{"id":114,"date":"2026-09-13T20:56:42","date_gmt":"2026-09-13T20:56:42","guid":{"rendered":"https:\/\/neranis.com\/?post_type=nrn_service&#038;p=114"},"modified":"2026-09-13T20:56:42","modified_gmt":"2026-09-13T20:56:42","slug":"gestion-des-cles-de-chiffrement-et-des-certificats","status":"publish","type":"nrn_service","link":"https:\/\/neranis.com\/fr\/services\/encryption-key-and-certificate-management\/","title":{"rendered":"Gestion du chiffrement, des cl\u00e9s et des certificats"},"content":{"rendered":"<section class=\"wp-block-group nrn2-section nrn2-page-hero is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-breadcrumb wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/\">Accueil<\/a> <span aria-hidden=\"true\">\/<\/span> <a href=\"https:\/\/neranis.com\/fr\/expertise\/\">Expertise<\/a> \/ <a href=\"https:\/\/neranis.com\/fr\/expertise\/protection-des-donnees\/\">Protection des donn\u00e9es<\/a><\/p>\n\n\n<div class=\"wp-block-group nrn2-service-top nrn2-hero-layout-r3 is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-hero-split-copy is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"nrn2-kicker wp-block-paragraph\">DAT \/ DAT-04<\/p>\n\n\n<h1 class=\"wp-block-heading nrn2-title\">Gestion du chiffrement, des cl\u00e9s et des certificats<\/h1>\n\n\n<p class=\"nrn2-lead wp-block-paragraph\">Prot\u00e9ger les donn\u00e9es et les communications gr\u00e2ce \u00e0 la cryptographie tout en organisant le stockage, la rotation et la r\u00e9cup\u00e9ration des cl\u00e9s et des certificats. Un chiffrement qui emp\u00eache la r\u00e9cup\u00e9ration peut lui-m\u00eame devenir un risque.<\/p>\n\n<\/div>\n\n\n<figure class=\"wp-block-image size-full nrn2-context-image nrn2-visual-asset-service-family-dat\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"500\" src=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-dat.webp\" alt=\"\" class=\"wp-image-248\" srcset=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-dat.webp 1600w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-dat-300x94.webp 300w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-dat-1024x320.webp 1024w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-dat-768x240.webp 768w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-dat-1536x480.webp 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n<\/div>\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-top is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-intro is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">QUAND C'EST UTILE<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Une r\u00e9ponse cibl\u00e9e<br>\u00e0 un besoin d\u00e9fini.<\/h2>\n\n\n<p class=\"nrn2-body-lg wp-block-paragraph\">Expiration de certificat non suivie, disques non chiffr\u00e9s, secrets \u00e9parpill\u00e9s, exigences contractuelles de chiffrement ou d\u00e9pendance \u00e0 une seule personne d\u00e9tenant les cl\u00e9s de r\u00e9cup\u00e9ration.<\/p>\n\n\n<div class=\"wp-block-buttons nrn2-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/neranis.com\/fr\/contact\/\">Discutez de ce service<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-facts is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">EN UN COUP D'\u0152IL<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Famille<\/strong><br><a href=\"https:\/\/neranis.com\/fr\/expertise\/protection-des-donnees\/\">Protection des donn\u00e9es<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Engagement<\/strong><br>Mise en \u0153uvre et conseil<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>R\u00e9f\u00e9rence<\/strong><br>DAT-04<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section nrn2-canvas is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">PORT\u00c9E ET R\u00c9SULTATS<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Ce que couvre la mission.<\/h2>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-delivery-card is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Port\u00e9e<\/h3>\n\n\n<ul class=\"wp-block-list nrn2-list\">\n<li>Inventaire<\/li>\n\n\n<li>cas d'utilisation<\/li>\n\n\n<li>chiffrement au repos \/ en transit<\/li>\n\n\n<li>gestion des cl\u00e9s<\/li>\n\n\n<li>IPK l\u00e0 o\u00f9 c'est n\u00e9cessaire<\/li>\n\n\n<li>renouvellement<\/li>\n\n\n<li>r\u00e9vocation<\/li>\n\n\n<li>sauvegarde de la cl\u00e9<\/li>\n\n\n<li>contr\u00f4les d'acc\u00e8s<\/li>\n\n\n<li>r\u00e9cup\u00e9ration<\/li>\n\n<\/ul>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-card is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Livrables<\/h3>\n\n\n<ul class=\"wp-block-list nrn2-list\">\n<li>Architecture