{"id":119059,"date":"2026-04-04T08:38:00","date_gmt":"2026-04-04T07:38:00","guid":{"rendered":"https:\/\/investx.fr\/pt\/?p=119059"},"modified":"2026-04-04T10:46:14","modified_gmt":"2026-04-04T09:46:14","slug":"bitcoin-ameacado-google-computacao-quantica","status":"publish","type":"post","link":"https:\/\/investx.fr\/pt\/noticias-cripto\/bitcoin-ameacado-google-computacao-quantica\/","title":{"rendered":"Bitcoin destru\u00eddo em 9 minutos pelo Google: O impacto da computa\u00e7\u00e3o qu\u00e2ntica"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" class=\"wp-block-heading\" id=\"google-reduz-em-20x-os-recursos-para-piratear-a-bitcoin\">Google reduz em 20x os recursos para piratear a Bitcoin<\/h2>\n\n\n\n<p>A <strong>30 de mar\u00e7o de 2026<\/strong>, a Google Quantum AI publicou um whitepaper que abalou os mercados de criptomoedas muito al\u00e9m dos c\u00edrculos de investigadores. Intitulado &#8220;Securing Elliptic Curve <a href=\"https:\/\/investx.fr\/pt\/noticias-cripto\/\">Cryptocurrencies<\/a> against Quantum Vulnerabilities&#8221;, coescrito com equipas de Stanford e da Funda\u00e7\u00e3o <a href=\"https:\/\/investx.fr\/pt\/aprender-criptomoedas\/cripto\/ethereum\/\">Ethereum<\/a>, o documento demonstra que quebrar a criptografia de curva el\u00edptica que protege a <a href=\"https:\/\/investx.fr\/pt\/aprender-criptomoedas\/cripto\/bitcoin\/\">Bitcoin<\/a> e o Ethereum exigiria menos de <strong>500 000 qubits f\u00edsicos<\/strong>, ou seja, uma redu\u00e7\u00e3o de cerca de <strong>20 vezes<\/strong> em compara\u00e7\u00e3o com as estimativas anteriores que apontavam para v\u00e1rios milh\u00f5es.<\/p>\n\n\n\n<p>A m\u00e1quina qu\u00e2ntica descrita poderia quebrar uma chave privada de Bitcoin em cerca de <strong>9 minutos<\/strong> assim que a chave p\u00fablica fosse exposta, dando a um atacante cerca de <strong>41 % de probabilidades<\/strong> de bater a janela de confirma\u00e7\u00e3o de <strong>10 minutos<\/strong> da rede. Isto abre caminho para os chamados ataques &#8220;on-spend&#8221;: visar uma transa\u00e7\u00e3o ativa na mempool antes que esta seja confirmada num bloco.<\/p>\n\n\n\n<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=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">\ud83d\udea8BREAKING: GOOGLE WARNS 6.9M BITCOIN WILL BE VULNERABLE WHEN QUANTUM COMPUTERS BECOME POWERFUL ENOUGH<br><br>A new Google Quantum AI whitepaper has identified approximately 6.9 million Bitcoin <a href=\"https:\/\/twitter.com\/search?q=%24BTC&amp;src=ctag&amp;ref_src=twsrc%5Etfw\">$BTC<\/a> vulnerable to future quantum at-rest attacks. <br><br>Around 1.7 million BTC sits in old\u2026 <a href=\"https:\/\/t.co\/pCwKrhXL4e\">pic.twitter.com\/pCwKrhXL4e<\/a><\/p>&mdash; BSCN (@BSCNews) <a href=\"https:\/\/twitter.com\/BSCNews\/status\/2038837659901251642?ref_src=twsrc%5Etfw\">March 31, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" class=\"wp-block-heading\" id=\"o-que-explica-o-documento\">O que explica o documento<\/h2>\n\n\n\n<p>Antes de avan\u00e7armos, imp\u00f5e-se um ponto de clareza. O p\u00e2nico n\u00e3o se justifica. A equipa publicou uma estimativa rigorosa dos recursos necess\u00e1rios para resolver o problema do logaritmo discreto em curva el\u00edptica (ECDLP), e este resultado \u00e9 inferior \u00e0s estimativas anteriores. Mas &#8220;inferior&#8221; e &#8220;vi\u00e1vel hoje&#8221; n\u00e3o s\u00e3o a mesma coisa. O roadmap da IBM para sistemas tolerantes a falhas aponta para cerca de <strong>200 qubits l\u00f3gicos<\/strong> at\u00e9 2029 com o seu sistema Starling. Ainda muito longe dos <strong>1 200 a 1 450 qubits l\u00f3gicos<\/strong> que o ataque exige. Passar de alguns milhares de qubits para centenas de milhares implica problemas de engenharia ainda n\u00e3o resolvidos.