{"id":1894,"date":"2025-03-27T10:47:29","date_gmt":"2025-03-27T10:47:29","guid":{"rendered":"https:\/\/www.captcha.eu\/?p=1894"},"modified":"2025-04-30T09:57:32","modified_gmt":"2025-04-30T09:57:32","slug":"captcha-what-it-is-how-it-works-and-why-data-privacy-matters","status":"publish","type":"post","link":"https:\/\/new.captcha.eu\/fr\/captcha-quest-ce-que-cest-comment-ca-marche-et-pourquoi-la-confidentialite-des-donnees-est-importante\/","title":{"rendered":"CAPTCHA\u00a0: d\u00e9finition, fonctionnement et importance de la confidentialit\u00e9 des donn\u00e9es"},"content":{"rendered":"<figure class=\"wp-block-image size-full is-resized\"><img data-dominant-color=\"746f67\" data-has-transparency=\"true\" fetchpriority=\"high\" decoding=\"async\" width=\"960\" height=\"540\" sizes=\"(max-width: 960px) 100vw, 960px\" src=\"https:\/\/www.captcha.eu\/wp-content\/uploads\/2025\/03\/Design-ohne-Titel7.png\" alt=\"\" class=\"wp-image-1895 has-transparency\" style=\"--dominant-color: #746f67; width:1180px;height:auto\" srcset=\"https:\/\/new.captcha.eu\/wp-content\/uploads\/2025\/03\/Design-ohne-Titel7.png 960w, https:\/\/new.captcha.eu\/wp-content\/uploads\/2025\/03\/Design-ohne-Titel7-300x169.png 300w, https:\/\/new.captcha.eu\/wp-content\/uploads\/2025\/03\/Design-ohne-Titel7-768x432.png 768w, https:\/\/new.captcha.eu\/wp-content\/uploads\/2025\/03\/Design-ohne-Titel7-18x10.png 18w\" \/><figcaption class=\"wp-element-caption\">Copyright : G\u00e9n\u00e9r\u00e9 via Gemini<\/figcaption><\/figure>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table des mati\u00e8res<\/h2><ul><li><a href=\"#h-what-is-captcha-and-what-is-it-used-for\" data-level=\"2\">Qu&#039;est-ce que le CAPTCHA et \u00e0 quoi sert-il ?<\/a><\/li><li><a href=\"#h-what-types-of-captcha-s-exist\" data-level=\"2\">Quels types de CAPTCHA existent ?<\/a><\/li><li><a href=\"#h-advantages-and-disadvantages-of-captcha-systems\" data-level=\"2\">Avantages et inconv\u00e9nients des syst\u00e8mes CAPTCHA<\/a><\/li><li><a href=\"#h-privacy-aspects-the-difference-between-us-and-european-solutions\" data-level=\"2\">Aspects de la confidentialit\u00e9\u00a0: la diff\u00e9rence entre les solutions am\u00e9ricaines et europ\u00e9ennes<\/a><\/li><li><a href=\"#h-conclusion-making-the-right-captcha-choice\" data-level=\"2\">Conclusion\u00a0: faire le bon choix de CAPTCHA<\/a><\/li><\/ul><\/div>\n\n\n\n<p>Dans le monde num\u00e9rique, nous sommes r\u00e9guli\u00e8rement confront\u00e9s \u00e0 de petits contr\u00f4les de s\u00e9curit\u00e9 nous demandant de s\u00e9lectionner des images, de d\u00e9chiffrer des lettres d\u00e9form\u00e9es ou simplement de cocher une case. Ces obstacles ont une fonction importante\u00a0: ils prot\u00e8gent les sites web des attaques automatis\u00e9es. Mais comment fonctionnent exactement ces m\u00e9canismes de protection et que faut-il prendre en compte en mati\u00e8re de confidentialit\u00e9 des donn\u00e9es\u00a0?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-captcha-and-what-is-it-used-for\">Qu&#039;est-ce que le CAPTCHA et \u00e0 quoi sert-il ?<\/h2>\n\n\n\n<p>CAPTCHA signifie \u00ab\u00a0Test de Turing public enti\u00e8rement automatis\u00e9 pour distinguer les ordinateurs des humains\u00a0\u00bb \u2013 un nom complexe pour un concept simple\u00a0: il s&#039;agit d&#039;un test con\u00e7u pour distinguer les humains des programmes informatiques. On rencontre ces tests partout sur Internet\u00a0: lors du remplissage de formulaires de contact, de la cr\u00e9ation de comptes ou des achats en ligne.