{"id":1610,"date":"2023-06-01T10:00:28","date_gmt":"2023-06-01T08:00:28","guid":{"rendered":"https:\/\/www.ceres-advisory.io\/?p=1610"},"modified":"2023-06-07T12:03:30","modified_gmt":"2023-06-07T10:03:30","slug":"les-avantages-et-inconvenients-dune-blockchain-privee-et-publique","status":"publish","type":"post","link":"https:\/\/www.ceres-advisory.io\/index.php\/2023\/06\/01\/les-avantages-et-inconvenients-dune-blockchain-privee-et-publique\/","title":{"rendered":"Les avantages et inconv\u00e9nients d&rsquo;une Blockchain priv\u00e9e et publique"},"content":{"rendered":"<div class=\"et_d4_element et_pb_section et_pb_section_0  et_pb_css_mix_blend_mode et_section_regular et_block_section\" >\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_d4_element et_pb_row et_pb_row_0  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_0  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_0  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><h3><strong>Qu'est-ce qu'une blockchain ?<\/strong><\/h3><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_1  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p><strong><em>Hassan\u00a0:<\/em><\/strong> \u00ab\u00a0Une blockchain est une technologie qui se base sur un registre de donn\u00e9es distribu\u00e9es. Pour enregistrer une nouvelle transaction ou une nouvelle donn\u00e9e sur ce registre, il va falloir faire participer les n\u0153uds du r\u00e9seau, ce sont donc eux qui vont valider les nouvelles transactions, c'est ce qu'on appelle un r\u00e9seau d\u00e9centralis\u00e9. On peut donc se passer d'un tiers de confiance, on a une s\u00e9curit\u00e9 accrue.\u00a0\u00bb<\/p><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_divider_0 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><div class=\"et_d4_element et_pb_row et_pb_row_1  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_1  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_2  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><h3><strong>Quelle est la diff\u00e9rence entre une blockchain publique et priv\u00e9e ?<\/strong><\/h3><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_3  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p><strong><em>Hassan\u00a0:<\/em><\/strong> \u00ab\u00a0Une blockchain publique par d\u00e9finition est une blockchain dont l'acc\u00e8s n'est pas restreint.<\/p>\n<p>Tout le monde peut y acc\u00e9der, participer \u00e0 la s\u00e9curisation de ce r\u00e9seau, et les transactions qui y sont stock\u00e9es sont disponibles de mani\u00e8re transparente, on peut y acc\u00e9der via un block explorer.<\/p>\n<p>L'exemple le plus connu est la blockchain du Bitcoin qui permet de mani\u00e8re tr\u00e8s simple de r\u00e9aliser des transactions de paiement n'importe o\u00f9 dans le monde, de mani\u00e8re tr\u00e8s simple, avec un co\u00fbt d\u00e9risoire.<\/p>\n<p>Une blockchain priv\u00e9e par d\u00e9finition va avoir un acc\u00e8s restreint, elle va \u00eatre administr\u00e9e par un ensemble de soci\u00e9t\u00e9s ou de compagnies qui composent son r\u00e9seau.<\/p>\n<p>Les transactions ne sont pas disponibles et ne sont pas ouvertes \u00e0 tous Un exemple courant, c'est la blockchain Hyperledger qui va permettre de d\u00e9velopper des uses cases tr\u00e8s complexes \u00a0et qui va permettre in fine de s'adapter au contexte de ce consortium de soci\u00e9t\u00e9s, compagnies, qu'ils soient internes ou externes \u00e0 leurs propres int\u00e9r\u00eats.\u00a0\u00bb<\/p><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_divider_1 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><div class=\"et_d4_element et_pb_row et_pb_row_2  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_2  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_4  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><h3><strong>Quels avantages et inconv\u00e9nients pour l\u2019une et pour l\u2019autre ?<\/strong><\/h3><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_5  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p><strong><em>Hassan\u00a0: <\/em><\/strong>\u00ab Les avantages et inconv\u00e9nients pour l'une et pour l'autre sont notables Les avantages d'une blockchain publique vont \u00eatre son tr\u00e8s haut niveau de s\u00e9curit\u00e9, qui est g\u00e9n\u00e9ralement accompagn\u00e9 d'un r\u00e9seau de n\u0153uds \u00e9tendus et donc tr\u00e8s d\u00e9centralis\u00e9 Il en r\u00e9sulte pour les donn\u00e9es qui y sont stock\u00e9es, une protection contre la falsification ou toute autre tentative de corruption tr\u00e8s importante.<\/p>\n<p>La contrepartie va \u00eatre une performance plus limit\u00e9e surtout dans le cas o\u00f9 le volume de transaction est important.<\/p>\n<p>Enfin, le co\u00fbt de ces transactions peut \u00eatre al\u00e9atoire dans le cas o\u00f9 il y a congestion sur ces r\u00e9seaux ou encombrement<\/p>\n<p>Une blockchain priv\u00e9e quant \u00e0 elle va permettre une meilleure ma\u00eetrise des co\u00fbts et une meilleure optimisation de la performance puisqu'elle est con\u00e7ue pour cet usage sp\u00e9cifique.