{"id":119485,"date":"2021-03-02T03:00:18","date_gmt":"2021-03-02T11:00:18","guid":{"rendered":"\/blogs\/?p=119485"},"modified":"2025-05-15T00:40:34","modified_gmt":"2025-05-15T07:40:34","slug":"securite-bitcoin-les-menaces-du-minage-que-vous-devez-connaitre","status":"publish","type":"post","link":"https:\/\/www.mcafee.com\/blogs\/fr-fr\/internet-security\/securite-bitcoin-les-menaces-du-minage-que-vous-devez-connaitre\/","title":{"rendered":"S\u00e9curit\u00e9 Bitcoin : les menaces du minage que vous devez conna\u00eetre"},"content":{"rendered":"<p>Depuis sa cr\u00e9ation en 2013, le bitcoin a connu des hauts et des bas. Toutefois la r\u00e9cente mont\u00e9e en fl\u00e8che de sa valeur a suscit\u00e9 un regain d&#8217;int\u00e9r\u00eat pour cette monnaie virtuelle. La croissance rapide de cette monnaie alternative a fait la une des journaux et est \u00e0 l&#8217;origine d&#8217;un boom des cryptomonnaies. Les consommateurs du monde entier se demandent maintenant comment en profiter. Pour ceux qui souhaitent rejoindre le mouvement sans \u00e9changer de devises traditionnelles comme les dollars am\u00e9ricains (c&#8217;est-\u00e0-dire, de la monnaie fiduciaire), un processus appel\u00e9 le \u00ab\u00a0minage de bitcoins\u00a0\u00bb constitue un bon point de d\u00e9part. Toutefois, le minage de bitcoins pr\u00e9sente un certain nombre de risques de s\u00e9curit\u00e9 qu&#8217;il vaut mieux conna\u00eetre.<\/p>\n<h2><strong>Qu&#8217;est-ce que le minage de bitcoins\u00a0?<\/strong><\/h2>\n<p>Le minage de bitcoins est comparable \u00e0 l&#8217;extraction d&#8217;or\u00a0: vous travaillez et vous obtenez votre r\u00e9compense. Cependant, au lieu d&#8217;un travail \u00e9reintant, c&#8217;est votre temps et la puissance de calcul de votre ordinateur qui vous permettent d&#8217;obtenir la monnaie. Les \u00ab\u00a0mineurs\u00a0\u00bb, comme on les appelle, maintiennent et s\u00e9curisent le syst\u00e8me comptable d\u00e9centralis\u00e9 du bitcoin.<\/p>\n<p>Les transactions en bitcoins sont enregistr\u00e9es dans la \u00ab\u00a0blockchain\u00a0\u00bb, un registre num\u00e9rique. Les mineurs de bitcoins mettent \u00e0 jour le registre en t\u00e9l\u00e9chargeant un logiciel sp\u00e9cial qui leur permet de v\u00e9rifier et de collecter de nouvelles transactions. Ensuite, ils doivent r\u00e9soudre un probl\u00e8me math\u00e9matique pour obtenir l&#8217;acc\u00e8s \u00e0 la cha\u00eene et y ajouter un bloc de transactions. En \u00e9change, ils empochent des bitcoins, ainsi que des frais de transaction.<\/p>\n<h2><strong>Quels sont les risques de s\u00e9curit\u00e9 li\u00e9s aux bitcoins\u00a0?<\/strong><\/h2>\n<p>Au fur et \u00e0 mesure de l&#8217;\u00e9volution de la monnaie num\u00e9rique, le minage de bitcoins est devenu plus difficile. Au d\u00e9but, un utilisateur de bitcoins pouvait miner sur son ordinateur personnel et gagner une bonne quantit\u00e9 de cette cryptomonnaie, mais d\u00e9sormais, les probl\u00e8mes math\u00e9matiques sont devenus si compliqu\u00e9s qu&#8217;ils n\u00e9cessitent une puissance de calcul tr\u00e8s co\u00fbteuse.<\/p>\n<p>C&#8217;est cela qui entra\u00eene la plupart des risques. Puisque les mineurs ont besoin d&#8217;une puissance de calcul de plus en plus importante pour gagner des bitcoins, certains d&#8217;entre eux compromettent des r\u00e9seaux Wi-Fi publics pour acc\u00e9der aux appareils des utilisateurs. C&#8217;est ce qui a eu lieu dans un caf\u00e9 de Buenos Aires\u00a0: le r\u00e9seau a \u00e9t\u00e9 infect\u00e9 par un malware qui causait un d\u00e9calage de 10\u00a0secondes lorsque les utilisateurs s&#8217;y connectaient. Les auteurs du malware utilisaient ce d\u00e9calage pour acc\u00e9der aux ordinateurs portables des utilisateurs afin de miner de la cryptomonnaie.<\/p>\n<p>Outre les r\u00e9seaux Wi-Fi publics, des millions de sites web sont compromis dans le but d&#8217;acc\u00e9der aux appareils des utilisateurs pour miner de la cryptomonnaie. Lorsqu&#8217;un attaquant charge un logiciel de minage sur un appareil sans l&#8217;autorisation de son propri\u00e9taire, on appelle cela du minage de cryptomonnaie malveillant ou \u00ab\u00a0cryptojacking\u00a0\u00bb. On estime qu&#8217;environ 50\u00a0appareils sur 100\u00a0000 en ont \u00e9t\u00e9 victimes.