{"id":113906,"date":"2025-11-24T13:40:19","date_gmt":"2025-11-24T13:40:19","guid":{"rendered":"https:\/\/investx.fr\/pt\/?p=113906"},"modified":"2025-11-24T13:40:20","modified_gmt":"2025-11-24T13:40:20","slug":"os-computadores-quanticos-representam-uma-ameaca-real-para-o-bitcoin","status":"publish","type":"post","link":"https:\/\/preprod.investx.fr\/pt\/noticias-cripto\/os-computadores-quanticos-representam-uma-ameaca-real-para-o-bitcoin\/","title":{"rendered":"Os computadores qu\u00e2nticos representam uma amea\u00e7a real para o Bitcoin ?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" class=\"wp-block-heading\" id=\"a-criptografia-do-bitcoin-face-aos-computadores-quanticos\">A criptografia do Bitcoin face aos computadores qu\u00e2nticos<\/h2>\n\n\n\n<p>O <strong><a href=\"https:\/\/preprod.investx.fr\/pt\/aprender-criptomoedas\/cripto\/bitcoin\/\">Bitcoin<\/a><\/strong> baseia-se no algoritmo de criptografia assim\u00e9trica ECC (Elliptic Curve Cryptography) para garantir a seguran\u00e7a das transa\u00e7\u00f5es e proteger as chaves privadas dos utilizadores. Esta tecnologia, considerada inviol\u00e1vel pelos computadores cl\u00e1ssicos, poder\u00e1 ser <strong>comprometida por um computador qu\u00e2ntico<\/strong> suficientemente poderoso. O algoritmo de Shor, especificamente concebido para a computa\u00e7\u00e3o qu\u00e2ntica, permitiria teoricamente resolver o problema do logaritmo discreto em curva el\u00edptica num tempo consideravelmente reduzido.<\/p>\n\n\n\n<p>Concretamente, um computador qu\u00e2ntico dotado de v\u00e1rios <strong>milh\u00f5es de qubits est\u00e1veis<\/strong> poderia derivar uma chave privada a partir de uma chave p\u00fablica exposta. Esta vulnerabilidade diz particularmente respeito aos <strong>endere\u00e7os <a href=\"https:\/\/preprod.investx.fr\/pt\/investir-criptomoedas\/comprar\/bitcoin\/\">Bitcoin<\/a> reutilizados<\/strong> ou \u00e0queles que efetuaram pelo menos uma transa\u00e7\u00e3o de sa\u00edda. Os endere\u00e7os que nunca enviaram fundos permanecem relativamente protegidos porque a sua chave p\u00fablica n\u00e3o est\u00e1 revelada na <a href=\"https:\/\/preprod.investx.fr\/pt\/aprender-criptomoedas\/blockchain\/\">blockchain<\/a>.<\/p>\n\n\n\n<p>A comunidade cripto acompanha atentamente os an\u00fancios dos gigantes tecnol\u00f3gicos como a Google e a IBM. O processador Willow da Google, apresentado recentemente, representa um avan\u00e7o significativo em termos de corre\u00e7\u00e3o de erros qu\u00e2nticos. Contudo, ainda estamos <strong>longe das capacidades necess\u00e1rias para amea\u00e7ar concretamente o Bitcoin.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" class=\"wp-block-heading\" id=\"as-solucoes-pos-quanticas-em-desenvolvimento\">As solu\u00e7\u00f5es p\u00f3s-qu\u00e2nticas em desenvolvimento<\/h2>\n\n\n\n<p>Perante esta amea\u00e7a, os programadores de blockchain j\u00e1 trabalham em <strong>protocolos de assinatura resistentes aos computadores qu\u00e2nticos<\/strong>. Nomeadamente o SPHINCS+, normalizado pelo NIST, assim como solu\u00e7\u00f5es baseadas em redes euclidianas como CRYSTALS-Dilithium ou c\u00f3digos corretores de erros. Estas tecnologias oferecem uma resist\u00eancia te\u00f3rica aos ataques qu\u00e2nticos, mantendo-se compat\u00edveis com uma <strong>blockchain p\u00fablica<\/strong>.