{"id":82774,"date":"2022-07-14T05:00:00","date_gmt":"2022-07-14T05:00:00","guid":{"rendered":"https:\/\/fr.cryptonews.com\/?p=82774"},"modified":"2023-06-26T11:06:49","modified_gmt":"2023-06-26T11:06:49","slug":"le-bitcoin-btc-explique-a-un-enfant-de-cinq-ans","status":"publish","type":"post","link":"https:\/\/cryptonews.com\/fr\/exclusives\/le-bitcoin-btc-explique-a-un-enfant-de-cinq-ans\/","title":{"rendered":"Le Bitcoin (BTC) expliqu\u00e9 \u00e0 un enfant de cinq ans (ELI5)"},"content":{"rendered":"<p><i><strong>Note de la r&eacute;daction: Cette s&eacute;rie d&#8217;articles &#8220;ELI5&#8221; est destin&eacute;e aux d&eacute;butants qui d&eacute;barquent dans l&#8217;univers des cryptomonnaies, de la DeFi, des NFT et du Web3 avec plein de questions en t&ecirc;te. ELI5 fait r&eacute;f&eacute;rence au c&eacute;l&egrave;bre acronyme anglophone qui signifie &#8220;Explique-moi comme si j&#8217;avais cinq ans&#8221;. Le but n&#8217;est pas d&#8217;infantiliser le lecteur, mais simplement de lui donner des cl&eacute;s de compr&eacute;hension afin que le vocabulaire compliqu&eacute; de la cryptosph&egrave;re au sens large devienne comme par magie, un jeu d&#8217;enfant! &nbsp;<\/strong><\/i><\/p><figure class=\"image\"><a href=\"https:\/\/go.primexbt.com\/click?pid=396&amp;offer_id=12&amp;l=1594368336&amp;sub1=French\" target=\"_blank\" rel=\"noopener \"><img decoding=\"async\" src=\"https:\/\/cimg.co\/news\/82792\/209731\/primexbt-cet-article.jpg\" srcset=\"https:\/\/cimg.co\/news\/82792\/209731\/responsive-images\/primexbt-cet-article___media_library_original_728_90.jpg 728w, https:\/\/cimg.co\/news\/82792\/209731\/responsive-images\/primexbt-cet-article___media_library_original_720_89.jpg 720w, https:\/\/cimg.co\/news\/82792\/209731\/responsive-images\/primexbt-cet-article___media_library_original_600_74.jpg 600w, https:\/\/cimg.co\/news\/82792\/209731\/responsive-images\/primexbt-cet-article___media_library_original_300_37.jpg 300w\" width=\"728\" class=\"content-img\" alt=\"\"><\/a><\/figure><p>Vous avez sans doute d&eacute;j&agrave; entendu parler du <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/tags\/bitcoin\/\"><strong>Bitcoin<\/strong><\/a> (BTC). &Agrave; chaque fois que la valeur de cette <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/tags\/cryptomonnaies\/\">cryptomonnaie<\/a> tombe en fl&egrave;che, tous les m&eacute;dias en parlent. Mais savez-vous exactement de quoi il s&rsquo;agit ?<\/p><p>Afin de vous &eacute;clairer sur ce qu&rsquo;est r&eacute;ellement le Bitcoin, que l&rsquo;on peut aussi retrouver sous son appellation BTC, nous vous avons concoct&eacute; ce petit <strong>guide &agrave; destination des d&eacute;butants<\/strong>. Nous esp&eacute;rons qu&rsquo;il vous permettra de mieux comprendre en quoi consiste cette cryptomonnaie.<\/p><figure class=\"image\"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" alt=\"\" sizes=\"100vw\" width=\"900\" class=\"content-img lazyload\" data-src=\"https:\/\/cimg.co\/news\/82774\/209458\/bitcoin.jpeg\" data-srcset=\"https:\/\/cimg.co\/news\/82774\/209458\/responsive-images\/bitcoin___media_library_original_900_537.jpeg 900w, https:\/\/cimg.co\/news\/82774\/209458\/responsive-images\/bitcoin___media_library_original_720_429.jpeg 720w, https:\/\/cimg.co\/news\/82774\/209458\/responsive-images\/bitcoin___media_library_original_600_358.jpeg 600w, https:\/\/cimg.co\/news\/82774\/209458\/responsive-images\/bitcoin___media_library_original_300_179.jpeg 300w\"><\/figure><h2>L&rsquo;origine du BTC<\/h2><span class=\"replacer\"><\/span><p>Le Bitcoin est apparu apr&egrave;s la crise des <i>subprimes<\/i> de 2007. Si certains cypherpunks totalement oppos&eacute;s aux banques ont d&eacute;j&agrave; &eacute;mis des id&eacute;es similaires au Bitcoin par le pass&eacute;, ce n&rsquo;est r&eacute;ellement qu&rsquo;en 2008 que le Bitcoin a fait son apparition.