{"id":1407,"date":"2016-10-25T09:43:07","date_gmt":"2016-10-25T07:43:07","guid":{"rendered":"https:\/\/test-blog.mailfence.com\/?p=1407"},"modified":"2024-06-04T16:26:58","modified_gmt":"2024-06-04T14:26:58","slug":"e-mail-securise-le-chiffrement-de-bout-en-bout-en-est-le-coeur","status":"publish","type":"post","link":"https:\/\/blog.mailfence.com\/fr\/e-mail-securise-le-chiffrement-de-bout-en-bout-en-est-le-coeur\/","title":{"rendered":"E-mail s\u00e9curis\u00e9 : le chiffrement de bout en bout en est le c\u0153ur"},"content":{"rendered":"\n
\"le<\/a><\/figure>\n\n\n\n\n\n\n

Tout le monde souhaite mettre la main sur vos donn\u00e9es d\u2019une fa\u00e7on ou d\u2019une autre. Il ne s\u2019agit pas seulement de la NSA, de Google, de Facebook<\/a> ou de votre fournisseur t\u00e9l\u00e9com. M\u00eame l\u2019application lampe-torche de votre smartphone et le site d\u2019e-commerce que vous consultez tentent d\u2019acc\u00e9der \u00e0 vos informations priv\u00e9es. Mais nous devons malgr\u00e9 tout communiquer avec notre famille, nos proches, nos coll\u00e8gues ou encore des organismes gouvernementaux. Et c\u2019est pr\u00e9cis\u00e9ment l\u00e0 que le chiffrement de bout en bout<\/a> entre en jeu (jetez un coup d\u2019\u0153il \u00e0 l\u2019image ci-dessus) en permettant le brouillage de vos donn\u00e9es avant m\u00eame qu\u2019elles ne quittent votre appareil, celles-ci ne pouvant \u00eatre lues que par le bon destinataire.<\/p>\n\n\n\n

Dans la section suivante, nous aborderons les diff\u00e9rents aspects du respect de la vie priv\u00e9e et de la s\u00e9curit\u00e9 au sein des e-mails. Vous apprendrez pourquoi le chiffrement de bout en bout constitue le c\u0153ur des courriers \u00e9lectroniques s\u00e9curis\u00e9s.<\/p>\n\n\n\n

Email et communications num\u00e9riques <\/strong><\/h2>\n\n\n\n

Nous envoyons continuellement des  e-mails \u00e0 nos parents, nos amis ou nos coll\u00e8gues. Sur une journ\u00e9e, 215,3 milliards d\u2019e-mails sont envoy\u00e9s. Ce nombre devrait augmenter de 17% en 2019. Inutile de pr\u00e9ciser que le courrier \u00e9lectronique est devenu le centre n\u00e9vralgique (\u00e9pine dorsale) de la communication num\u00e9rique, raison pour laquelle l\u2019e-mail se r\u00e9v\u00e8le aujourd\u2019hui tr\u00e8s attrayant sur le plan de la surveillance ou de l\u2019espionnage de masse.<\/p>\n\n\n\n

Gratuit ne veut pas dire \u00ab libre \u00bb <\/strong><\/h2>\n\n\n\n

Tous les fournisseurs de messagerie conventionnels affirment que leurs services sont gratuits. Il n\u2019en est rien. Lors de l\u2019utilisation de ces services, le prix \u00e0 payer est l\u2019abandon de ses propres donn\u00e9es. C\u2019est en effet tr\u00e8s grave !<\/strong><\/p>\n\n\n\n

Avez-vous d\u00e9j\u00e0 song\u00e9 au nombre d\u2019informations d\u00e9tenues par Google \u00e0 votre sujet<\/a> ?<\/p>\n\n\n\n

Maintenir la confidentialit\u00e9 et la s\u00e9curit\u00e9 de votre e-mail n\u2019est pas quelque chose de simple <\/strong><\/p>\n\n\n\n

Ci-dessous quelques-unes des raisons:<\/p>\n\n\n\n

Convivialit\u00e9 versus confidentialit\u00e9 et s\u00e9curit\u00e9 des donn\u00e9es<\/h2>\n\n\n\n

Plusieurs services mettent l\u2019accent sur la facilit\u00e9 d\u2019emploi (ce qui n\u2019est pas une mauvaise chose en soi). Mais cette facilit\u00e9 a comme aboutit \u00e0 des changements de pratiques des utilisateurs et au vol des donn\u00e9es. Les utilisateurs deviennent n\u00e9gligents en ce qui concerne la confidentialit\u00e9 de leurs donn\u00e9es.<\/p>\n\n\n\n

Tentatives pour interdire le chiffrement<\/h2>\n\n\n\n

Les tentatives perp\u00e9tuelles visant \u00e0 interdire le chiffrement aux Etats-Unis et en Europe et les efforts d\u00e9ploy\u00e9s par la NSA en ce qui concerne la surveillance massive, ont montr\u00e9 \u00e0 quel point le chiffrement peut \u00eatre sabot\u00e9. Le raisonnement derri\u00e8re les mesures visant \u00e0 interdire le chiffrement est que ce dernier est susceptible d\u2019\u00eatre employ\u00e9 par les cybercriminels et les terroristes. Cependant, une telle mesure a aussi peu de poids que celle qui viserait \u00e0 bannir les t\u00e9l\u00e9phones parce que les criminels les utilisent pour commettre leurs d\u00e9lits.<\/p>\n\n\n\n