<\/p>\n\n\n\n<p>L&#039;objectif principal des CAPTCHA est de prot\u00e9ger contre les programmes automatis\u00e9s, appel\u00e9s robots, qui pourraient tenter de :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Envoyer des messages de spam en masse<\/li>\n\n\n\n<li>Cr\u00e9er des comptes pour abuser des syst\u00e8mes<\/li>\n\n\n\n<li>Craquer les mots de passe par des tentatives r\u00e9p\u00e9t\u00e9es<\/li>\n\n\n\n<li>Achetez des billets ou des produits pour les revendre \u00e0 des prix plus \u00e9lev\u00e9s<\/li>\n\n\n\n<li>Inonder les sections de commentaires de publicit\u00e9s ou de d\u00e9sinformation<\/li>\n<\/ul>\n\n\n\n<p>En utilisant les syst\u00e8mes CAPTCHA, les sites Web peuvent garantir que seuls de vrais humains effectuent certaines actions \u2013 un \u00e9l\u00e9ment essentiel de la s\u00e9curit\u00e9 Internet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-types-of-captcha-s-exist\">Quels types de CAPTCHA existent ?<a href=\"https:\/\/gist.github.com\/hjanuschka\/e0e84701db1b8422705c663d4aac97db#what-types-of-captchas-exist\"><\/a><\/h2>\n\n\n\n<p>Au fil du temps, diff\u00e9rentes m\u00e9thodes CAPTCHA se sont d\u00e9velopp\u00e9es, chacune avec ses propres forces et faiblesses :<\/p>\n\n\n\n<p><strong>CAPTCHA bas\u00e9s sur du texte<\/strong><br>Avec cette m\u00e9thode classique, les utilisateurs doivent reconna\u00eetre et saisir des lettres ou des chiffres d\u00e9form\u00e9s. Longtemps consid\u00e9r\u00e9e comme la norme, les syst\u00e8mes d&#039;IA modernes peuvent d\u00e9sormais souvent contourner ces tests.<\/p>\n\n\n\n<p><strong>CAPTCHA bas\u00e9s sur des images<\/strong><br>Ici, les utilisateurs sont invit\u00e9s \u00e0 identifier des objets sp\u00e9cifiques dans les images, par exemple en cliquant sur tous les feux de circulation, les passages pi\u00e9tons ou les v\u00e9hicules. Cette m\u00e9thode est g\u00e9n\u00e9ralement intuitive pour les humains, mais peut constituer un obstacle pour les personnes malvoyantes.<\/p>\n\n\n\n<p><strong>CAPTCHA audio<\/strong><br>Les CAPTCHA audio ont \u00e9t\u00e9 d\u00e9velopp\u00e9s comme une alternative pour les personnes malvoyantes. Les lettres ou les chiffres sont lus \u00e0 voix haute. Les utilisateurs doivent saisir ce qu&#039;ils entendent. Cependant, ces enregistrements sont souvent volontairement d\u00e9form\u00e9s, ce qui peut rendre la compr\u00e9hension difficile.<\/p>\n\n\n\n<p><strong>Probl\u00e8mes de logique et de math\u00e9matiques<\/strong><br>Les \u00e9nigmes simples ou les t\u00e2ches math\u00e9matiques font \u00e9galement partie du r\u00e9pertoire CAPTCHA. Elles sont faciles \u00e0 r\u00e9soudre pour les humains, mais repr\u00e9sentent un d\u00e9fi pour les programmes automatis\u00e9s.<\/p>\n\n\n\n<p><strong>CAPTCHA bas\u00e9s sur le comportement<\/strong><br>Les syst\u00e8mes modernes analysent le comportement des utilisateurs en arri\u00e8re-plan. Comment se d\u00e9place le curseur de la souris\u00a0? \u00c0 quelle vitesse les formulaires sont-ils remplis\u00a0? En fonction de ces sch\u00e9mas, le logiciel peut d\u00e9terminer s&#039;il s&#039;agit d&#039;un humain ou d&#039;un programme automatis\u00e9.<\/p>\n\n\n\n<p><strong>CAPTCHA invisibles<\/strong><br>La nouvelle g\u00e9n\u00e9ration fonctionne enti\u00e8rement en arri\u00e8re-plan et ne n\u00e9cessite plus d&#039;interaction directe. Diff\u00e9rents facteurs sont d\u00e9sormais analys\u00e9s pour d\u00e9terminer si l&#039;utilisateur est humain, un atout majeur pour la convivialit\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-advantages-and-disadvantages-of-captcha-systems\">Avantages et inconv\u00e9nients des syst\u00e8mes CAPTCHA<\/h2>\n\n\n\n<p>Les CAPTCHA offrent des avantages importants :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ils prot\u00e8gent les sites Web des attaques automatis\u00e9es et du spam<\/li>\n\n\n\n<li>Ils emp\u00eachent l&#039;utilisation abusive des services en