{"id":9217,"date":"2016-09-29T16:30:45","date_gmt":"2016-09-29T15:30:45","guid":{"rendered":"https:\/\/www.riskinsight-wavestone.com\/?p=9217"},"modified":"2019-12-31T10:17:26","modified_gmt":"2019-12-31T09:17:26","slug":"blockchain-peut-on-avoir-confiance-sans-limite","status":"publish","type":"post","link":"https:\/\/www.riskinsight-wavestone.com\/en\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/","title":{"rendered":"Peut-on avoir une confiance sans limite dans la Blockchain ?"},"content":{"rendered":"

La garantie de confiance est bien souvent un argument li\u00e9 \u00e0 la Blockchain<\/em>. En effet, la Blockchain<\/em> dispose de qualit\u00e9s s\u00e9curit\u00e9 intrins\u00e8ques\u00a0: son caract\u00e8re d\u00e9centralis\u00e9 et distribu\u00e9 permet une disponibilit\u00e9 forte du syst\u00e8me, la tra\u00e7abilit\u00e9 est assur\u00e9e par la conservation de toutes les transactions dans le registre, et l\u2019int\u00e9grit\u00e9 est garantie par les m\u00e9canismes cryptographiques.<\/p>\n

Malgr\u00e9 tout, de plus en plus d\u2019attaques sur des environnements Blockchain<\/em> sont constat\u00e9es, avec des fraudes s\u2019\u00e9levant souvent \u00e0 plusieurs dizaines de millions d\u2019euros.<\/p>\n

Mais alors, quel niveau de confiance peut-on vraiment accorder \u00e0 cette technologie\u00a0? D\u00e9cryptage des attaques visant la Blockchain<\/em> et retour sur les mesures \u00e0 prendre pour am\u00e9liorer ce niveau de confiance.<\/p>\n

Prot\u00e9ger les services et applications acc\u00e9dant \u00e0 la Blockchain<\/h2>\n

Un membre d\u2019un r\u00e9seau Blockchain est identifi\u00e9 gr\u00e2ce \u00e0 une paire de cl\u00e9s cryptographiques : une cl\u00e9 priv\u00e9e, qui lui permet de signer ses transactions et de b\u00e9n\u00e9ficier des transactions re\u00e7ues\u00a0; et une cl\u00e9 publique, qui permet aux autres membres du r\u00e9seau d\u2019identifier les transactions \u00e9mises de sa part et de lui en transmettre. S\u2019assurer de bien conserver et prot\u00e9ger sa cl\u00e9 priv\u00e9e est donc vital. Or, celle-ci est souvent stock\u00e9e par son propri\u00e9taire sur son ordinateur ou t\u00e9l\u00e9phone, p\u00e9riph\u00e9riques connus pour \u00eatre ais\u00e9ment attaquable.<\/p>\n

Aussi, de plus en plus d\u2019utilisateurs choisissent de confier leur cl\u00e9 priv\u00e9e \u00e0 des interm\u00e9diaires. Force est de constater que la plupart des attaques impactant Bitcoin ont en r\u00e9alit\u00e9 directement cibl\u00e9 ces plateformes interm\u00e9diaires. Il est donc primordial de prot\u00e9ger la manipulation des cl\u00e9s priv\u00e9es et plus globalement l\u2019ensemble des services acc\u00e9dant au r\u00e9seau Blockchain<\/em>.<\/p>\n

Dans le cas d\u2019une Blockchain<\/em> s\u2019appuyant sur des smart-contracts<\/em>, le niveau d\u2019interaction avec l\u2019ext\u00e9rieur du r\u00e9seau peut \u00eatre important, puisque ces derniers s\u2019appuient sur la v\u00e9rification de param\u00e8tres d\u2019entr\u00e9e<\/em>, potentiellement externes au r\u00e9seau. Il n\u2019est alors plus question de s\u00e9curiser seulement les plateformes acc\u00e9dant \u00e0 la Blockchain,<\/em> mais \u00e9galement celles acc\u00e9d\u00e9es par la Blockchain <\/em>pour valider les conditions d\u2019une transaction.<\/p>\n

\n
\"services<\/figure>\n<\/figure>\n
<\/figure>\n

Exemples de services acc\u00e9dant \u00e0 la Blockchain Bitcoin<\/u><\/em><\/p>\n