cryptographique<\/li>\n\n\n<li>registre des certificats<\/li>\n\n\n<li>r\u00e8gles de cycle de vie<\/li>\n\n\n<li>proc\u00e9dures de r\u00e9cup\u00e9ration<\/li>\n\n\n<li>s\u00e9paration des t\u00e2ches<\/li>\n\n\n<li>tests<\/li>\n\n\n<li>consignes d'exploitation<\/li>\n\n<\/ul>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-card nrn2-evidence is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Preuve de r\u00e9ception<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Le chiffrement fonctionne pour des cas d'utilisation s\u00e9lectionn\u00e9s ; le renouvellement et la r\u00e9vocation sont test\u00e9s ; l'acc\u00e8s aux cl\u00e9s est restreint et consign\u00e9 ; les personnes autoris\u00e9es peuvent effectuer la r\u00e9cup\u00e9ration.<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">LIVRAISON<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Comment le travail est structur\u00e9.<\/h2>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-two-col is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-prose is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Approche<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Identifier les donn\u00e9es et les propri\u00e9taires ; d\u00e9finir les politiques ; piloter sur un p\u00e9rim\u00e8tre sensible ; mesurer les erreurs ; d\u00e9ployer et organiser les exceptions.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Pr\u00e9requis et responsabilit\u00e9s<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Client : propri\u00e9taires des donn\u00e9es m\u00e9tier, DPO\/juridique\/RH selon les besoins, administrateurs et r\u00e8gles de conservation. Fournisseur : conception technique et v\u00e9rification dans le cadre des autorisations convenues.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-prose is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Facteurs de port\u00e9e<\/h3>\n\n\n<p class=\"wp-block-paragraph\">D\u00e9p\u00f4ts, volumes, cat\u00e9gories, canaux, populations, formats et qualit\u00e9 des autorisations. La gestion des licences DLP\/classification et le traitement des \u00e9v\u00e9nements sont distincts du d\u00e9ploiement.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Questions \u00e0 clarifier<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Qui d\u00e9tient et peut utiliser les cl\u00e9s ? Que se passe-t-il lorsqu'un certificat expire ? Comment les donn\u00e9es chiffr\u00e9es sont-elles restaur\u00e9es apr\u00e8s la perte du syst\u00e8me principal ?<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section nrn2-compact is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-boundaries is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">LIMITES IMPORTANTES<\/p>\n\n\n<p class=\"nrn2-body-lg wp-block-paragraph\">Le chiffrement ne r\u00e9sout pas l'acc\u00e8s excessif dans une application qui d\u00e9chiffre les donn\u00e9es. Les choix cryptographiques et toutes les exigences de qualification n\u00e9cessitent une validation sp\u00e9cialis\u00e9e.<\/p>\n\n\n<p class=\"wp-block-paragraph\">La minimisation, la proportionnalit\u00e9 et la confidentialit\u00e9 de l'enqu\u00eate doivent \u00eatre d\u00e9limit\u00e9es. Aucune garantie de z\u00e9ro fuite ou d'avis juridique complet.<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">EN PRATIQUE<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Situations illustratives.<\/h2>\n\n<\/div>\n\n\n<p class=\"nrn2-section-lead wp-block-paragraph\">Ces exemples d\u00e9crivent des engagements possibles et des r\u00e9sultats cibles. Il ne s'agit pas de r\u00e9f\u00e9rences clients ni de r\u00e9sultats obtenus.<\/p>\n\n<\/div>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Sc\u00e9nario 01<\/summary>\n<p class=\"wp-block-paragraph\">Une entreprise subit des pannes li\u00e9es aux certificats. Projet : \u00e9tablir un inventaire, la propri\u00e9t\u00e9 et un renouvellement contr\u00f4l\u00e9. R\u00e9sultat vis\u00e9 : suivi des expirations et renouvellement testable, avec les certificats non automatisables explicitement g\u00e9r\u00e9s.<\/p>\n\n<\/details>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Sc\u00e9nario 02<\/summary>\n<p class=\"wp-block-paragraph\">Une \u00e9quipe chiffre des sauvegardes sans proc\u00e9dures de r\u00e9cup\u00e9ration. Projet : s\u00e9curiser les cl\u00e9s et effectuer une restauration ind\u00e9pendante. R\u00e9sultat vis\u00e9 : donn\u00e9es prot\u00e9g\u00e9es mais r\u00e9cup\u00e9rables ; les anciennes sauvegardes sans cl\u00e9s ne sont pas \u00e9tiquet\u00e9es comme r\u00e9cup\u00e9rables.