<\/p>\n\n\n\n<p>O principal obst\u00e1culo reside na implementa\u00e7\u00e3o. Migrar o Bitcoin para uma criptografia p\u00f3s-qu\u00e2ntica exigiria um hard fork consensual, um processo longo e complexo. As proje\u00e7\u00f5es mais otimistas apontam para <strong>5 a 10 anos<\/strong> entre a decis\u00e3o comunit\u00e1ria e a implementa\u00e7\u00e3o global. Durante este per\u00edodo, os especialistas divergem : Alguns estimam que um <strong>computador qu\u00e2ntico capaz de quebrar o ECC-256<\/strong> poder\u00e1 surgir dentro de <strong>10 a 15 anos<\/strong>, enquanto outros consideram este cen\u00e1rio muito mais distante.<\/p>\n\n\n\n<p>O fator limitante continua a ser a estabilidade dos qubits e a <strong>corre\u00e7\u00e3o de erros<\/strong>, uma vez que as m\u00e1quinas atuais sofrem de uma decoer\u00eancia demasiado elevada para representarem uma amea\u00e7a real. Apesar disso, a comunidade Bitcoin j\u00e1 avan\u00e7a em BIPs que integram assinaturas h\u00edbridas combinando ECC e criptografia p\u00f3s-qu\u00e2ntica, <strong>uma estrat\u00e9gia proativa para evitar uma crise se uma revolu\u00e7\u00e3o qu\u00e2ntica ocorrer mais cedo do que o previsto.<\/strong><\/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=\"fr\" dir=\"ltr\">Et si, demain matin, en te r\u00e9veillant, ton Bitcoin ne valait plus rien ?<br><br>Pas \u00e0 cause d\u2019un bug ou de la r\u00e9gulation.<br><br>Mais \u00e0 cause d&#39;une technologie qui pourrait briser son code et sa s\u00e9curit\u00e9 :<br><br>L&#39;informatique quantique.<br><br>D\u00e9couvrez en quoi la confrontation entre le Bitcoin contre\u2026 <a href=\"https:\/\/t.co\/KrjILGxWKG\">pic.twitter.com\/KrjILGxWKG<\/a><\/p>&mdash; Goku \ud83d\uddde (@Crypto__Goku) <a href=\"https:\/\/twitter.com\/Crypto__Goku\/status\/1969660388397482227?ref_src=twsrc%5Etfw\">September 21, 2025<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<p><strong>Sobre o mesmo assunto :<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/preprod.investx.fr\/pt\/noticias-cripto\/quem-sao-os-detentores-dos-wallets-com-bilhoes-de-xrp-sob-seu-controle\/\">Quem s\u00e3o os detentores dos wallets com bilh\u00f5es de XRP sob seu controle ?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/preprod.investx.fr\/pt\/noticias-cripto\/descubra-por-que-o-ethereum-eth-esta-prestes-a-disparar-esta-semana\/\">Descubra por que o Ethereum (ETH) est\u00e1 prestes a disparar esta semana<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/preprod.investx.fr\/pt\/noticias-cripto\/coinbase-movimentou-25-mil-milhoes-de-dolares-em-bitcoin-o-que-desencadeou-esta-transferencia\/\">Coinbase movimentou 25 mil milh\u00f5es de d\u00f3lares em Bitcoin : O que desencadeou esta transfer\u00eancia ?<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A inform\u00e1tica qu\u00e2ntica avan\u00e7a a um ritmo que preocupa os programadores de Bitcoin. A criptografia ECC, que protege a rede atualmente, corre o risco te\u00f3rico de ser quebrada por essas m\u00e1quinas. As solu\u00e7\u00f5es de seguran\u00e7a levar\u00e3o anos a ser implementadas.<\/p>\n","protected":false},"author":47,"featured_media":113905,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"Bitcoin","_yoast_wpseo_title":"Computadores Qu\u00e2nticos : Um Risco Real para o Bitcoin ?","_yoast_wpseo_metadesc":"An\u00e1lise t\u00e9cnica : Computadores qu\u00e2nticos amea\u00e7am o Bitcoin ? Descubra a vulnerabilidade ECC e solu\u00e7\u00f5es p\u00f3s-qu\u00e2nticas.","footnotes":"","faq_titre":"","questions_frequentes":"","custom_permalink":""},"categories":[42,6],"tags":[],"class_list":["post-113906","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>Computadores Qu\u00e2nticos : Um Risco Real para o Bitcoin ?<\/title>\n<meta name=\"description\" content=\"An\u00e1lise t\u00e9cnica : Computadores qu\u00e2nticos amea\u00e7am o Bitcoin ? 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