<\/p>\n<p>En contrepartie, le niveau de s\u00e9curit\u00e9, peut \u00eatre moindre puisque le r\u00e9seau va \u00eatre moins dense, on peut donc avoir un plus fort impact sur la protection de ses donn\u00e9es, Il faut donc veiller \u00e0 s\u00e9curiser de mani\u00e8re sp\u00e9cifique cette blockchain.\u00a0\u00bb<\/p><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_divider_2 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><div class=\"et_d4_element et_pb_row et_pb_row_3  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_3  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_6  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><h3><strong>Comment faire le bon choix ?<\/strong><\/h3><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_7  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p><strong><em>Hassan\u00a0:<\/em><\/strong> \u00ab Tout d'abord, il faut se rappeler que la blockchain est une solution parmi d'autres.<\/p>\n<p>Ensuite pour choisir parmi les dizaines de solutions disponibles, il faut avoir une tr\u00e8s bonne compr\u00e9hension de l'usage que l'on souhaite en faire, du contexte, et des contraintes qui vont s'appliquer sur\u00a0<\/p>\n<p>Parmi les questions cl\u00e9s que l'on doit se poser :<\/p>\n<ul>\n<li>Premi\u00e8rement, la typologie de donn\u00e9es que l'on va stocker et v\u00e9hiculer sur cette blockchain y compris leur niveau de sensibilit\u00e9<\/li>\n<li>Deuxi\u00e8me question \u00e0 se poser, c'est le volume, la performance, et les d\u00e9lais qui vont s'appliquer \u00e0 ces transactions<\/li>\n<li>Troisi\u00e8me \u00e9l\u00e9ment concerne la s\u00e9curisation de cette blockchain et comment on veut op\u00e9rer la validation de ces transactions<\/li>\n<li>Et enfin ne pas oublier les co\u00fbts de mise en \u0153uvre et les moyens pour r\u00e9aliser le projet.\u00a0\u00bb<\/li>\n<\/ul><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_divider_3 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><div class=\"et_d4_element et_pb_row et_pb_row_4  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_4  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_divider_4 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_8  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p style=\"text-align: center;\">Un projet ? Une probl\u00e9matique ?<\/p><\/div>\n\t\t\t<\/div><div class=\"et_pb_button_module_wrapper et_pb_button_0_wrapper et_pb_button_alignment_center et_pb_module \">\n\t\t\t\t<a class=\"et_pb_button et_d4_element et_pb_button_0 et_pb_bg_layout_light et_block_module\" href=\"https:\/\/www.ceres-advisory.io\/#contact\" target=\"_blank\">Contactez-nous<\/a>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_divider_5 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><div class=\"et_d4_element et_pb_row et_pb_row_5  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_5  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_divider_6 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div><div class=\"et_pb_module et_d4_element et_pb_image et_pb_image_0\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<span class=\"et_pb_image_wrap \"><img loading=\"lazy\" decoding=\"async\" width=\"620\" height=\"546\" src=\"https:\/\/www.ceres-advisory.io\/wp-content\/uploads\/2023\/03\/hassan-Cabinet-Conseil-CabinetConseil-blockchain-cryptomonnaie-crypto-web-nft-bitcoin-transformation-paiement-monnaie-web3.0-nouvelle-technologie-innovation.png\" alt=\"Cabinet-Conseil-CabinetConseil-blockchain-cryptomonnaie-crypto-web-nft-bitcoin-transformation-paiement-monnaie-web3.0-nouvelle technologie-transaction-tech-numerique-digitalisation-digital-strategie-tech-syst\u00e8me d&#039;information-SI-innovation\" title=\"hassan-Cabinet-Conseil-CabinetConseil-blockchain-cryptomonnaie-crypto-web-nft-bitcoin-transformation-paiement-monnaie-web3.0-nouvelle technologie-innovation\" srcset=\"https:\/\/www.ceres-advisory.io\/wp-content\/uploads\/2023\/03\/hassan-Cabinet-Conseil-CabinetConseil-blockchain-cryptomonnaie-crypto-web-nft-bitcoin-transformation-paiement-monnaie-web3.0-nouvelle-technologie-innovation.png 620w, https:\/\/www.ceres-advisory.io\/wp-content\/uploads\/2023\/03\/hassan-Cabinet-Conseil-CabinetConseil-blockchain-cryptomonnaie-crypto-web-nft-bitcoin-transformation-paiement-monnaie-web3.0-nouvelle-technologie-innovation-480x423.png 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 620px, 100vw\" class=\"wp-image-1082\" \/><\/span>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_9  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p style=\"text-align: center;\"><em>Hassan El Bakkali, Directeur Associ\u00e9 chez Ceres Advisory<\/em><\/p><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_divider_7 et_pb_space et_pb_divider_hidden\"><div class=\"et_pb_divider_internal\"><\/div><\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":1631,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[7],"tags":[],"class_list":["post-1610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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