{"id":27036,"date":"2022-07-21T15:41:00","date_gmt":"2022-07-21T13:41:00","guid":{"rendered":"https:\/\/perseus.de\/deep-fakes-realite-vs-manipulation\/"},"modified":"2026-03-30T14:47:16","modified_gmt":"2026-03-30T12:47:16","slug":"deep-fakes-realite-vs-manipulation","status":"publish","type":"post","link":"https:\/\/perseus.de\/fr\/deep-fakes-realite-vs-manipulation\/","title":{"rendered":"Deep Fakes \u2013 R\u00e9alit\u00e9 vs Manipulation"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"27036\" class=\"elementor elementor-27036 elementor-3357\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ba0588 e-flex e-con-boxed e-con e-parent\" data-id=\"2ba0588\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6459d3d elementor-widget elementor-widget-image\" data-id=\"6459d3d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"432\" src=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Giffey-Klitschko-768x432-1.webp\" class=\"attachment-medium_large size-medium_large wp-image-27035\" alt=\"\" srcset=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Giffey-Klitschko-768x432-1.webp 768w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Giffey-Klitschko-768x432-1-300x169.webp 300w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Cr\u00e9dit image : S\u00fcddeutsche Zeitung \/ dpa<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5e2bc6fb e-flex e-con-boxed e-con e-parent\" data-id=\"5e2bc6fb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-65a1966 e-con-full e-flex e-con e-child\" data-id=\"65a1966\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-293f8f9 e-con-full e-flex e-con e-child\" data-id=\"293f8f9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-570f983 elementor-widget elementor-widget-text-editor\" data-id=\"570f983\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h6>21.07.2022<\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8aa736 elementor-widget elementor-widget-heading\" data-id=\"c8aa736\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Deep Fakes \u2013 R\u00e9alit\u00e9 vs Manipulation\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8965382 elementor-widget elementor-widget-text-editor\" data-id=\"8965382\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Actualit\u00e9s| Cybercriminalit\u00e9 | Vecteurs d\u2019attaque<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-00c22a8 e-con-full e-flex e-con e-child\" data-id=\"00c22a8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5791d1b elementor-widget elementor-widget-text-editor\" data-id=\"5791d1b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Cette nouvelle a fait sensation. Le maire de Kiev, Vitali Klitschko, appelle la maire de Berlin Franziska Giffey. C\u2019est ce que \u00e7a avait l\u2019air au premier abord. En r\u00e9alit\u00e9, cependant, l\u2019appel vid\u00e9o \u00e9tait faux. Au d\u00e9but, il n\u2019\u00e9tait pas tout \u00e0 fait clair s\u2019il s\u2019agissait d\u2019un soi-disant deep fake ou d\u2019un montage tr\u00e8s professionnel de diff\u00e9rents enregistrements. Entre-temps, cependant, on sait qu\u2019un duo d\u2019humoristes russes est responsable de l\u2019incident.     <\/strong><\/p><p> <\/p><p>M\u00eame si cet incident est peu susceptible d\u2019\u00eatre un deep fake, cette technologie pr\u00e9sente un certain risque. Dans l\u2019article suivant, nous expliquons ce que sont r\u00e9ellement les deep fakes, comment ils se produisent, quand ils deviennent dangereux et comment les reconna\u00eetre. Bonne lecture.  <\/p><p><strong> <\/strong><\/p><h4><strong>Que s\u2019est-il exactement pass\u00e9 ?