<\/p>\n\n\n\n<p>O que muda realmente com esta publica\u00e7\u00e3o \u00e9 a <strong>compress\u00e3o percebida do calend\u00e1rio<\/strong>. &#8220;J\u00e1 n\u00e3o estamos a olhar para meados da d\u00e9cada de 2030, poderemos ter computadores qu\u00e2nticos a esta escala at\u00e9 ao final da d\u00e9cada&#8221;, afirmou Haseeb Qureshi, s\u00f3cio-gerente na Dragonfly. \u00c9 esta revis\u00e3o do cronograma estimado, e n\u00e3o uma amea\u00e7a imediata, que merece a aten\u00e7\u00e3o dos investidores em criptomoedas.<\/p>\n\n\n\n<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=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Many are wondering &quot;what Google saw&quot; that caused them to revise their post-quantum cryptography transition deadline to 2029 last week. It was this: <a href=\"https:\/\/t.co\/dQtmTK9pdz\">https:\/\/t.co\/dQtmTK9pdz<\/a><\/p>&mdash; nic carter (@nic_carter) <a href=\"https:\/\/twitter.com\/nic_carter\/status\/2038804571791761821?ref_src=twsrc%5Etfw\">March 31, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" class=\"wp-block-heading\" id=\"os-69-milhoes-de-btc-expostos-que-carteiras-estao-em-risco\">Os 6,9 milh\u00f5es de BTC expostos: Que carteiras est\u00e3o em risco?<\/h2>\n\n\n\n<p>Cerca de <strong>6,9 milh\u00f5es de bitcoins<\/strong> s\u00e3o particularmente vulner\u00e1veis, nomeadamente os endere\u00e7os Legacy (P2PK) utilizados nos prim\u00f3rdios da rede. Incluindo as carteiras atribu\u00eddas a Satoshi Nakamoto, bem como os endere\u00e7os cuja chave p\u00fablica foi exposta na <a href=\"https:\/\/investx.fr\/pt\/aprender-criptomoedas\/blockchain\/\">blockchain<\/a> atrav\u00e9s de transa\u00e7\u00f5es passadas.<\/p>\n\n\n\n<p>Os endere\u00e7os Pay-to-Taproot (P2TR) apresentam uma exposi\u00e7\u00e3o espec\u00edfica. Estes exp\u00f5em chaves p\u00fablicas sob a forma de pontos de curva el\u00edptica diretamente on-chain, dando a um atacante qu\u00e2ntico uma janela indefinida para trabalhar offline. A Tabela I do whitepaper quantifica a exposi\u00e7\u00e3o, as sa\u00eddas P2TR estavam associadas a cerca de <strong>16,8 milh\u00f5es de BTC<\/strong> movimentados em 2025, representando <strong>21,68 %<\/strong> de todas as transa\u00e7\u00f5es de <a href=\"https:\/\/investx.fr\/pt\/aprender-criptomoedas\/cripto\/bitcoin\/\">Bitcoin<\/a> nesse ano.<\/p>\n\n\n\n<p>Este detalhe sobre a Taproot \u00e9 particularmente ir\u00f3nico: a atualiza\u00e7\u00e3o de 2021 tinha sido apresentada como uma melhoria de privacidade e efici\u00eancia, e a sua ado\u00e7\u00e3o massiva cria agora uma superf\u00edcie de ataque mais ampla em caso de avan\u00e7o qu\u00e2ntico.<\/p>\n\n\n\n<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=\"500\" data-dnt=\"true\"><p lang=\"zxx\" dir=\"ltr\"><a href=\"https:\/\/t.co\/0nJC7BEXTC\">https:\/\/t.co\/0nJC7BEXTC<\/a><\/p>&mdash; Cointelegraph (@Cointelegraph) <a href=\"https:\/\/twitter.com\/Cointelegraph\/status\/2038935730286985723?ref_src=twsrc%5Etfw\">March 31, 2026<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" class=\"wp-block-heading\" id=\"a-bitcoin-face-a-ameaca-quantica-quem-esta-preparado\">A Bitcoin face \u00e0 amea\u00e7a qu\u00e2ntica: Quem est\u00e1 preparado?