Une fausse impression de s\u00e9curit\u00e9<\/h2>\n\n\n\n

Il s\u2019agit d\u2019un aspect n\u00e9glig\u00e9. Pourquoi n\u2019existe-t-il pas une utilisation massive des solutions de messagerie s\u00e9curis\u00e9e ? La cause r\u00e9side probablement dans le manque de sensibilisation et de connaissances parmi les utilisateurs finaux. La plupart des personnes ne savent pas ce que signifient v\u00e9ritablement la s\u00e9curit\u00e9 et la confidentialit\u00e9 en ligne. D\u2019une certaine fa\u00e7on, cela semble assez logique car notre t\u00e2che est d\u2019offrir aux utilisateurs des solutions de messagerie s\u00e9curis\u00e9e faciles d\u2019emploi. Nous ne pourrions pas demander aux utilisateurs qu\u2019ils se plongent dans les aspects techniques. Toutefois, beaucoup d\u2019organisations sur Internet abusent de leur confiance en pla\u00e7ant des portes d\u00e9rob\u00e9es au sein de leurs applications, en fouinant dans leurs donn\u00e9es ou en vendant celles-ci. Dans certains cas, ces organisations fournissent m\u00eame un acc\u00e8s secret aux agences d\u2019espionnage sans disposer d\u2019aucune ordonnance juridique.<\/p>\n\n\n\n

Le chiffrement de bout en bout est au c\u0153ur de la s\u00e9curisation de messagerie<\/h2>\n\n\n\n

Les utilisateurs doivent exiger un certain niveau de confiance de la part de leurs fournisseurs ind\u00e9pendamment du fait que ces derniers revendiquent la \u00ab connaissance z\u00e9ro \u00bb de leurs services. Ces fournisseurs pr\u00e9tendent \u00ab ne rien savoir de vous \u00bb. Mais c\u2019est absolument faux. Nous avons vu divers cas de m\u00e9canismes secrets hautement r\u00e9put\u00e9s et solides dont les informations fuitent .<\/p>\n\n\n\n

(c-\u00e0-d : meta-donn\u00e9es: vers, de, heure, nombre de messages, heure de cr\u00e9ation du compte, etc.)<\/p>\n\n\n\n

Ce type d\u2019informations peuvent \u00eatre anonymis\u00e9es dans une certaine mesure, soit en les cachant, soit en les rempla\u00e7ant ou en les chiffrant. Malheureusement, nous n\u2019avons pas encore vu de m\u00e9canismes qui offrent une protection compl\u00e8te contre ce type de fuites de donn\u00e9es. Toutefois, certains projets int\u00e9ressant existent tels que DIME<\/a> ou LEAP<\/a>.<\/p>\n\n\n\n

Nous pensons que la premi\u00e8re \u00e9tape est de remettre les pendules \u00e0 l\u2019heure. Chez Mailfence, nous ne voulons pas donner une fausse impression de \u00ab nous ne savons rien sur vous \u00bb, mais plut\u00f4t offrir un niveau \u00e9lev\u00e9 de transparence<\/a> permettant d\u2019aboutir \u00e0 une confiance l\u00e9gitime.<\/p>\n\n\n\n

A notre avis, le chiffrement<\/a> de bout en bout joue un r\u00f4le crucial dans la mise sur pied de messageries s\u00e9curis\u00e9es. Il prot\u00e8ge les contenus des messages des utilisateurs en leur offrant la confidentialit\u00e9, l\u2019int\u00e9grit\u00e9 et l\u2019authenticit\u00e9.<\/p>\n\n\n\n

Chez Mailfence, nous pensons qu\u2019il est extr\u00eamement important de prot\u00e9ger la vie priv\u00e9e en ligne.  Ceci pour pr\u00e9server nos valeurs fondamentales et la libert\u00e9 d\u2019expression<\/strong>. Le contraire, la surveillance de toutes parts, serait tout simplement trop dangereux. Nous pensons qu\u2019ensemble, nous pouvons parvenir \u00e0 ce changement.  Afin de faire en sorte que notre soci\u00e9t\u00e9 ne soit plus surveill\u00e9e 24 heures sur 24 et sept jours sur sept. Nous pouvons y arriver via des petites \u00e9tapes efficaces. Si vous \u00eates d\u2019accord avec nous, rejoignez le mouvement en faveur d\u2019un e-mail s\u00e9curis\u00e9 et partagez notre message.<\/p>\n\n\n\n

Vous avez des questions concernant le chiffrement de bout en bout ? N’h\u00e9sitez pas \u00e0 contacter notre support (support at mailfence dot com).<\/p>\n\n\n\n

Suivez-nous sur twitter<\/a>\/reddit<\/a> et soyez au courant \u00e0 tous moments.<\/p>\n","protected":false},"excerpt":{"rendered":"

Tout le monde souhaite mettre la main sur vos donn\u00e9es d\u2019une fa\u00e7on ou d\u2019une autre. Il ne s\u2019agit pas seulement de la NSA, de Google, de Facebook ou de votre fournisseur t\u00e9l\u00e9com. M\u00eame l\u2019application lampe-torche de votre smartphone et le site d\u2019e-commerce que vous consultez tentent d\u2019acc\u00e9der \u00e0 vos informations priv\u00e9es. Mais nous devons malgr\u00e9 […]<\/p>\n","protected":false},"author":4,"featured_media":85903,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-1407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-securite"],"yoast_head":"\nE-mail s\u00e9curis\u00e9 : le chiffrement de bout en bout en est le c\u0153ur<\/title>\n<meta name=\"description\" content=\"E-mail s\u00e9curis\u00e9: Vous apprendrez pourquoi le chiffrement de bout en bout constitue le c\u0153ur des courriers \u00e9lectroniques s\u00e9curis\u00e9s.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.mailfence.com\/fr\/e-mail-securise-le-chiffrement-de-bout-en-bout-en-est-le-coeur\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta 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