{"id":2368,"date":"2026-06-02T15:49:56","date_gmt":"2026-06-02T13:49:56","guid":{"rendered":"https:\/\/cyberforgood.org\/fr\/?post_type=module&p=2368"},"modified":"2026-06-02T15:49:57","modified_gmt":"2026-06-02T13:49:57","slug":"les-extensions-le-cloud-quand-la-commodite-met-en-danger-vos-donnees","status":"publish","type":"module","link":"https:\/\/cyberforgood.org\/fr\/module\/les-extensions-le-cloud-quand-la-commodite-met-en-danger-vos-donnees\/","title":{"rendered":"Les extensions & le cloud : quand la commodit\u00e9 met en danger vos donn\u00e9es"},"content":{"rendered":"\n

Les extensions peuvent am\u00e9liorer le confort de navigation mais repr\u00e9sentent un risque majeur.<\/p>\n\n\n\n

Les extensions de navigateur sont souvent per\u00e7ues comme de simples outils de confort. Pourtant, elles disposent fr\u00e9quemment de droits tr\u00e8s \u00e9tendus, leur permettant de lire le contenu des pages consult\u00e9es, d\u2019acc\u00e9der aux formulaires ou de modifier les informations affich\u00e9es.<\/p>\n\n\n\n

Une extension malveillante ou compromise peut annuler tous les efforts de s\u00e9curit\u00e9 mis en place par ailleurs. Elle peut collecter des donn\u00e9es sensibles, injecter du contenu ou transmettre des informations \u00e0 des tiers. Certaines extensions collectent l\u2019historique de navigation, injectent de la publicit\u00e9 ou acc\u00e8dent aux mots de passe.<\/p>\n\n\n\n

Il est donc imp\u00e9ratif de limiter strictement le nombre d\u2019extensions install\u00e9es et de n\u2019utiliser que des extensions reconnues, r\u00e9guli\u00e8rement mises \u00e0 jour et issues de sources fiables. Chaque extension doit \u00eatre consid\u00e9r\u00e9e comme un risque potentiel qu\u2019il convient d\u2019\u00e9valuer.<\/p>\n\n\n\n

\u2705\ufe0fLes 20 bonnes pratiques ! <\/h2>\n\n\n\n
    \n
  1. Chiffrer syst\u00e9matiquement les donn\u00e9es avant leur envoi dans le cloud<\/li>\n\n\n\n
  2. Consid\u00e9rer tout cloud non chiffr\u00e9 c\u00f4t\u00e9 client comme un espace non confidentiel<\/li>\n\n\n\n
  3. Utiliser des outils de chiffrement ind\u00e9pendants du fournisseur cloud<\/li>\n\n\n\n
  4. Choisir des mots de passe longs, uniques et non r\u00e9utilis\u00e9s pour le chiffrement<\/li>\n\n\n\n
  5. Sauvegarder les cl\u00e9s de chiffrement de mani\u00e8re s\u00e9curis\u00e9e et hors ligne<\/li>\n\n\n\n
  6. Ne jamais transmettre les cl\u00e9s de chiffrement par des canaux non s\u00e9curis\u00e9s<\/li>\n\n\n\n
  7. Limiter le nombre de services cloud utilis\u00e9s pour r\u00e9duire la surface de risque<\/li>\n\n\n\n
  8. D\u00e9sactiver les partages publics par d\u00e9faut<\/li>\n\n\n\n
  9. V\u00e9rifier r\u00e9guli\u00e8rement les param\u00e8tres de partage et d\u2019acc\u00e8s<\/li>\n\n\n\n
  10. \u00c9viter la synchronisation automatique de dossiers contenant des donn\u00e9es tr\u00e8s sensibles sans compr\u00e9hension des risques<\/li>\n\n\n\n
  11. Chiffrer \u00e9galement les sauvegardes stock\u00e9es dans le cloud<\/li>\n\n\n\n
  12. Prot\u00e9ger les comptes cloud par une authentification multi facteur<\/li>\n\n\n\n
  13. Mettre \u00e0 jour r\u00e9guli\u00e8rement les outils de chiffrement utilis\u00e9s<\/li>\n\n\n\n
  14. Comprendre que le fournisseur cloud ne peut pas aider \u00e0 r\u00e9cup\u00e9rer des donn\u00e9es chiffr\u00e9es perdues<\/li>\n\n\n\n
  15. Tester p\u00e9riodiquement l\u2019acc\u00e8s aux donn\u00e9es chiffr\u00e9es depuis un autre appareil<\/li>\n\n\n\n
  16. Ne jamais stocker les cl\u00e9s de chiffrement dans le m\u00eame cloud que les donn\u00e9es<\/li>\n\n\n\n
  17. S\u00e9parer les usages personnels et professionnels du cloud<\/li>\n\n\n\n
  18. Adapter l\u2019usage du cloud au niveau de sensibilit\u00e9 de l\u2019enqu\u00eate<\/li>\n\n\n\n
  19. Compl\u00e9ter le chiffrement c\u00f4t\u00e9 client par un chiffrement du disque local<\/li>\n\n\n\n
  20. Former les utilisateurs aux limites du chiffrement c\u00f4t\u00e9 client<\/li>\n<\/ol>\n\n\n\n