<\/p><p>Le 28 octobre 2008, un certain <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/personnalite-crypto-satoshi-nakamoto-3779\/\"><strong>Satoshi Nakamoto<\/strong><\/a>, dont personne ne conna&icirc;t son identit&eacute; r&eacute;elle, a publi&eacute; ce qu&rsquo;on appelle le <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/le-livre-blanc-de-bitcoin-4334\/\"><i>white paper<\/i><\/a> du Bitcoin. Il s&rsquo;agit d&rsquo;un document qui posait les bases de cette future cryptomonnaie.<\/p><p>Cependant, il a fallu attendre le 12 janvier 2009 pour que la premi&egrave;re transaction en BTC soit effectu&eacute;e. Celle-ci s&rsquo;est d&eacute;roul&eacute;e entre le fondateur du Bitcoin, Satoshi Nakamoto, et <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/personnalite-crypto-hal-finney-4348\/\"><strong>Hal Finney<\/strong><\/a>, un c&eacute;l&egrave;bre cryptographe.<\/p><figure class=\"image\"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" alt=\"Hal Finney \/ Photo: YouTube\" class=\" lazyload\" data-src=\"https:\/\/cimg.co\/w\/articles-attachments\/1\/5fd\/1081fad781.png\" data-srcset=\"\"><figcaption>&nbsp;<a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/personnalite-crypto-hal-finney-4348\/\"><strong>Hal Finney<\/strong><\/a><strong> <\/strong>a re&ccedil;u la premi&egrave;re transaction Bitcoin<\/figcaption><\/figure><h2>Le syst&egrave;me de paiement de pair &agrave; pair<\/h2><span class=\"replacer\"><\/span><figure class=\"image\"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" alt=\"\" sizes=\"100vw\" width=\"750\" class=\"content-img lazyload\" data-src=\"https:\/\/cimg.co\/news\/82774\/209459\/p2p.jpeg\" data-srcset=\"https:\/\/cimg.co\/news\/82774\/209459\/responsive-images\/p2p___media_library_original_750_500.jpeg 750w, https:\/\/cimg.co\/news\/82774\/209459\/responsive-images\/p2p___media_library_original_720_480.jpeg 720w, https:\/\/cimg.co\/news\/82774\/209459\/responsive-images\/p2p___media_library_original_600_400.jpeg 600w, https:\/\/cimg.co\/news\/82774\/209459\/responsive-images\/p2p___media_library_original_300_200.jpeg 300w\"><\/figure><p>Avant l&rsquo;invention du Bitcoin, tous les paiements &eacute;lectroniques devaient se faire via l&rsquo;interm&eacute;diaire de ce qu&rsquo;on appelle un tiers de confiance. Dans la plupart des cas, il s&rsquo;agissait d&rsquo;une banque. Cette derni&egrave;re se chargeait alors de transf&eacute;rer l&rsquo;argent pr&eacute;sent sur le compte d&rsquo;une personne ou d&rsquo;une entit&eacute; vers un autre compte.<\/p><p>Avec l&rsquo;invention du Bitcoin, il n&rsquo;&eacute;tait plus n&eacute;cessaire que la banque se charge de s&eacute;curiser les transactions. Mais cela ne signifie pas que l&rsquo;on doit se passer d&rsquo;un tiers de confiance. En effet, si les transactions en BTC sont s&eacute;curis&eacute;es, c&rsquo;est gr&acirc;ce &agrave; ce qu&rsquo;on appelle la blockchain. Celle-ci fait office de tiers de confiance et s&rsquo;assure que les Bitcoins sont bien transf&eacute;r&eacute;s d&rsquo;un individu &agrave; un autre.<\/p><p>Malgr&eacute; tout, de nombreuses personnes font l&rsquo;erreur de dire qu&rsquo;il n&rsquo;y a plus besoin de tiers de confiance. En r&eacute;alit&eacute;, celui-ci n&rsquo;est plus la banque, mais tout simplement la blockchain. Un tiers de confiance est toujours n&eacute;cessaire afin de s&rsquo;assurer de l&rsquo;int&eacute;grit&eacute; des transactions.<\/p><h2>Comment est s&eacute;curis&eacute; le r&eacute;seau ?