Surveiller la puissance de calcul des mineurs pour \u00e9viter une attaque 51%<\/h2>\n

L\u2019attaque 51%<\/em> consiste \u00e0 avoir plus de 51% de la puissance de calcul du r\u00e9seau dans le but d\u2019annuler, ajouter ou modifier des transactions pr\u00e9sentes dans un bloc. L\u2019id\u00e9e est de cr\u00e9er une chaine alternative et plus longue que la Blockchain<\/em> existante afin de la remplacer. Cela est rendu possible en exploitant un param\u00e8tre essentiel de la Blockchain<\/em>\u00a0: lorsque deux cha\u00eenes sont concurrentes, la chaine la plus longue est consid\u00e9r\u00e9e comme la chaine l\u00e9gitime.<\/p>\n

\"explicaition<\/figure>\n

Explication de l’attaque 51%<\/em><\/span><\/p>\n

Ce risque est plus important dans le cadre de Blockchains<\/em> priv\u00e9es ou hybrides, compos\u00e9es d\u2019un nombre restreint d\u2019utilisateurs, et pouvant donc plus facilement repr\u00e9senter plus de la moiti\u00e9 de la puissance de calcul. Aussi, des mesures de s\u00e9curit\u00e9 doivent \u00eatre mises en place pour pr\u00e9venir et d\u00e9tecter ce type d\u2019attaque\u00a0: engagements contractuels, m\u00e9canismes de surveillance et de contr\u00f4le, etc.
\n<\/strong><\/p>\n

S\u00e9curiser le code des smart-contracts<\/h2>\n

Un smart-contract<\/em> est un programme informatique inscrit dans une Blockchain<\/em> et qui s\u2019ex\u00e9cute de mani\u00e8re automatique une fois les conditions du contrat r\u00e9unies.<\/p>\n

Les cons\u00e9quences d\u2019une erreur de codage peuvent \u00eatre catastrophiques et difficilement r\u00e9versibles, comme en t\u00e9moigne l\u2019affaire TheDAO<\/em> (application bas\u00e9e sur la Blockchain Ethereum et se pr\u00e9sentant comme un fond d\u2019investissement participatif et mutualis\u00e9). \u00c0 partir d\u2019une vuln\u00e9rabilit\u00e9 d\u00e9couverte dans le code source du smart-contract<\/em> TheDAO<\/em>, un membre du r\u00e9seau a pu drainer le compte principal de l\u2019application \u00e0 hauteur de 50 millions de dollars. Ces fonds furent en partie r\u00e9cup\u00e9r\u00e9s suite \u00e0 une op\u00e9ration appel\u00e9e \u00ab\u00a0hard fork\u00a0\u00bb, s\u2019apparentant \u00e0 une attaque 51% concert\u00e9e.<\/p>\n

En soi, ceci n\u2019\u00e9tait pas une attaque car le contrat a \u00e9t\u00e9 respect\u00e9, seule sa conception \u00e9tait d\u00e9faillante. La cr\u00e9ation de cas d\u2019usage bas\u00e9s sur des smart-contract<\/em>s doit imp\u00e9rativement \u00eatre associ\u00e9e \u00e0 des mesures de s\u00e9curit\u00e9 applicative\u00a0et un d\u00e9veloppement s\u00e9curis\u00e9.<\/p>\n

Un syst\u00e8me Blockchain<\/em> est souvent consid\u00e9r\u00e9 comme s\u00e9curis\u00e9 par nature, mais les attaques pr\u00e9sent\u00e9es t\u00e9moignent du contraire. La nature des plateformes acc\u00e9dant ou acc\u00e9d\u00e9es par la Blockchain<\/em>, la complexit\u00e9 des \u00e9ventuels smart-contracts<\/em> ou le nombre de mineurs du r\u00e9seau sont autant d\u2019\u00e9l\u00e9ments pouvant influer sur la s\u00e9curit\u00e9 du service fourni.<\/p>\n