<\/strong><\/h4><p>Fin juin, le maire de Berlin a re\u00e7u un appel vid\u00e9o du maire de Kiev, Vitali Klitschko. Il n\u2019\u00e9tait pas \u00e9vident au premier abord que l\u2019appel \u00e9tait faux. Selon Franziska Giffey, les expressions faciales et les gestes correspondaient. Les mouvements de la bouche \u00e9taient \u00e9galement corrects. Elle n\u2019avait des doutes qu\u2019\u00e0 cause du cours de la conversation. Lorsque le sujet de la tenue d\u2019une journ\u00e9e de la rue Christopher \u00e0 Kiev a \u00e9t\u00e9 abord\u00e9, Franziska Giffey a soup\u00e7onn\u00e9 que quelque chose n\u2019allait pas et a mis fin \u00e0 la conversation. Le m\u00eame match a \u00e9t\u00e9 r\u00e9p\u00e9t\u00e9 \u00e0 Budapest, Madrid, Vienne et peut-\u00eatre dans d\u2019autres villes europ\u00e9ennes.      <\/p><p><strong> <\/strong><\/p><h4><strong>Comment en est-on arriv\u00e9 l\u00e0 ?<\/strong><\/h4><p>On sait d\u00e9sormais qu\u2019un duo d\u2019humoristes russes est responsable des faux appels vid\u00e9o. Ils ont utilis\u00e9 des m\u00e9thodes d\u2019ing\u00e9nierie sociale pour acc\u00e9der \u00e0 la mairie et pouvoir passer l\u2019appel vid\u00e9o. L\u2019ing\u00e9nierie sociale consiste \u00e0 collecter des informations sur les personnes et, en fin de compte, \u00e0 les utiliser de mani\u00e8re si habile qu\u2019une relation de confiance se cr\u00e9e et que des informations sensibles sont transmises. Selon les deux auteurs, cette proc\u00e9dure est \u00ab tr\u00e8s simple \u00bb et \u00ab fonctionne \u00e0 chaque fois \u00bb.   <\/p><p>Ils ne fournissent aucune information sur la mani\u00e8re dont la vid\u00e9o a r\u00e9ellement \u00e9t\u00e9 r\u00e9alis\u00e9e. La seule information qu\u2019ils ont partag\u00e9e sur leur attaque est qu\u2019il ne s\u2019agit pas d\u2019un deep fake. <\/p><p><strong> <\/strong><\/p><h4><strong>Mais qu\u2019est-ce qu\u2019un deep fake ?<\/strong><\/h4><p>Le terme \u00ab deep fake \u00bb vient de l\u2019anglais et est compos\u00e9 des mots deep learning et fake. Ce sont des faux cr\u00e9\u00e9s \u00e0 l\u2019aide d\u2019une intelligence artificielle \u00e0 partir d\u2019images, d\u2019enregistrements audio et films. Il existe plusieurs formes de deep fakes, dont certaines peuvent se produire en temps r\u00e9el :  <\/p><ul><li>L\u2019\u00e9change de visages \u00ab \u00e9change de visages les uns contre les autres \u00bb \u2192 Les visages sont \u00e9chang\u00e9s les uns contre les autres, de sorte que les personnes sont repr\u00e9sent\u00e9es dans des situations et des contextes compl\u00e8tement diff\u00e9rents.<\/li><li>\u00c9change de voix \u00ab Permet aux gens de parler diff\u00e9rents textes \u00bb \u2192 contenu audio est ajust\u00e9 pour donner l\u2019impression que la personne repr\u00e9sent\u00e9e parle un texte diff\u00e9rent.<\/li><li>Marionnettes corporelles : \u00ab Mouvements modifi\u00e9s des personnes \u00bb \u2192 Des s\u00e9quences compl\u00e8tes de mouvements sont transf\u00e9r\u00e9es \u00e0 d\u2019autres personnes.<\/li><\/ul><p><strong> <\/strong><\/p><h4><strong>Comment cr\u00e9er des deepfakes<\/strong><\/h4><p>Il n\u2019a jamais \u00e9t\u00e9 aussi facile de cr\u00e9er des deepfakes qu\u2019aujourd\u2019hui : d\u2019innombrables applications et programmes comme Reface ou DeepFaceLab permettent de cr\u00e9er des deepfakes en seulement quelques \u00e9tapes. FakeApp est m\u00eame disponible gratuitement pour ses utilisateurs, et le programme Avatarify permet \u00e0 ses utilisateurs de se transformer en une personne (avatar) compl\u00e8tement diff\u00e9rente et ainsi d\u2019appara\u00eetre en temps r\u00e9el lors de conversations vid\u00e9o via Skype, Zoom et Teams. <\/p><p>Comme mentionn\u00e9 pr\u00e9c\u00e9demment, l\u2019intelligence artificielle est utilis\u00e9e pour cr\u00e9er des deepfakes. Les r\u00e9seaux neuronaux et les algorithmes analysent le mat\u00e9riel audio, image et vid\u00e9o existant de la personne \u00e0 imiter et cr\u00e9ent de nouveaux contenus. Plus il y a de mat\u00e9riel original sur une personne, plus le r\u00e9sultat semble r\u00e9aliste. Si les applications aliment\u00e9es par l\u2019IA disposent de mat\u00e9riel provenant d\u2019une personne issue de diff\u00e9rentes situations, perspectives et formats m\u00e9dias, elles apprennent rapidement les propri\u00e9t\u00e9s essentielles. L\u2019IA peut alors transf\u00e9rer ces propri\u00e9t\u00e9s \u00e0 d\u2019autres mat\u00e9riaux sans modifier l\u2019environnement.    <\/p><p> <\/p><p><img decoding=\"async\" class=\"alignnone wp-image-3359 size-full\" src=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Group-5.png\" alt=\"\" width=\"552\" height=\"173\" srcset=\"https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Group-5.png 552w, https:\/\/perseus.de\/wp-content\/uploads\/2025\/04\/Group-5-300x94.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/p><p> <\/p><p><strong> <\/strong><\/p><h4><strong>\u00c0 quoi servent les deepfakes ?<\/strong><\/h4><p>L\u2019exemple des faux appels de maire pr\u00e9sent\u00e9 illustre tr\u00e8s bien les domaines possibles d\u2019application. M\u00eame si ce n\u2019est pas un deep fake \u2013 selon les auteurs \u2013 la motivation est clairement visible. Les humoristes appellent cela \u00ab divertissement \u00bb et \u00ab divertissement \u00bb. Les victimes, en revanche, parlent de \u00ab <a href=\"https:\/\/www.zeit.de\/news\/2022-06\/25\/giffey-nach-fake-anruf-kuenftig-misstrauischer-sein?utm_referrer=https%3A%2F%2Fwww.google.com%2F\">guerre moderne<\/a> \u00bb. Cela d\u00e9crit tr\u00e8s bien la situation. Les deep fakes sont souvent utilis\u00e9s \u00e0 des fins de divertissement, car il peut \u00eatre amusant de placer des personnalit\u00e9s connues dans des situations obscures et embarrassantes.     <\/p><p>Cependant, cette technique peut aussi rapidement tourner \u00e0 l\u2019inverse et conduire \u00e0 la discr\u00e9ditation des personnes ou \u00e0 la diffusion de d\u00e9sinformation et de propagande.<\/p><p><strong> <\/strong><\/p><h4><strong>Pourquoi sont-ils si dangereux ?<\/strong><\/h4><p>Le <a href=\"https:\/\/www.bundesregierung.de\/breg-de\/themen\/umgang-mit-desinformation\/deep-fakes-1876736\">gouvernement allemand<\/a> avertit \u00e9galement que les deep fakes peuvent repr\u00e9senter un grand danger pour la soci\u00e9t\u00e9 et la politique. Surtout lorsqu\u2019elle est utilis\u00e9e pour influencer les processus politiques et l\u2019opinion publique. <\/p><p>Gr\u00e2ce aux avanc\u00e9es techniques, il est possible qu\u2019il ne soit plus difficile de cr\u00e9er des deepfakes, m\u00eame pour les profanes comme pour les d\u00e9butants. De plus, la puissance de calcul et les performances de l\u2019intelligence artificielle augmentent constamment. En cons\u00e9quence, la qualit\u00e9 des deep fakes s\u2019am\u00e9liore rapidement. Il devient de plus en plus difficile de distinguer la v\u00e9rit\u00e9 de la manipulation.   <\/p><p><strong> <\/strong><\/p><h4><strong>Comment rep\u00e9rer les deepfake<\/strong><\/h4><p>Les deep fakes ne vous accompagneront certainement pas dans la vie de tous les jours. L\u2019utilisation des deepfakes est en effet tr\u00e8s sp\u00e9cifique et d\u00e9pend de la situation. Mais surtout lorsque des aspects politiques, socio-critiques ou explosifs sont abord\u00e9s et que des vid\u00e9os sont utilis\u00e9es pour le reportage, il peut \u00eatre utile d\u2019y jeter un \u0153il plus attentif. Comme dans de nombreux autres cas, vous devez d\u2019abord \u00e9couter votre intuition. Si vous voyez une vid\u00e9o d\u2019une personne ou \u00e9coutez un enregistrement audio d\u2019elle et que le comportement ou ce qui est dit vous semble \u00e9trange ou compl\u00e8tement contraire \u00e0 l\u2019apparence et au comportement \u00ab normaux \u00bb de la personne, cela peut \u00eatre de la manipulation.    <\/p><p><span style=\"font-size: 1rem;\">Comme mentionn\u00e9, il peut \u00eatre assez difficile de d\u00e9tecter les deepfakes ou les falsifications et manipulations en g\u00e9n\u00e9ral \u00e0 cause des progr\u00e8s techniques. Cependant, les aspects suivants doivent \u00eatre not\u00e9s : <\/span><\/p><p><span style=\"font-size: 1rem;\"> <\/span><\/p><ul><li>Qualit\u00e9 : Voyez-vous une diff\u00e9rence de qualit\u00e9 ? Certaines parties de l\u2019image sont-elles nettement pires ou meilleures que le reste du mat\u00e9riel ? Par exemple, le visage est-il repr\u00e9sent\u00e9 beaucoup plus nettement que le reste du corps ? Si c\u2019est le cas, il se peut que le plan ou l\u2019image soit compos\u00e9 d\u2019\u00e9l\u00e9ments diff\u00e9rents.   <\/li><li>Constance : Les visages des gens sont uniques et pr\u00e9sentent certaines caract\u00e9ristiques. De plus, l\u2019apparence varie d\u2019un jour \u00e0 l\u2019autre. Assurez-vous donc que les plans sont coh\u00e9rents et que la personne est toujours repr\u00e9sent\u00e9e de la m\u00eame mani\u00e8re. Si des traits clairement reconnaissables disparaissent soudainement, il pourrait y avoir une manipulation.   <\/li><li>Changement de perspective : Les plans artificiels fonctionnent souvent tr\u00e8s bien lorsque la personne est montr\u00e9e de face. Cela peut devenir plus critique si la personne incline la t\u00eate ou change d\u2019angle. Si l\u2019image para\u00eet moins nette et moins nette, on peut aussi supposer qu\u2019il s\u2019agit d\u2019une manipulation.  <\/li><\/ul><p><strong> <\/strong><\/p><p><strong>Vous pouvez lire plus d\u2019informations sur les deep fakes ici :  <\/strong><\/p><ul><li><a href=\"https:\/\/www.bundesregierung.de\/breg-de\/themen\/umgang-mit-desinformation\/deep-fakes-1876736\">Gouvernement f\u00e9d\u00e9ral \u00ab Deep Fakes \u00bb<\/a><\/li><li><a href=\"https:\/\/www.bsi.bund.de\/DE\/Themen\/Unternehmen-und-Organisationen\/Informationen-und-Empfehlungen\/Kuenstliche-Intelligenz\/Deepfakes\/deepfakes_node.html\">BSI \u00ab Deep Fakes et contre-mesures \u00bb<\/a><\/li><\/ul><p> <\/p><p>Avez-vous d\u00e9j\u00e0 \u00e9t\u00e9 en contact avec des deepfakes et souhaitez-vous partager vos exp\u00e9riences avec nous ? N\u2019h\u00e9sitez pas \u00e0 nous contacter. Nous attendons cet \u00e9change avec impatience.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4d84bbc e-flex e-con-boxed e-con e-parent\" data-id=\"4d84bbc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-05a335d elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"05a335d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Les attaques par ransomware sont omnipr\u00e9sentes. Que ce soit par la couverture m\u00e9diatique, des histoires issues du travail ou des connaissances \u2013 il est impossible d\u2019\u00e9viter le sujet de la cybercriminalit\u00e9 et surtout des ransomwares. Cependant, cette pr\u00e9sence croissante a une origine fond\u00e9e sur des faits.  <\/p>\n","protected":false},"author":3,"featured_media":27035,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[],"class_list":["post-27036","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Deep Fakes \u2013 R\u00e9alit\u00e9 vs Manipulation - Perseus Technologies<\/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:\/\/perseus.de\/fr\/deep-fakes-realite-vs-manipulation\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Deep Fakes \u2013 R\u00e9alit\u00e9 vs Manipulation - Perseus Technologies\" \/>\n<meta property=\"og:description\" content=\"Les attaques par ransomware sont omnipr\u00e9sentes. Que ce soit par la couverture m\u00e9diatique, des histoires issues du travail ou des connaissances \u2013 il est impossible d\u2019\u00e9viter le sujet de la cybercriminalit\u00e9 et surtout des ransomwares. 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