<\/p>\n\n<\/details>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Contexte technologique et de r\u00e9f\u00e9rence<\/summary>\n<p class=\"wp-block-paragraph\">Exemples : services de gestion des cl\u00e9s, ICP et capacit\u00e9s de chiffrement des plates-formes ; HSM lorsque les exigences le justifient.<\/p>\n\n\n<p class=\"wp-block-paragraph\">L'ensemble final des technologies est convenu lors du cadrage, sur la base de l'interop\u00e9rabilit\u00e9, des licences, des droits d'acc\u00e8s et des exigences op\u00e9rationnelles.<\/p>\n\n<\/details>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">SERVICES CONNECT\u00c9S<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Construisez l'\u00e9tape suivante.<\/h2>\n\n<\/div>\n\n\n<p class=\"nrn2-section-lead wp-block-paragraph\">Ces services peuvent compl\u00e9ter la mission. Ils ne sont pas inclus automatiquement.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-related-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">IAM-07<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/certification-dacces-et-gouvernance-de-lacces\/\">Certification des acc\u00e8s et gouvernance des acc\u00e8s<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Organisation de campagnes au cours desquelles des responsables d\u00e9sign\u00e9s v\u00e9rifient que les autorisations des utilisateurs et des tiers restent justifi\u00e9es.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/certification-dacces-et-gouvernance-de-lacces\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">DAT-02<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/detection-et-prevention-des-pertes-de-donnees-multicanal-dlp\/\">Pr\u00e9vention des pertes de donn\u00e9es multicanal - DLP<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">D\u00e9tecter et r\u00e9gir les transferts de donn\u00e9es sensibles via certains canaux : e-mail, services cloud, terminaux ou supports amovibles. La DLP associe classification, politiques, exceptions et examen humain des \u00e9v\u00e9nements.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/detection-et-prevention-des-pertes-de-donnees-multicanal-dlp\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">AI-03<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/assistant-de-documents-rag-sensible-aux-autorisations\/\">Assistant de documents RAG sensible aux autorisations<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Connecter un assistant \u00e0 des documents d'entreprise sans accorder plus de acc\u00e8s que l'utilisateur n'en poss\u00e8de. Le RAG r\u00e9cup\u00e8re les documents avant de g\u00e9n\u00e9rer une r\u00e9ponse ; les autorisations doivent \u00eatre appliqu\u00e9es avant que les donn\u00e9es interdites n'entrent dans le contexte du mod\u00e8le.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/assistant-de-documents-rag-sensible-aux-autorisations\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-cta is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">Commencer une conversation<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Clarifiez la port\u00e9e.<\/h2>\n\n<\/div>\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-body-lg wp-block-paragraph\">Nous clarifierons l'objectif, les d\u00e9pendances et les responsabilit\u00e9s de ce service avant de proposer la livraison.<\/p>\n\n\n<div class=\"wp-block-buttons nrn2-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/neranis.com\/fr\/contact\/\">Discutez de vos priorit\u00e9s<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Prot\u00e9ger les donn\u00e9es et les communications gr\u00e2ce \u00e0 la cryptographie tout en organisant le stockage, la rotation et la r\u00e9cup\u00e9ration des cl\u00e9s et des certificats. Un chiffrement qui emp\u00eache la r\u00e9cup\u00e9ration peut lui-m\u00eame devenir un risque.<\/p>","protected":false},"featured_media":0,"template":"single-nrn_service","meta":{"footnotes":""},"nrn_family":[12],"class_list":["post-114","nrn_service","type-nrn_service","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service"}],"about":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/types\/nrn_service"}],"version-history":[{"count":2,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/114\/revisions"}],"predecessor-version":[{"id":509,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/114\/revisions\/509"}],"wp:attachment":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/media?parent=114"}],"wp:term":[{"taxonomy":"nrn_family","embeddable":true,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_family?post=114"}],"curies":[{"name":"Bien jou\u00e9","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}