<\/p>\n<p>Le cryptojacking est un probl\u00e8me r\u00e9pandu qui peut ralentir votre appareil, mais ce n&#8217;est pas sa cons\u00e9quence la plus grave. Vos factures d&#8217;\u00e9lectricit\u00e9 risquent \u00e9galement d&#8217;exploser. Si votre appareil est victime de cryptojacking, jusqu&#8217;\u00e0 100\u00a0% de ses ressources peuvent \u00eatre d\u00e9tourn\u00e9es pour miner de la cryptomonnaie, entra\u00eenant une surchauffe pouvant le rendre inutilisable.<\/p>\n<h2><strong>Conseils en mati\u00e8re de confidentialit\u00e9 li\u00e9e aux bitcoins <\/strong><\/h2>\n<p>Maintenant que vous en savez un peu plus sur le minage de bitcoins et les risques de s\u00e9curit\u00e9 qui y sont associ\u00e9s, voici quelques conseils pour prot\u00e9ger vos appareils alors que vous surveillez le march\u00e9 des cryptomonnaies\u00a0:<\/p>\n<ul>\n<li><strong>\u00c9vitez les r\u00e9seaux Wi-Fi publics<\/strong><strong>:<\/strong> ces r\u00e9seaux ne sont g\u00e9n\u00e9ralement pas s\u00e9curis\u00e9s\u00a0; vous exposez donc vos appareils et vos informations \u00e0 un certain nombre de menaces en les utilisant.<\/li>\n<li><strong>Utilisez un VPN\u00a0:<\/strong>si vous n&#8217;avez pas acc\u00e8s \u00e0 votre r\u00e9seau domestique ou professionnel s\u00e9curis\u00e9, pensez \u00e0 utiliser un r\u00e9seau priv\u00e9 virtuel (VPN). Un VPN est un logiciel qui vous donne acc\u00e8s \u00e0 une connexion Internet s\u00e9curis\u00e9e, afin que personne ne puisse intercepter ou lire vos donn\u00e9es. Un produit tel que\u00a0<a href=\"https:\/\/www.mcafee.com\/fr-fr\/vpn\/mcafee-safe-connect.html#!\/\">McAfee Safe Connect<\/a> peut vous aider \u00e0 prot\u00e9ger votre confidentialit\u00e9 en ligne o\u00f9 que vous soyez.<\/li>\n<li><strong>S\u00e9curisez vos appareils\u00a0: <\/strong>de nouvelles menaces li\u00e9es aux bitcoins, de nouveaux risques de s\u00e9curit\u00e9 et de nouveaux malwares apparaissent sans cesse. Prot\u00e9gez vos appareils et vos donn\u00e9es avec\u00a0<a href=\"https:\/\/www.mcafee.com\/consumer\/fr-fr\/store\/m0\/catalog.html\">un logiciel de s\u00e9curit\u00e9 complet<\/a>.<\/li>\n<\/ul>\n<h2><strong>Restez inform\u00e9<\/strong><\/h2>\n<p>Consultez les actualit\u00e9s de\u00a0<a href=\"https:\/\/www.mcafee.com\/fr-fr\/index.html\">McAfee<\/a>\u00a0et soyez au courant des derni\u00e8res menaces pour la s\u00e9curit\u00e9 mobile et grand public en suivant\u00a0<a href=\"https:\/\/twitter.com\/McAfee_FR\">@McAfee_FR<\/a>\u00a0sur Twitter, en vous abonnant pour recevoir nos\u00a0<a href=\"https:\/\/www.mcafee.com\/consumer\/en-us\/landing-page\/direct\/dr\/social\/generic\/newsletter.html?csrc=social&amp;csrcl2=blog&amp;cctype=newsletter_signup&amp;ccstype=&amp;ccoe=direct&amp;ccoel2=dr&amp;pkg_id=521&amp;affid=0\">e-mails<\/a>, en \u00e9coutant notre podcast\u00a0<a href=\"https:\/\/geo.itunes.apple.com\/podcast\/us\/id1257232208?mt=2&amp;at=1010lbVy&amp;ct=mcafeehackable_GaryBlog_EndBlurb\">Hackable?<\/a> (en anglais) et en nous suivant sur\u00a0<a href=\"https:\/\/www.facebook.com\/McAfee\">Facebook.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Depuis sa cr\u00e9ation en 2013, le bitcoin a connu des hauts et des bas. Toutefois la r\u00e9cente mont\u00e9e en fl\u00e8che&#8230;<\/p>\n","protected":false},"author":674,"featured_media":141400,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[12001,11941],"tags":[14857,16506],"coauthors":[16367],"class_list":["post-119485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-privacy-identity-protection","category-internet-security","tag-cryptomonnaie","tag-cybersecurite-fr-fr"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>S\u00e9curit\u00e9 Bitcoin : les menaces du minage que vous devez conna\u00eetre | Blog McAfee<\/title>\n<meta name=\"description\" content=\"Depuis sa cr\u00e9ation en 2013, le bitcoin a connu des hauts et des bas. 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