ligne<\/li>\n\n\n\n<li>Ils r\u00e9duisent la charge du serveur due au trafic des robots<\/li>\n\n\n\n<li>Ils contribuent \u00e0 maintenir l\u2019int\u00e9grit\u00e9 des votes et des sondages<\/li>\n<\/ul>\n\n\n\n<p>Cependant, il existe \u00e9galement des inconv\u00e9nients importants :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ils peuvent perturber l&#039;exp\u00e9rience utilisateur et entra\u00eener de la frustration<\/li>\n\n\n\n<li>Ils cr\u00e9ent souvent des obstacles pour les personnes handicap\u00e9es<\/li>\n\n\n\n<li>Ils peuvent prendre du temps et r\u00e9duire les taux de conversion des sites Web.<\/li>\n\n\n\n<li>Les robots avanc\u00e9s peuvent d\u00e9sormais contourner de nombreux CAPTCHA traditionnels<\/li>\n\n\n\n<li>Certaines solutions soul\u00e8vent des pr\u00e9occupations consid\u00e9rables en mati\u00e8re de confidentialit\u00e9<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-privacy-aspects-the-difference-between-us-and-european-solutions\">Aspects de la confidentialit\u00e9\u00a0: la diff\u00e9rence entre les solutions am\u00e9ricaines et europ\u00e9ennes<\/h2>\n\n\n\n<p><a href=\"https:\/\/gist.github.com\/hjanuschka\/e0e84701db1b8422705c663d4aac97db#privacy-aspects-the-difference-between-us-and-european-solutions\"><\/a>La confidentialit\u00e9 des donn\u00e9es est un aspect particuli\u00e8rement important lors de l&#039;utilisation des technologies CAPTCHA. C&#039;est sur ce point que les approches am\u00e9ricaine et europ\u00e9enne diff\u00e8rent sensiblement.<\/p>\n\n\n\n<p><strong>Solutions CAPTCHA et pr\u00e9occupations en mati\u00e8re de confidentialit\u00e9 aux \u00c9tats-Unis<\/strong><\/p>\n\n\n\n<p>Le fournisseur de CAPTCHA le plus connu au monde est Google, avec son service reCAPTCHA. Bien que tr\u00e8s efficace, cette solution collecte en arri\u00e8re-plan de nombreuses donn\u00e9es sur le comportement des utilisateurs. Ces donn\u00e9es ne se limitent pas au site web o\u00f9 le CAPTCHA appara\u00eet, mais peuvent s&#039;\u00e9tendre \u00e0 l&#039;ensemble du comportement de navigation de l&#039;utilisateur si celui-ci est connect\u00e9 aux services Google.<\/p>\n\n\n\n<p>Cette collecte de donn\u00e9es comprend potentiellement :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>adresses IP<\/li>\n\n\n\n<li>Informations sur les cookies<\/li>\n\n\n\n<li>Mod\u00e8les de clics et de mouvements<\/li>\n\n\n\n<li>Informations sur le navigateur<\/li>\n\n\n\n<li>Donn\u00e9es de l&#039;appareil<\/li>\n\n\n\n<li>Comportement de navigation sur diff\u00e9rents sites Web<\/li>\n<\/ul>\n\n\n\n<p>Pour les utilisateurs et les entreprises europ\u00e9ens, cela pose probl\u00e8me, car ces pratiques pourraient ne pas \u00eatre enti\u00e8rement compatibles avec le R\u00e8glement g\u00e9n\u00e9ral sur la protection des donn\u00e9es (RGPD). Le RGPD exige un consentement explicite pour le traitement des donn\u00e9es et limite la quantit\u00e9 de donn\u00e9es collect\u00e9es au strict n\u00e9cessaire.<\/p>\n\n\n\n<p><strong>Normes europ\u00e9ennes de protection des donn\u00e9es<\/strong><\/p>\n\n\n\n<p>En Europe, la protection des donn\u00e9es est consid\u00e9r\u00e9e comme un droit fondamental. Le RGPD impose des exigences \u00e9lev\u00e9es aux entreprises\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Minimisation des donn\u00e9es : Seules les donn\u00e9es n\u00e9cessaires \u00e0 la finalit\u00e9 sp\u00e9cifique peuvent \u00eatre collect\u00e9es<\/li>\n\n\n\n<li>Transparence : les utilisateurs doivent \u00eatre clairement inform\u00e9s des donn\u00e9es collect\u00e9es et de la mani\u00e8re dont elles sont utilis\u00e9es<\/li>\n\n\n\n<li>Consentement : Pour le traitement des donn\u00e9es personnelles, un consentement explicite est requis dans de nombreux cas<\/li>\n\n\n\n<li>S\u00e9curit\u00e9 des donn\u00e9es : les informations collect\u00e9es doivent \u00eatre prot\u00e9g\u00e9es de mani\u00e8re ad\u00e9quate<\/li>\n\n\n\n<li>Droits des personnes concern\u00e9es : Les utilisateurs ont le droit d&#039;acc\u00e9der \u00e0 leurs donn\u00e9es, de les supprimer et de les corriger.