{"id":5597,"date":"2019-09-21T13:29:54","date_gmt":"2019-09-21T13:29:54","guid":{"rendered":"https:\/\/kb.mailfence.com\/kb\/quest-ce-quune-signature-numerique-et-comment-fonctionne-t-elle\/"},"modified":"2025-01-22T10:08:39","modified_gmt":"2025-01-22T10:08:39","slug":"signature-numerique","status":"publish","type":"ht_kb","link":"https:\/\/kb.mailfence.com\/fr\/kb\/signature-numerique\/","title":{"rendered":"Qu&rsquo;est-ce qu&rsquo;une signature num\u00e9rique et comment fonctionne-t-elle ?"},"content":{"rendered":"\n<p>Une signature num\u00e9rique est une forme de signature \u00e9lectronique qui peut \u00eatre utilis\u00e9e pour authentifier la personne qui a sign\u00e9 un document.\nElle prouve que l&rsquo;exp\u00e9diteur est bien celui qu&rsquo;il pr\u00e9tend \u00eatre. <\/p>\n\n\n\n<p>Dans ce guide, nous allons voir comment configurer une signature num\u00e9rique dans votre compte Mailfence. Vous souhaitez en savoir plus sur les signatures num\u00e9riques ? Consultez <a href=\"https:\/\/blog.mailfence.com\/fr\/securite-emails-signatures-numeriques\/\" target=\"_blank\" rel=\"noreferrer noopener\">notre article de blog ici<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-mise-en-place-d-une-signature-numerique-dans-mailfence\">Mise en place d&rsquo;une signature num\u00e9rique dans Mailfence<\/h2>\n\n\n\n<p class=\"wp-block-ht-blocks-messages wp-block-hb-message wp-block-hb-message--withicon is-style-alert\">Cette proc\u00e9dure n\u00e9cessite que vous ayez pr\u00e9alablement cr\u00e9\u00e9 votre propre paire de cl\u00e9s OpenPGP.\nVous trouverez plus d&rsquo;informations sur la fa\u00e7on de proc\u00e9der <a href=\"https:\/\/kb.mailfence.com\/fr\/?post_type=ht_kb&amp;p=5681\" target=\"_blank\" rel=\"noreferrer noopener\">ici<\/a>. <\/p>\n\n\n\n<p>1. Allez dans <strong>Messages<\/strong> et cliquez sur <strong>Nouveau<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"399\" height=\"101\" src=\"https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-1.jpeg\" alt=\"envoyez un courrier \u00e9lectronique sign\u00e9 num\u00e9riquement par openpgp\" class=\"wp-image-3045\" srcset=\"https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-1.jpeg 399w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-1-300x76.jpeg 300w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-1-50x13.jpeg 50w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-1-60x15.jpeg 60w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-1-100x25.jpeg 100w\" sizes=\"auto, (max-width: 399px) 100vw, 399px\" \/><\/figure>\n<\/div>\n\n\n<ul class=\"wp-block-list\">\n<li>Cliquez sur la liste d\u00e9roulante du champ \u00a0\u00bb <strong>De\u00a0\u00bb<\/strong> pour s\u00e9lectionner l&rsquo;adresse de l&rsquo;exp\u00e9diteur pour laquelle vous souhaitez utiliser la paire de cl\u00e9s associ\u00e9e pour signer ce courrier \u00e9lectronique.<\/li>\n<\/ul>\n\n\n\n<p>2. Apr\u00e8s avoir r\u00e9dig\u00e9 votre message, cliquez sur le <strong>menu d\u00e9roulant<\/strong> au-dessus du bouton <strong>Envoyer<\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"379\" height=\"139\" src=\"https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-2.jpeg\" alt=\"envoyez un courrier \u00e9lectronique sign\u00e9 num\u00e9riquement par openpgp\" class=\"wp-image-3043\" srcset=\"https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-2.jpeg 379w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-2-300x110.jpeg 300w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-2-50x18.jpeg 50w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-2-60x22.jpeg 60w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-2-100x37.jpeg 100w\" sizes=\"auto, (max-width: 379px) 100vw, 379px\" \/><\/figure>\n<\/div>\n\n\n<p>3. Cliquez sur <strong>Signer et envoyer<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Si vous disposez de plusieurs paires de cl\u00e9s OpenPGP\/cl\u00e9s personnelles correspondant \u00e0 l&rsquo;adresse de l&rsquo;exp\u00e9diteur, vous serez invit\u00e9 \u00e0 choisir celle que vous souhaitez utiliser pour signer votre message.<\/li>\n<\/ul>\n\n\n\n<p>4. Saisissez votre paire de cl\u00e9s OpenPGP\/phrase de passe de cl\u00e9 personnelle et cliquez sur <strong>OK<\/strong>. Vous avez envoy\u00e9 un <a href=\"https:\/\/blog.mailfence.com\/fr\/securite-emails-signatures-numeriques\/\">mail sign\u00e9 OpenPGP<\/a>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"314\" height=\"167\" src=\"https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-3.jpeg\" alt=\"envoyez un courrier \u00e9lectronique sign\u00e9 num\u00e9riquement par openpgp\" class=\"wp-image-3044\" srcset=\"https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-3.jpeg 314w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-3-300x160.jpeg 300w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-3-50x27.jpeg 50w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-3-60x32.jpeg 60w, https:\/\/kb.mailfence.com\/wp-content\/uploads\/2022\/03\/how-to-send-an-openpgp-digitally-signed-email-3-100x53.jpeg 100w\" sizes=\"auto, (max-width: 314px) 100vw, 314px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-ht-blocks-messages wp-block-hb-message wp-block-hb-message--withicon is-style-info\">Mailfence ne permet pas de signer des mails \u00e0 l&rsquo;aide de paires de cl\u00e9s OpenPGP\/cl\u00e9s personnelles r\u00e9voqu\u00e9es\/expir\u00e9es.<\/p>\n\n\n\n<p>Le destinataire devra disposer de votre cl\u00e9 publique OpenPGP pour pouvoir valider votre signature num\u00e9rique. Vous pouvez partager votre cl\u00e9 publique OpenPGP <a href=\"https:\/\/mailfence.com\/fr\/\">par courrier \u00e9lectronique<\/a>.<\/p>\n\n\n\n<p><strong><em>Vous avez encore des probl\u00e8mes avec les signatures num\u00e9riques ?<br>Contactez notre <a href=\"https:\/\/mailfence.com\/fr\/contact.jsp\">service d&rsquo;assistance<\/a>. <\/em><\/strong><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une signature num\u00e9rique est une forme de signature \u00e9lectronique qui peut \u00eatre utilis\u00e9e pour authentifier la personne qui a sign\u00e9 un document. Elle prouve que l&rsquo;exp\u00e9diteur est bien celui qu&rsquo;il pr\u00e9tend \u00eatre. Dans ce guide, nous allons voir comment configurer une signature num\u00e9rique dans votre compte Mailfence. Vous souhaitez en&#8230;<\/p>\n","protected":false},"author":1,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[1136],"ht-kb-tag":[],"class_list":["post-5597","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-cryptage-et-signature-numerique-openpgp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Qu&#039;est-ce qu&#039;une signature num\u00e9rique et comment fonctionne-t-elle ? - Mailfence Support<\/title>\n<meta name=\"description\" content=\"L&#039;utilisation d&#039;une signature num\u00e9rique est le meilleur moyen de prouver l&#039;authenticit\u00e9 d&#039;un courriel. 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