{"id":694,"date":"2017-12-26T18:31:19","date_gmt":"2017-12-26T17:31:19","guid":{"rendered":"https:\/\/blockchain-x.eu\/?p=694"},"modified":"2018-03-06T16:14:34","modified_gmt":"2018-03-06T15:14:34","slug":"694","status":"publish","type":"post","link":"https:\/\/theblockchainforgood.org\/index.php\/2017\/12\/26\/694\/","title":{"rendered":"Les blockchains pour effectuer un transfert d\u2019actifs"},"content":{"rendered":"<p><strong>Les usages des bases de donn\u00e9es distribu\u00e9es de type blockchain\u00a0<\/strong><\/p>\n<p>Il n\u2019aura fallu que quelques ann\u00e9es pour que de nombreuses entreprises s\u2019emparent de cette invention et appliquent \u00e0 divers domaines, outre la banque, ce que le Bitcoin r\u00e9invente pour la monnaie\u00a0: passer d\u2019un fonctionnement centralis\u00e9 \u00e0 une organisation d\u00e9centralis\u00e9e. Chacune de ces entreprises d\u00e9ploie des services bas\u00e9s sur un registre distribu\u00e9 dont la promesse, \u00e0 l\u2019instar de la cryptomonnaie, repose sur l\u2019\u00e9limination des tiers de confiance historiques (notaire, administration, soci\u00e9t\u00e9 de gestion de droit d\u2019auteur\u2026). L\u2019utopie dont est porteur ce mod\u00e8le de base de donn\u00e9es peut s\u2019\u00e9tendre \u00e0 tous les domaines n\u00e9cessitant un organe central ou un tiers de confiance, mais \u00e9galement \u00e0 toute activit\u00e9 pour laquelle des \u00e9changes entre de multiples acteurs induisent de nombreux contr\u00f4les, des probl\u00e8mes de logistique, de lourdeur administrative et parfois de corruption.<\/p>\n<p>Comme aux d\u00e9buts de l\u2019automobile, lorsque la France comptait 155 constructeurs en 1914, de nombreuses exp\u00e9rimentations en cours dans le monde t\u00e9moignent de cet engouement pour les\u00a0<em>blockchains<\/em>, dont l\u2019int\u00e9r\u00eat et l\u2019utilit\u00e9 des services propos\u00e9s sont parfois relatifs.<\/p>\n<p>Selon le site\u00a0blockchainfrance.net, les applications se classent en trois cat\u00e9gories\u00a0:<\/p>\n<ul>\n<li>le transfert d\u2019actifs, comme des monnaies \u00e9lectroniques, des titres, des actions ou des obligations ;<\/li>\n<li>la tenue d\u2019un registre, garantissant son int\u00e9grit\u00e9 comme l\u2019\u00e9tablissement d\u2019un cadastre ou la certification de dipl\u00f4mes ;<\/li>\n<li>l\u2019ex\u00e9cution automatique de programmes autonomes, appel\u00e9s\u00a0<em>smart contracts<\/em>.<\/li>\n<\/ul>\n<p><strong>Transfert d\u2019actifs<\/strong><\/p>\n<p>Rappelons que l\u2019article de Satoshi Nakamoto a \u00e9t\u00e9 publi\u00e9 en pleine d\u00e9b\u00e2cle financi\u00e8re, deux ans apr\u00e8s la crise des\u00a0<em>subprimes<\/em>\u00a0aux \u00c9tats-Unis et au moment o\u00f9, en septembre 2008, plusieurs \u00e9tablissements financiers am\u00e9ricains entraient en cessation de paiement.<\/p>\n<p>C\u2019est dans ce contexte que le\u00a0Bitcoin\u00a0a \u00e9t\u00e9 con\u00e7u comme un syst\u00e8me permettant le transfert d\u2019actifs \u00e0 travers une monnaie \u00e9lectronique enti\u00e8rement d\u00e9centralis\u00e9e dont les transactions sont valid\u00e9es et s\u00e9curis\u00e9es par les utilisateurs eux-m\u00eames. D\u2019abord confidentiel, il faudra attendre 2013 pour que la sp\u00e9culation donne un coup de projecteur au Bitcoin, dont le cours, pass\u00e9 de 100 \u00e0\u00a01 000dollars en quelques semaines, attire les foudres et les critiques des professionnels de la banque et des experts de la finance qui furent, et sont encore nombreux, \u00e0 pr\u00e9dire sa mort imminente. Au-del\u00e0 de l\u2019aspect sulfureux du Bitcoin souvent associ\u00e9 au\u00a0<em>darknet<\/em>, force est de constater que le transfert d\u2019actif sans passer par un organe central trouve des applications de bon sens.<\/p>\n<p>Le march\u00e9 du transfert d\u2019argent en est un bon exemple. Selon la Banque mondiale, ce march\u00e9 va repr\u00e9senter 636 milliards de dollars en 2017. Les op\u00e9rateurs de transfert, comme Western Union, prennent quelque 10 %\u00a0de commission sur chaque transaction, et encore plus lorsque les transferts concernent l\u2019Afrique, qui perd ainsi, selon l\u2019ONG Overseas Development Institute, pr\u00e8s de deux milliards de dollars par an. Le transfert d\u2019argent entre particuliers<em>\u00a0via\u00a0<\/em>une\u00a0<em>blockchain<\/em>\u00a0ferait dispara\u00eetre les commissions exorbitantes de ces interm\u00e9diaires. Par exemple, la fondation Stellar, organisme sans but lucratif cr\u00e9\u00e9 en 2014 par Jed McCaled, a pour but de d\u00e9velopper un r\u00e9seau de paiement transfrontalier \u00e0 faible frais, accessible \u00e0 tous et rapide. La cryptomonnaie \u00e9mise par Stellar, appel\u00e9e Lumen, est directement convertie en monnaie fiduciaire locale par des banques partenaires, la compensation ainsi que le r\u00e8glement des transactions transitant par un r\u00e9seau unique op\u00e9r\u00e9 par IBM. Alors qu\u2019un transfert d\u2019argent, assujetti \u00e0 une commission calcul\u00e9e en pourcentage, passe par de nombreux interm\u00e9diaires et prend aujourd\u2019hui plusieurs jours, une transaction entre particuliers<em>\u00a0via\u00a0<\/em>cette\u00a0<em>blockchain<\/em>\u00a0ne co\u00fbte que quelques centimes et est valid\u00e9e en quelques minutes. La plate-forme est actuellement limit\u00e9e aux paiements transfrontaliers en livres britanniques et en dollars fidjiens, mais devrait \u00e0 l\u2019avenir concerner sept autres devises d\u2019\u00c9tats du Pacifique Sud, notamment le dollar australien, le dollar n\u00e9o-z\u00e9landais et le pa\u2019anga des Tonga.