<\/h2>\n\n\n\n<p>As duas principais redes seguem trajet\u00f3rias muito diferentes face a esta amea\u00e7a. O Ethereum dedicou anos a preparar atualiza\u00e7\u00f5es resistentes a ataques qu\u00e2nticos. Com marcos j\u00e1 planeados no seu roadmap para o final da d\u00e9cada. A abstra\u00e7\u00e3o de conta e a flexibilidade das assinaturas d\u00e3o-lhe um avan\u00e7o na substitui\u00e7\u00e3o das primitivas criptogr\u00e1ficas. Para a Bitcoin, o caminho \u00e9 mais ponderado. Propostas como a BIP-360 e redes de teste experimentais s\u00e3o os primeiros passos. Mas uma migra\u00e7\u00e3o completa exigiria provavelmente uma grande atualiza\u00e7\u00e3o do consenso.<\/p>\n\n\n\n<p>A nossa leitura sobre este assunto: a rea\u00e7\u00e3o calma do mercado no momento da publica\u00e7\u00e3o \u00e9, por si s\u00f3, instrutiva. Os traders profissionais tratam este sinal como um risco a 3 a 5 anos, e n\u00e3o como uma urg\u00eancia imediata. Esta racionalidade \u00e9 justificada. Por outro lado, duas a\u00e7\u00f5es concretas merecem aten\u00e7\u00e3o desde j\u00e1 para qualquer detentor de Bitcoin. Evitar a reutiliza\u00e7\u00e3o de endere\u00e7os de rece\u00e7\u00e3o e verificar se os fundos n\u00e3o est\u00e3o expostos em endere\u00e7os P2PK Legacy. Isto n\u00e3o \u00e9 paranoia, \u00e9 higiene de seguran\u00e7a b\u00e1sica que a publica\u00e7\u00e3o da Google acaba de tornar mais urgente do que nunca.<\/p>\n\n\n\n<p><strong>Fontes:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/x.com\/BSCNews\">BSCNews<\/a> no X<\/li>\n\n\n\n<li><a href=\"https:\/\/x.com\/Cointelegraph\">Cointelegraph<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/x.com\/nic_carter\">nic_carter<\/a> no X<\/li>\n<\/ul>\n\n\n\n<p><strong>Artigos Relacionados:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/investx.fr\/pt\/noticias-cripto\/analise-preco-xrp-queda-2026\/\">XRP: An\u00e1lise revela potencial queda de 52% para 0,6$ em 2026<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/investx.fr\/pt\/noticias-cripto\/escandalo-circle-zachxbt-transacoes-suspeitas-usdc\/\">Circle: ZachXBT denuncia $420M em USDC suspeito<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/investx.fr\/pt\/noticias-cripto\/ethereum-crash-analise-2400\/\">Ethereum em risco: Novo crash se ETH N\u00e3o defender os 2400$?<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>O computador qu\u00e2ntico do Google pode quebrar o Bitcoin em minutos. Saiba o impacto devastador no mercado de criptomoedas e o que esperar.<\/p>\n","protected":false},"author":47,"featured_media":119058,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"Bitcoin Google","_yoast_wpseo_title":"Bitcoin e a amea\u00e7a qu\u00e2ntica do Google em 9 minutos","_yoast_wpseo_metadesc":"O computador qu\u00e2ntico do Google pode quebrar o Bitcoin em minutos. Saiba o impacto devastador no mercado de criptomoedas e o que esperar.","footnotes":"","faq_titre":"","questions_frequentes":"","custom_permalink":"noticias-cripto\/bitcoin-ameacado-google-computacao-quantica"},"categories":[42,6],"tags":[],"class_list":["post-119059","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bitcoin","category-noticias-cripto"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Bitcoin e a amea\u00e7a qu\u00e2ntica do Google em 9 minutos<\/title>\n<meta name=\"description\" content=\"O computador qu\u00e2ntico do Google pode quebrar o Bitcoin em minutos. 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