<\/h2><span class=\"replacer\"><\/span><figure class=\"image\"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" alt=\"\" sizes=\"100vw\" width=\"800\" class=\"content-img lazyload\" data-src=\"https:\/\/cimg.co\/news\/82774\/209460\/btc-net.jpeg\" data-srcset=\"https:\/\/cimg.co\/news\/82774\/209460\/responsive-images\/btc-net___media_library_original_800_443.jpeg 800w, https:\/\/cimg.co\/news\/82774\/209460\/responsive-images\/btc-net___media_library_original_720_398.jpeg 720w, https:\/\/cimg.co\/news\/82774\/209460\/responsive-images\/btc-net___media_library_original_600_332.jpeg 600w, https:\/\/cimg.co\/news\/82774\/209460\/responsive-images\/btc-net___media_library_original_300_166.jpeg 300w\"><figcaption>Photo: Adobe Stock<\/figcaption><\/figure><p>Le gros probl&egrave;me dans l&rsquo;informatique, c&rsquo;est qu&rsquo;il est possible de dupliquer facilement les fichiers. Pendant tr&egrave;s longtemps, il n&rsquo;a donc pas &eacute;t&eacute; possible de mettre au point une monnaie num&eacute;rique &agrave; cause de ce qu&rsquo;on appelle la double d&eacute;pense. Ce terme signifie qu&rsquo;il y avait un risque qu&rsquo;on puisse utiliser un m&ecirc;me Bitcoin plusieurs fois.<\/p><p>Il est &eacute;vident qu&rsquo;une monnaie qui peut &ecirc;tre multipli&eacute;e &agrave; l&rsquo;infini n&rsquo;est pas quelque chose de souhaitable. Au contraire, c&rsquo;est m&ecirc;me quelque chose de dangereux car personne ne voudrait alors l&rsquo;utiliser et la valeur de celle-ci ne vaudrait alors plus rien du tout.<\/p><p>Pour &eacute;viter le probl&egrave;me de la double d&eacute;pense, Satoshi Nakamoto a eu l&rsquo;id&eacute;e de cr&eacute;er la blockchain. Mais pour que celle-ci puisse fonctionner, elle a besoin de ce qu&rsquo;on appelle des mineurs, un terme qui fait bien s&ucirc;r analogie aux mineurs d&rsquo;or, le BTC &eacute;tant consid&eacute;r&eacute; par certaines personnes comme de l&rsquo;or num&eacute;rique.<\/p><h2>Qui sont les mineurs ?<\/h2><span class=\"replacer\"><\/span><figure class=\"image\"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" alt=\"\" sizes=\"100vw\" width=\"700\" class=\"content-img lazyload\" data-src=\"https:\/\/cimg.co\/news\/82774\/209461\/image.jpg\" data-srcset=\"https:\/\/cimg.co\/news\/82774\/209461\/responsive-images\/image___media_library_original_700_299.jpg 700w, https:\/\/cimg.co\/news\/82774\/209461\/responsive-images\/image___media_library_original_600_256.jpg 600w, https:\/\/cimg.co\/news\/82774\/209461\/responsive-images\/image___media_library_original_300_128.jpg 300w\"><figcaption>Afin de s&eacute;curiser les transactions du r&eacute;seau Bitcoin et d&eacute;couvrir de nouveaux BTC, les mineurs entrent en comp&eacute;tition les uns avec les autres. Photo: Adobe Stock<\/figcaption><\/figure><p>Dans le monde des cryptomonnaies, les mineurs ne sont pas des individus poss&eacute;dant un casque et une pioche. Il s&rsquo;agit en fait de personnes ou d&rsquo;entreprises qui poss&egrave;dent ce que l&rsquo;on appelle de la puissance de calcul. En d&rsquo;autres termes, ce sont des individus qui ont &agrave; leur disposition du mat&eacute;riel informatique qui est capable de r&eacute;soudre des &eacute;quations math&eacute;matiques.<\/p><p>Afin de s&eacute;curiser les transactions du r&eacute;seau Bitcoin et d&eacute;couvrir de nouveaux BTC, les mineurs entrent en comp&eacute;tition les uns avec les autres. Le premier qui r&eacute;ussit &agrave; r&eacute;soudre l&rsquo;&eacute;quation math&eacute;matique empoche ce qu&rsquo;on appelle une r&eacute;compense de bloc.