\"dao\"<\/figure>\n

Affaire TheDAO<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

La garantie de confiance est bien souvent un argument li\u00e9 \u00e0 la Blockchain. En effet, la Blockchain dispose de qualit\u00e9s s\u00e9curit\u00e9 intrins\u00e8ques\u00a0: son caract\u00e8re d\u00e9centralis\u00e9 et distribu\u00e9 permet une disponibilit\u00e9 forte du syst\u00e8me, la tra\u00e7abilit\u00e9 est assur\u00e9e par la conservation…<\/p>\n","protected":false},"author":1246,"featured_media":9234,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"page-templates\/tmpl-one.php","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3223,36],"tags":[2686,3316,1241,2722],"coauthors":[783,1615],"class_list":["post-9217","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud-next-gen-it-security","category-cybersecurity-digital-trust","tag-blockchain","tag-blockchain-security","tag-cyberattaque","tag-smart-contract"],"acf":[],"yoast_head":"\nPeut-on avoir une confiance sans limite dans la Blockchain ? - RiskInsight<\/title>\n<meta name=\"description\" content=\"La confiance est pr\u00e9sent\u00e9e comme une caract\u00e9ristique intrins\u00e8que de la Blockchain, mais des attaques ont r\u00e9ussi \u00e0 compromettre lenvironnement Blockchain.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Peut-on avoir une confiance sans limite dans la Blockchain ? - RiskInsight\" \/>\n<meta property=\"og:description\" content=\"La confiance est pr\u00e9sent\u00e9e comme une caract\u00e9ristique intrins\u00e8que de la Blockchain, mais des attaques ont r\u00e9ussi \u00e0 compromettre lenvironnement Blockchain.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/\" \/>\n<meta property=\"og:site_name\" content=\"RiskInsight\" \/>\n<meta property=\"article:published_time\" content=\"2016-09-29T15:30:45+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-12-31T09:17:26+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1378\" \/>\n\t<meta property=\"og:image:height\" content=\"1378\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Matthieu Garin, StephaneGomez\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Matthieu Garin, StephaneGomez\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/\"},\"author\":{\"name\":\"Matthieu Garin\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/person\/6c4f0c30b01417df346ed7f46d56b935\"},\"headline\":\"Peut-on avoir une confiance sans limite dans la Blockchain ?\",\"datePublished\":\"2016-09-29T15:30:45+00:00\",\"dateModified\":\"2019-12-31T09:17:26+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/\"},\"wordCount\":808,\"publisher\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg\",\"keywords\":[\"blockchain\",\"blockchain security\",\"Cyberattaque\",\"smart-contract\"],\"articleSection\":[\"Cloud & Next-Gen IT Security\",\"Cybersecurity & Digital Trust\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/\",\"url\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/\",\"name\":\"Peut-on avoir une confiance sans limite dans la Blockchain ? - RiskInsight\",\"isPartOf\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg\",\"datePublished\":\"2016-09-29T15:30:45+00:00\",\"dateModified\":\"2019-12-31T09:17:26+00:00\",\"description\":\"La confiance est pr\u00e9sent\u00e9e comme une caract\u00e9ristique intrins\u00e8que de la Blockchain, mais des attaques ont r\u00e9ussi \u00e0 compromettre lenvironnement Blockchain.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage\",\"url\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg\",\"contentUrl\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg\",\"width\":1378,\"height\":1378,\"caption\":\"Vector car rental or sale concept in flat style - hand holding car key\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.riskinsight-wavestone.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Peut-on avoir une confiance sans limite dans la Blockchain ?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#website\",\"url\":\"https:\/\/www.riskinsight-wavestone.com\/en\/\",\"name\":\"RiskInsight\",\"description\":\"The cybersecurity & digital trust blog by Wavestone's consultants\",\"publisher\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.riskinsight-wavestone.com\/en\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#organization\",\"name\":\"Wavestone\",\"url\":\"https:\/\/www.riskinsight-wavestone.com\/en\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2021\/08\/Monogramme\u2013W\u2013NEGA-RGB-50x50-1.png\",\"contentUrl\":\"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2021\/08\/Monogramme\u2013W\u2013NEGA-RGB-50x50-1.png\",\"width\":50,\"height\":50,\"caption\":\"Wavestone\"},\"image\":{\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/person\/6c4f0c30b01417df346ed7f46d56b935\",\"name\":\"Matthieu Garin\",\"url\":\"https:\/\/www.riskinsight-wavestone.com\/en\/author\/matthieu-garin\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Peut-on avoir une confiance sans limite dans la Blockchain ? - RiskInsight","description":"La confiance est pr\u00e9sent\u00e9e comme une caract\u00e9ristique intrins\u00e8que de la Blockchain, mais des attaques ont r\u00e9ussi \u00e0 compromettre lenvironnement Blockchain.