<\/li>\n<\/ul>\n\n\n\n<p><strong>Alternatives europ\u00e9ennes\u00a0: Captcha.eu, une solution respectueuse de la vie priv\u00e9e<\/strong><\/p>\n\n\n\n<p>Face \u00e0 ces d\u00e9fis, des alternatives europ\u00e9ennes ont \u00e9merg\u00e9, alliant s\u00e9curit\u00e9 et respect des normes de protection des donn\u00e9es. Une solution de r\u00e9f\u00e9rence dans ce domaine est captcha.eu, un service CAPTCHA d\u00e9velopp\u00e9 et h\u00e9berg\u00e9 en Europe.<\/p>\n\n\n\n<p>Captcha.eu diff\u00e8re des alternatives am\u00e9ricaines de mani\u00e8res importantes :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stockage de donn\u00e9es europ\u00e9en<\/strong>:Toutes les donn\u00e9es sont trait\u00e9es et stock\u00e9es exclusivement sur des serveurs europ\u00e9ens, ce qui simplifie consid\u00e9rablement la conformit\u00e9 au RGPD.<\/li>\n\n\n\n<li><strong>Minimisation des donn\u00e9es<\/strong>:Captcha.eu fonctionne sur le principe de minimisation des donn\u00e9es et ne collecte que les informations r\u00e9ellement n\u00e9cessaires pour distinguer les humains des machines.<\/li>\n\n\n\n<li><strong>Aucune collecte de donn\u00e9es pour la cr\u00e9ation de profils<\/strong>:Contrairement \u00e0 certaines solutions am\u00e9ricaines, captcha.eu ne cr\u00e9e pas de profils d&#039;utilisateurs complets et ne suit pas le comportement sur diff\u00e9rents sites Web.<\/li>\n\n\n\n<li><strong>Accessibilit\u00e9<\/strong>Captcha.eu accorde une importance particuli\u00e8re \u00e0 l&#039;accessibilit\u00e9. Le service est certifi\u00e9 accessible par T\u00dcV Autriche et b\u00e9n\u00e9ficie de la certification WACA Argent, ce qui le rend accessible aux personnes en situation de handicap.<\/li>\n\n\n\n<li><strong>Int\u00e9gration facile<\/strong>:La solution peut \u00eatre facilement int\u00e9gr\u00e9e dans des syst\u00e8mes de gestion de contenu courants tels que WordPress, TYPO3, NeosCMS, Joomla et Magento, mais \u00e9galement dans des projets Web individuels via des API standardis\u00e9es.<\/li>\n<\/ul>\n\n\n\n<p>Cette combinaison de s\u00e9curit\u00e9, de protection des donn\u00e9es et d&#039;accessibilit\u00e9 fait de captcha.eu une alternative int\u00e9ressante pour les entreprises europ\u00e9ennes qui souhaitent \u00e0 la fois prot\u00e9ger leurs sites Web et respecter la vie priv\u00e9e de leurs utilisateurs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion-making-the-right-captcha-choice\">Conclusion\u00a0: faire le bon choix de CAPTCHA<\/h2>\n\n\n\n<p>Lors de la s\u00e9lection d&#039;un syst\u00e8me CAPTCHA, les op\u00e9rateurs de sites Web doivent prendre en compte plusieurs facteurs :<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Niveau de s\u00e9curit\u00e9<\/strong>:Dans quelle mesure la solution prot\u00e8ge-t-elle contre les attaques de robots actuelles\u00a0?<\/li>\n\n\n\n<li><strong>Convivialit\u00e9<\/strong>:L&#039;exp\u00e9rience utilisateur est-elle affect\u00e9e le moins possible ?<\/li>\n\n\n\n<li><strong>Accessibilit\u00e9<\/strong>:Tous les utilisateurs, quelles que soient les limitations potentielles, peuvent-ils utiliser le site Web\u00a0?<\/li>\n\n\n\n<li><strong>Protection des donn\u00e9es<\/strong>:Les donn\u00e9es personnelles sont-elles trait\u00e9es conform\u00e9ment au RGPD ?<\/li>\n\n\n\n<li><strong>Transparence<\/strong>:Est-il clair quelles donn\u00e9es sont collect\u00e9es et comment elles sont utilis\u00e9es ?