<\/p><p>Un bloc a une dur&eacute;e de 15 minutes et regroupe toutes les transactions qui se sont d&eacute;roul&eacute;es durant cette p&eacute;riode. Lorsqu&rsquo;un bloc est d&eacute;couvert, le mineur empoche 50 BTC. Cette r&eacute;compense est divis&eacute;e en 2 tous les 210.000 blocs. Elle est actuellement de 6.25 BTC par bloc cr&eacute;&eacute;. Au total, il ne pourra y avoir que 21 millions de Bitcoins en circulation.<\/p><h2>Le Bitcoin : ce qu&rsquo;il faut retenir<\/h2><span class=\"replacer\"><\/span><p>Si d&rsquo;autres projets de monnaie num&eacute;rique ont &eacute;t&eacute; propos&eacute;s bien avant le Bitcoin, c&rsquo;est toutefois la premi&egrave;re cryptomonnaie &agrave; avoir &eacute;t&eacute; pleinement fonctionnelle. Cela a &eacute;t&eacute; possible gr&acirc;ce &agrave; la blockchain qui a r&eacute;solu le probl&egrave;me de la double d&eacute;pense.<\/p><p>Pour fonctionner, le r&eacute;seau a besoin d&rsquo;une &eacute;quipe de v&eacute;rification que l&rsquo;on appelle les mineurs. Ceux-ci doivent r&eacute;soudre des op&eacute;rations math&eacute;matiques complexes afin de pouvoir cr&eacute;er un bloc et empocher la r&eacute;compense qui est li&eacute; &agrave; celui-ci.<\/p><p>Le Bitcoin est encore aujourd&rsquo;hui l&rsquo;actif num&eacute;rique le plus populaire. Sa valeur &eacute;tait inf&eacute;rieure &agrave; 10 centimes de dollars lors des premiers &eacute;changes et a grimp&eacute; jusqu&rsquo;&agrave; 68 789$ le 10 novembre 2021.<\/p><p><i><strong>Lisez les autres articles de notre s&eacute;rie sp&eacute;ciale d&eacute;butants:<\/strong><\/i><br><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/la-blockchain-expliquee-a-un-enfant-de-cinq-ans\/\"><i><strong>La blockchain expliqu&eacute;e &agrave; un enfant de cinq ans<\/strong><\/i><\/a><br><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/la-cryptomonnaie-expliquee-a-un-enfant-de-cinq-ans\/\"><i><strong>La cryptomonnaie expliqu&eacute;e &agrave; un enfant de cinq ans (ELI5)<\/strong><\/i><\/a><i><strong>.<\/strong><\/i><\/p><p><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/guide-de-la-terminologie-crypto-1435\/\"><u>D&eacute;couvrir plus de termes du vocabulaire crypto<\/u><\/a><\/p><figure class=\"image\"><a href=\"https:\/\/go.primexbt.com\/click?pid=396&amp;offer_id=12&amp;l=1594368336&amp;sub1=French\" target=\"_blank\" rel=\"noopener \"><img decoding=\"async\" src=\"https:\/\/cimg.co\/p\/no_image.svg\" width=\"728\" class=\"content-img lazyload\" alt=\"\" data-src=\"https:\/\/cimg.co\/news\/82792\/209774\/primexbt-cet-article.jpg\" data-srcset=\"https:\/\/cimg.co\/news\/82792\/209774\/responsive-images\/primexbt-cet-article___media_library_original_728_90.jpg 728w, https:\/\/cimg.co\/news\/82792\/209774\/responsive-images\/primexbt-cet-article___media_library_original_720_89.jpg 720w, https:\/\/cimg.co\/news\/82792\/209774\/responsive-images\/primexbt-cet-article___media_library_original_600_74.jpg 600w, https:\/\/cimg.co\/news\/82792\/209774\/responsive-images\/primexbt-cet-article___media_library_original_300_37.jpg 300w\"><\/a><\/figure><p><i>Ce texte n&#8217;est pas un conseil &agrave; l&#8217;investissement. Faites vos propres recherches et n&#8217;investissez que l&#8217;argent que vous pouvez vous permettre de perdre.