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/","og_locale":"en_US","og_type":"article","og_title":"Peut-on avoir une confiance sans limite dans la Blockchain ? - RiskInsight","og_description":"La confiance est pr\u00e9sent\u00e9e comme une caract\u00e9ristique intrins\u00e8que de la Blockchain, mais des attaques ont r\u00e9ussi \u00e0 compromettre lenvironnement Blockchain.","og_url":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/","og_site_name":"RiskInsight","article_published_time":"2016-09-29T15:30:45+00:00","article_modified_time":"2019-12-31T09:17:26+00:00","og_image":[{"width":1378,"height":1378,"url":"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg","type":"image\/jpeg"}],"author":"Matthieu Garin, StephaneGomez","twitter_misc":{"Written by":"Matthieu Garin, StephaneGomez","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#article","isPartOf":{"@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/"},"author":{"name":"Matthieu Garin","@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/person\/6c4f0c30b01417df346ed7f46d56b935"},"headline":"Peut-on avoir une confiance sans limite dans la Blockchain ?","datePublished":"2016-09-29T15:30:45+00:00","dateModified":"2019-12-31T09:17:26+00:00","mainEntityOfPage":{"@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/"},"wordCount":808,"publisher":{"@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#organization"},"image":{"@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage"},"thumbnailUrl":"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg","keywords":["blockchain","blockchain security","Cyberattaque","smart-contract"],"articleSection":["Cloud & Next-Gen IT Security","Cybersecurity & Digital Trust"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/","url":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/","name":"Peut-on avoir une confiance sans limite dans la Blockchain ? - RiskInsight","isPartOf":{"@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage"},"image":{"@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage"},"thumbnailUrl":"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg","datePublished":"2016-09-29T15:30:45+00:00","dateModified":"2019-12-31T09:17:26+00:00","description":"La confiance est pr\u00e9sent\u00e9e comme une caract\u00e9ristique intrins\u00e8que de la Blockchain, mais des attaques ont r\u00e9ussi \u00e0 compromettre lenvironnement Blockchain.","breadcrumb":{"@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#primaryimage","url":"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg","contentUrl":"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2016\/09\/Fotolia_71594375_Subscription_Monthly_M.jpg","width":1378,"height":1378,"caption":"Vector car rental or sale concept in flat style - hand holding car key"},{"@type":"BreadcrumbList","@id":"https:\/\/www.riskinsight-wavestone.com\/2016\/09\/blockchain-peut-on-avoir-confiance-sans-limite\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.riskinsight-wavestone.com\/en\/"},{"@type":"ListItem","position":2,"name":"Peut-on avoir une confiance sans limite dans la Blockchain ?"}]},{"@type":"WebSite","@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#website","url":"https:\/\/www.riskinsight-wavestone.com\/en\/","name":"RiskInsight","description":"The cybersecurity & digital trust blog by Wavestone's consultants","publisher":{"@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.riskinsight-wavestone.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#organization","name":"Wavestone","url":"https:\/\/www.riskinsight-wavestone.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2021\/08\/Monogramme\u2013W\u2013NEGA-RGB-50x50-1.png","contentUrl":"https:\/\/www.riskinsight-wavestone.com\/wp-content\/uploads\/2021\/08\/Monogramme\u2013W\u2013NEGA-RGB-50x50-1.png","width":50,"height":50,"caption":"Wavestone"},"image":{"@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.riskinsight-wavestone.com\/en\/#\/schema\/person\/6c4f0c30b01417df346ed7f46d56b935","name":"Matthieu Garin","url":"https:\/\/www.riskinsight-wavestone.com\/en\/author\/matthieu-garin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/posts\/9217","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/users\/1246"}],"replies":[{"embeddable":true,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/comments?post=9217"}],"version-history":[{"count":9,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/posts\/9217\/revisions"}],"predecessor-version":[{"id":9273,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/posts\/9217\/revisions\/9273"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/media\/9234"}],"wp:attachment":[{"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/media?parent=9217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/categories?post=9217"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/tags?post=9217"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.riskinsight-wavestone.com\/en\/wp-json\/wp\/v2\/coauthors?post=9217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}