    \ud83d\udd1c Solutions recommand\u00e9es <\/h2>\n\n\n\n
    \"\"<\/figure>\n\n\n\n

    Le chiffrement impose une discipline accrue. Certaines fonctionnalit\u00e9s courantes du cloud, comme la recherche dans le contenu des fichiers ou l\u2019\u00e9dition collaborative en temps r\u00e9el, peuvent \u00eatre limit\u00e9es ou impossibles.<\/p>\n\n\n\n

    Il est \u00e9galement crucial de comprendre que le chiffrement c\u00f4t\u00e9 client ne prot\u00e8ge pas contre une compromission de l\u2019appareil lui-m\u00eame. Si un ordinateur ou un smartphone est infect\u00e9 par un logiciel espion ou utilis\u00e9 sans pr\u00e9caution, les donn\u00e9es peuvent \u00eatre accessibles lorsqu\u2019elles sont d\u00e9chiffr\u00e9es \u00e0 l\u2019\u00e9cran.<\/p>\n\n\n\n

    Enfin, la multiplication des copies synchronis\u00e9es augmente le besoin de rigueur dans la gestion des appareils autoris\u00e9s et des acc\u00e8s.<\/p>\n\n\n\n

    Cas pratique<\/h2>\n\n\n\n

    Un journaliste partage un dossier via un service cloud pour travailler \u00e0 distance.<\/p>\n\n\n\n

    Si les fichiers sont stock\u00e9s en clair, une erreur de partage peut exposer les donn\u00e9es. S\u2019ils sont chiffr\u00e9s, l\u2019erreur n\u2019entra\u00eene pas de fuite exploitable.<\/p>\n\n\n\n

    Les solutions les plus fiables sont celles qui reposent sur un chiffrement c\u00f4t\u00e9 client, o\u00f9 le fournisseur cloud n\u2019a jamais acc\u00e8s aux donn\u00e9es en clair.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Les extensions peuvent am\u00e9liorer le confort de navigation mais repr\u00e9sentent un risque majeur. Les extensions de navigateur sont souvent per\u00e7ues comme de simples outils de confort. Pourtant, elles disposent fr\u00e9quemment…<\/p>\n","protected":false},"featured_media":0,"menu_order":0,"template":"","index":[19,39],"field":[6],"class_list":["post-2368","module","type-module","status-publish","hentry","index-media","index-module-5-media","field-media"],"acf":[],"yoast_head":"\nLes extensions & le cloud : quand la commodit\u00e9 met en danger vos donn\u00e9es - Cyber 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:\/\/cyberforgood.org\/fr\/module\/les-extensions-le-cloud-quand-la-commodite-met-en-danger-vos-donnees\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les extensions & le cloud : quand la commodit\u00e9 met en danger vos donn\u00e9es - Cyber for Good\" \/>\n<meta property=\"og:description\" content=\"Les extensions peuvent am\u00e9liorer le confort de navigation mais repr\u00e9sentent un risque majeur. 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