<\/i><\/p><p><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/cryptonews.com\/fr\/exclusives\/guide-de-la-terminologie-crypto-1435\/\"><u>D&eacute;couvrir plus de termes du vocabulaire crypto<\/u><\/a><\/p><h3><strong>Suivez nos liens d&#8217;affili&eacute;s:<\/strong><\/h3><ul><li><strong>Pour acheter des cryptomonnaies en Zone SEPA, Europe et citoyens fran&ccedil;ais<\/strong>, visitez <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.coinhouse.com\/r\/179207\">Coinhouse<\/a><\/li><li><strong>Pour acheter des cryptomonnaies au Canada<\/strong>, visitez <a target=\"_blank\" rel=\"noopener  sponsored nofollow\" href=\"https:\/\/rapi.cryptonews.com\/ext\/bitbuy\/fr\">Bitbuy<\/a><\/li><li><strong>Pour g&eacute;n&eacute;rer des int&eacute;r&ecirc;ts gr&acirc;ce &agrave; vos bitcoins<\/strong>, allez sur le site de <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/blockfi.mxuy67.net\/kqG6x\">BlockFi<\/a><\/li><li><strong>Pour s&eacute;curiser ou stocker vos cryptomonnaies<\/strong>, procurez-vous les portefeuilles <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/shop.ledger.com\/?r=12b53b98a1c0&amp;tracker=CN-FR\">Ledger<\/a> ou <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/shop.trezor.io\/?offer_id=82&amp;aff_id=1814\">Trezor<\/a><\/li><li><strong>Pour transiger vos cryptos de fa&ccedil;on anonyme<\/strong>, installez l&#8217;application <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/go.nordvpn.net\/aff_c?offer_id=252&amp;aff_id=54152&amp;url_id=14818\">NordVPN<\/a><\/li><\/ul><p><strong>Pour investir dans le minage de cryptomonnaies ou les masternodes:<\/strong><\/p><ul><li><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/feel-mining.com\/?tracking=1ED831AFAB\">Feel Mining<\/a><\/li><li><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.just-mining.com\/register?sponsor=aNJ7nRa0m3qvgi6LkMXAZX506\">Just Mining<\/a><\/li><\/ul><p><strong>Pour accumuler des cryptos en jouant :<\/strong><\/p><ul><li>Au poker sur la plateforme de jeux <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/coinpoker.com\/crypto\">CoinPoker<\/a><\/li><li>&Agrave; un fantasy football mondial sur la plateforme <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/sorare.pxf.io\/c\/2102999\/902742\/12209\">Sorare<\/a><\/li><\/ul><p>Restez inform&eacute; gr&acirc;ce &agrave; <a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.getrevue.co\/profile\/CryptonewsFR\"><strong>notre newsletter hebdomadaire gratuite<\/strong><\/a><strong> <\/strong>et &agrave; nos r&eacute;seaux sociaux:<\/p><ul><li><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/twitter.com\/cryptonews_FR\"><strong>Twitter<\/strong><\/a><strong>&nbsp;<\/strong><\/li><li><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/t.me\/cryptonews_FR\"><strong>Telegram<\/strong><\/a><\/li><li><a target=\"_blank\" rel=\"noopener \" href=\"https:\/\/www.linkedin.com\/company\/11745115\"><strong>LinkedIn<\/strong><\/a><\/li><\/ul>","protected":false},"excerpt":{"rendered":"<p>Note de la r&eacute;daction: Cette s&eacute;rie d&#8217;articles &#8220;ELI5&#8221; est destin&eacute;e aux d&eacute;butants qui d&eacute;barquent dans l&#8217;univers des cryptomonnaies, de la DeFi, des NFT et du Web3 avec plein de questions en t&ecirc;te. ELI5 fait r&eacute;f&eacute;rence au c&eacute;l&egrave;bre acronyme anglophone qui signifie &#8220;Explique-moi comme si j&#8217;avais cinq ans&#8221;. Le but n&#8217;est pas d&#8217;infantiliser le lecteur, mais [&hellip;]<\/p>\n","protected":false},"author":35,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,2],"tags":[44,179],"editors":[2002],"sponsored_companies":[],"class_list":["post-82774","post","type-post","status-publish","format-standard","hentry","category-features","category-exclusives","tag-bitcoin","tag-satoshi-nakamoto","editors-nicolas-i"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pr\u00e9senter le Bitcoin (BTC) \u00e0 un enfant de cinq<\/title>\n<meta name=\"description\" content=\"Comment expliquer ce qu&#039;est Bitcoin en termes simples \u00e0 un enfant de cinq ans ?\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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