<\/p>\n<blockquote class=\"td_pull_quote td_pull_center\"><p><span style=\"font-size: 18pt;\">Les transactions sont valid\u00e9es et s\u00e9curis\u00e9es par les utilisateurs\u00a0eux-m\u00eames<\/span><\/p><\/blockquote>\n<p>Le transfert d\u2019actifs ne concerne pas uniquement les particuliers. Depuis l\u2019automne 2015, les banques et les institutions financi\u00e8res consid\u00e8rent les\u00a0<em>blockchains<\/em>\u00a0comme une opportunit\u00e9 pour \u00e9conomiser d\u2019importants frais li\u00e9s au transfert d\u2019argent. R3 est \u00e0 la fois une start-up am\u00e9ricaine cr\u00e9\u00e9e en septembre 2015 et un consortium regroupant neuf banques \u00e0 son lancement, parmi lesquelles Barclays, Cr\u00e9dit Suisse, Goldman Sachs, JP Morgan (qui a depuis quitt\u00e9 le consortium) ou encore la Royal Bank of Scotland. Rejointes sans plus attendre par d\u2019autres institutions financi\u00e8res dont la Soci\u00e9t\u00e9 G\u00e9n\u00e9rale, BNP Paribas ou encore Natixis, ce sont aujourd\u2019hui quelque 80 \u00e9tablissements financiers du monde entier qui m\u00e8nent de concert des travaux portant sur les\u00a0<em>blockchains<\/em>. Il s\u2019agit, non plus de\u00a0<em>blockchains<\/em>\u00a0publiques et ouvertes \u00e0 tous, mais de\u00a0<em>blockchains<\/em>\u00a0priv\u00e9es, o\u00f9 les n\u0153uds du r\u00e9seau sont pr\u00e9d\u00e9termin\u00e9s. Si la perspective de r\u00e9duction des co\u00fbts pour le secteur bancaire, jusqu\u2019\u00e0 20 milliards de dollars par an, a fait r\u00eaver plus d\u2019un directeur d\u2019institution financi\u00e8re, des tensions li\u00e9es \u00e0 la gouvernance, la concurrence entre les acteurs et l\u2019absence de r\u00e9sultat imm\u00e9diatement op\u00e9rationnel ont d\u00e9j\u00e0 provoqu\u00e9 le d\u00e9part de certains. D\u2019autres initiatives existent, par exemple celle d\u2019UBS, Deutsche Bank, BNY Mellon et Santander, qui souhaitent lancer l\u2019Utility Settlement Coin en 2018, dont le fonctionnement s\u2019inspirerait de la\u00a0<em>blockchain<\/em>\u00a0Bitcoin. Mais\u00a0<em>\u00ab il s\u2019agit plut\u00f4t d\u2019une nouvelle architecture IT permettant de faire de la compensation et du r\u00e8glement plus rapidement \u00bb<\/em>, explique Gonzague Grandval, cofondateur de Paymium<br \/>\n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les usages des bases de donn\u00e9es distribu\u00e9es de type blockchain\u00a0 Il n\u2019aura fallu que quelques ann\u00e9es pour que de nombreuses entreprises s\u2019emparent de cette invention et appliquent \u00e0 divers domaines, outre la banque, ce que le Bitcoin r\u00e9invente pour la monnaie\u00a0: passer d\u2019un fonctionnement centralis\u00e9 \u00e0 une organisation d\u00e9centralis\u00e9e. Chacune de ces entreprises d\u00e9ploie des [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":697,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"episode_type":"","audio_file":"","podmotor_file_id":"","podmotor_episode_id":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","filesize_raw":"","date_recorded":"","explicit":"","block":"","itunes_episode_number":"","itunes_title":"","itunes_season_number":"","itunes_episode_type":"","footnotes":""},"categories":[34],"tags":[],"class_list":["post-694","post","type-post","status-publish","format-standard","has-post-thumbnail","category-blockchain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les blockchains pour effectuer un transfert d\u2019actifs - Blockchain for Good<\/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:\/\/theblockchainforgood.org\/index.php\/2017\/12\/26\/694\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les blockchains pour effectuer un transfert d\u2019actifs - Blockchain for Good\" \/>\n<meta property=\"og:description\" content=\"Les usages des bases de donn\u00e9es distribu\u00e9es de type blockchain\u00a0 Il n\u2019aura fallu que quelques ann\u00e9es pour que de nombreuses entreprises s\u2019emparent de cette invention et appliquent \u00e0 divers domaines, outre la banque, ce que le Bitcoin r\u00e9invente pour la monnaie\u00a0: passer d\u2019un fonctionnement centralis\u00e9 \u00e0 une organisation d\u00e9centralis\u00e9e. 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