<\/li>\n<\/ol>\n\n\n\n<p>Pour les entreprises europ\u00e9ennes, une solution conforme au RGPD comme captcha.eu offre l&#039;avantage de la s\u00e9curit\u00e9 juridique tout en renfor\u00e7ant la confiance des utilisateurs. \u00c0 l&#039;\u00e8re de la sensibilisation croissante \u00e0 la protection des donn\u00e9es, cela peut constituer un avantage concurrentiel important.<\/p>\n\n\n\n<p>La d\u00e9cision d\u2019utiliser un syst\u00e8me CAPTCHA doit en fin de compte \u00eatre bas\u00e9e non seulement sur des aspects techniques, mais \u00e9galement sur les valeurs de votre entreprise, en particulier votre attitude envers la protection de la vie priv\u00e9e et la garantie que les offres num\u00e9riques sont accessibles \u00e0 tous les groupes d\u2019utilisateurs.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Dans le monde num\u00e9rique, nous rencontrons r\u00e9guli\u00e8rement de petits contr\u00f4les de s\u00e9curit\u00e9 qui nous demandent de s\u00e9lectionner des images, de d\u00e9chiffrer des lettres d\u00e9form\u00e9es ou de simplement cliquer sur une case \u00e0 cocher. Ces obstacles ont une fonction importante : ils prot\u00e8gent les sites web contre les attaques automatis\u00e9es. Mais comment ces m\u00e9canismes de protection fonctionnent-ils exactement et que faut-il prendre en compte en mati\u00e8re de confidentialit\u00e9 des donn\u00e9es ? Qu'est-ce qu'un CAPTCHA et...<\/p>","protected":false},"author":1,"featured_media":1895,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[19,36],"tags":[],"class_list":["post-1894","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-new-blog","category-news"],"acf":{"pretitle":"","intern_slug":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.3 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is CAPTCHA? \u00bb How It Works &amp; Why Privacy Matters<\/title>\n<meta name=\"description\" content=\"What is CAPTCHA? \u279c Understand types \u2713 Weigh pros &amp; cons \u2713 Compare US vs. EU privacy \u2713 Learn how to choose the right CAPTCHA solution!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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alt='Captcha' src='https:\/\/secure.gravatar.com\/avatar\/48b669a092d552f5f30202f8da848c93fa4c54f8c2b3167568ed5cbccbe4994a?s=128&#038;d=mm&#038;r=g' srcset='https:\/\/secure.gravatar.com\/avatar\/48b669a092d552f5f30202f8da848c93fa4c54f8c2b3167568ed5cbccbe4994a?s=256&#038;d=mm&#038;r=g 2x' class='avatar avatar-128 photo' height='128' width='128' decoding='async'\/>"},"pbg_comment_info":" No Comments","pbg_excerpt":"In the digital world, we regularly encounter small security checks asking us to select images, decipher distorted letters, or simply click a checkbox. These hurdles serve an important purpose: they protect websites from automated attacks. But how exactly do these protection mechanisms work, and what should we consider regarding data privacy? What is CAPTCHA and...","_links":{"self":[{"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/posts\/1894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/comments?post=1894"}],"version-history":[{"count":3,"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/posts\/1894\/revisions"}],"predecessor-version":[{"id":2200,"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/posts\/1894\/revisions\/2200"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/media\/1895"}],"wp:attachment":[{"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/media?parent=1894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/categories?post=1894"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/new.captcha.eu\/fr\/wp-json\/wp\/v2\/tags?post=1894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}