de dollars aux prix actuels. Ces portefeuilles sont ant\u00e9rieurs \u00e0 BIP\u201132, ce qui les exclut des propositions de sauvetage existantes.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Le protocole PACT r\u00e9pond \u00e0 cela en permettant aux d\u00e9tenteurs d\u2019horodater une preuve cryptographique de possession de la cl\u00e9 via OpenTimestamps.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Le service est gratuit, open\u2011source et regroupe de nombreux engagements en une seule transaction Bitcoin.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Aucune transaction n\u2019est requise de la part du d\u00e9tenteur, et rien concernant son adresse ou son identit\u00e9 n\u2019est r\u00e9v\u00e9l\u00e9. L\u2019engagement n\u2019expose qu\u2019un hachage opaque, rendant le processus enti\u00e8rement silencieux.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Pour cr\u00e9er un PACT, un d\u00e9tenteur g\u00e9n\u00e8re un sel secret de 256 bits et produit une preuve de contr\u00f4le compl\u00e8te de leur adresse vuln\u00e9rable selon BIP\u2011322.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Cette preuve et le sel sont ensuite hach\u00e9s en un engagement, qui est horodat\u00e9 sur la blockchain Bitcoin via OpenTimestamps.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Le d\u00e9tenteur stocke le sel, la preuve et le fichier d\u2019horodatage de mani\u00e8re s\u00e9curis\u00e9e comme artefact de r\u00e9cup\u00e9ration. \u00c0 aucun moment ces informations ne sont partag\u00e9es publiquement ou diffus\u00e9es sur le r\u00e9seau.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Robinson a \u00e9galement not\u00e9 que convenir d\u2019un format standardis\u00e9 pour les PACTs est l\u2019\u00e9tape la plus urgente. Une fois un standard \u00e9tabli, les d\u00e9tenteurs peuvent commencer \u00e0 horodater imm\u00e9diatement sans attendre un fork de Bitcoin.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Cela donne plus de temps \u00e0 la communaut\u00e9 avant qu\u2019une urgence quantique n\u2019impose des d\u00e9cisions pr\u00e9cipit\u00e9es. La proposition n\u2019exige pas que Bitcoin s\u2019engage aujourd\u2019hui sur une ligne de conduite sp\u00e9cifique.<\/span><\/p>\n<h2><b>Comment la voie de sauvetage fonctionnerait sous un futur fork<\/b><\/h2>\n<p><span style=\"font-weight: 400\">Si Bitcoin adopte un jour un coucher de soleil (sunset) sur les adresses vuln\u00e9rables aux quantiques, la proposition de Robinson esquisse un m\u00e9canisme de sauvetage correspondant.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Un d\u00e9tenteur soumettrait une preuve STARK post\u2011quantique montrant qu\u2019il connaissait sa cl\u00e9 priv\u00e9e avant que les ordinateurs quantiques cryptographiquement pertinents aient pu la d\u00e9river.<\/span><\/p>\n<p><span style=\"font-weight: 400\">La preuve serait li\u00e9e \u00e0 une transaction de sauvetage sp\u00e9cifique, emp\u00eachant toute copie ou redirection. Le sel et la preuve BIP\u2011322 resteraient cach\u00e9s tout au long du processus.<\/span><\/p>\n<p><span style=\"font-weight: 400\">La voie de sauvetage exige que l\u2019engagement PACT soit ant\u00e9rieur \u00e0 une date limite d\u00e9finie. Cette date serait fix\u00e9e avant que les CRQC (ordinateurs quantiques cryptographiquement pertinents) ne soient jug\u00e9s capables de briser la cryptographie existante.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Un attaquant qui obtiendrait ult\u00e9rieurement une cl\u00e9 priv\u00e9e par des moyens quantiques ne pourrait pas fabriquer un horodatage ant\u00e9rieur \u00e0 cette date. Cette structure s\u00e9pare la propri\u00e9t\u00e9 l\u00e9gitime de l\u2019acc\u00e8s d\u00e9riv\u00e9 quantiquement de mani\u00e8re v\u00e9rifiable.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Robinson a reconnu qu\u2019il n\u2019existe aucune garantie que Bitcoin adoptera jamais ce protocole de sauvetage.<\/span><\/p>\n<p><span style=\"font-weight: 400\"><a href=\"https:\/\/www.livebitcoinnews.com\/solana-ventures-leads-18m-strategic-round-to-expand-multisig-tools\/\">Les portefeuilles multisig<\/a>,<\/span><span style=\"font-weight: 400\"> les scripts complexes et la prise en charge des portefeuilles mat\u00e9riels n\u00e9cessiteraient chacun une normalisation suppl\u00e9mentaire avant que les PACTs puissent s\u2019appliquer universellement. Les d\u00e9tenteurs devraient donc consid\u00e9rer les PACTs comme une mesure de pr\u00e9caution plut\u00f4t qu\u2019une protection garantie.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Le faible co\u00fbt de l\u2019engagement, cependant, fait de l\u2019action pr\u00e9coce un choix raisonnable pour les d\u00e9tenteurs \u00e0 long terme.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Le d\u00e9bat plus large sur la pr\u00e9paration quantique de Bitcoin reste ouvert. La proposition de Robinson ne r\u00e9sout pas la question de savoir si un coucher de soleil est n\u00e9cessaire ou souhaitable.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Elle donne plut\u00f4t \u00e0 la communaut\u00e9 un outil suppl\u00e9mentaire avec lequel travailler si cette d\u00e9cision finit par arriver. Pour les d\u00e9tenteurs dormants confront\u00e9s \u00e0 des risques de confidentialit\u00e9 dans les deux cas, cette option suppl\u00e9mentaire peut compter consid\u00e9rablement.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le chercheur de Paradigm Dan Robinson a propos\u00e9 les PACTs, permettant aux d\u00e9tenteurs de Bitcoin d\u2019horodater silencieusement la propri\u00e9t\u00e9 des cl\u00e9s sans frais on-chain. Les 1,1 million de BTC de Satoshi Nakamoto, d\u2019une valeur de plus de 75 milliards de dollars, se trouvent dans des portefeuilles que les plans de sauvetage quantique existants ne peuvent [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":3265,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[7],"tags":[715,52,716,536,717,718,719,720],"class_list":["post-3266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bitcoin-news","tag-bip-322","tag-bitcoin","tag-bitcoin-security","tag-cryptography","tag-dan-robinson","tag-pacts","tag-paradigm","tag-quantum-computing"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Un chercheur de Paradigm propose un plan de sauvegarde r\u00e9sistant \u00e0 l&#039;informatique quantique pour 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\/05\/02\/un-chercheur-de-paradigm-propose-un-plan-de-sauvegarde-resistant-a-linformatique-quantique-pour-bitcoin\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un chercheur de Paradigm propose un plan de sauvegarde r\u00e9sistant \u00e0 l&#039;informatique quantique pour Bitcoin. - France Live Bitcoin News\" \/>\n<meta property=\"og:description\" content=\"Le chercheur de Paradigm Dan Robinson a propos\u00e9 les PACTs, permettant aux d\u00e9tenteurs de Bitcoin d\u2019horodater silencieusement la propri\u00e9t\u00e9 des cl\u00e9s sans frais on-chain. 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