{"id":150,"date":"2026-09-13T20:56:47","date_gmt":"2026-09-13T20:56:47","guid":{"rendered":"https:\/\/neranis.com\/?post_type=nrn_service&#038;p=150"},"modified":"2026-09-13T20:56:47","modified_gmt":"2026-09-13T20:56:47","slug":"cyber-due-diligence-et-integration-apres-lacquisition","status":"publish","type":"nrn_service","link":"https:\/\/neranis.com\/fr\/services\/cyber-due-diligence-and-post-acquisition-integration\/","title":{"rendered":"Cybers\u00e9curit\u00e9 et due diligence, et int\u00e9gration post-acquisition"},"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\/securite-specialisee\/\">S\u00e9curit\u00e9 sp\u00e9cialis\u00e9e<\/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\">SPC \/ SPC-03<\/p>\n\n\n<h1 class=\"wp-block-heading nrn2-title\">Cybers\u00e9curit\u00e9 et due diligence, et int\u00e9gration post-acquisition<\/h1>\n\n\n<p class=\"nrn2-lead wp-block-paragraph\">\u00c9valuer les cyberrisques lors d'une acquisition ou d'une fusion et planifier l'int\u00e9gration sans propager de vuln\u00e9rabilit\u00e9s entre les environnements. Le projet fournit des \u00e9l\u00e9ments de d\u00e9cision, et non une garantie contre tous les risques cach\u00e9s.<\/p>\n\n<\/div>\n\n\n<figure class=\"wp-block-image size-full nrn2-context-image nrn2-visual-asset-service-family-spc\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"500\" src=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-spc.webp\" alt=\"\" class=\"wp-image-254\" srcset=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-spc.webp 1600w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-spc-300x94.webp 300w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-spc-1024x320.webp 1024w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-spc-768x240.webp 768w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-spc-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\">Acquisition, fusion, prise de contr\u00f4le d\u2019entreprise, interconnexion pr\u00e9vue de deux environnements ou investisseur souhaitant comprendre les investissements de s\u00e9curit\u00e9 n\u00e9cessaires.<\/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\/securite-specialisee\/\">S\u00e9curit\u00e9 sp\u00e9cialis\u00e9e<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Engagement<\/strong><br>Expertise sp\u00e9cialis\u00e9e<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>R\u00e9f\u00e9rence<\/strong><br>SPC-03<\/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>Acc\u00e8s aux documents autoris\u00e9s<\/li>\n\n\n<li>Entrevues<\/li>\n\n\n<li>actifs critiques<\/li>\n\n\n<li>Incidents connus<\/li>\n\n\n<li>Identit\u00e9s<\/li>\n\n\n<li>contrats<\/li>\n\n\n<li>endettement technique<\/li>\n\n\n<li>exposition<\/li>\n\n\n<li>Des essais limit\u00e9s autoris\u00e9s<\/li>\n\n\n<li>plan d\u2019int\u00e9gration et priorit\u00e9s<\/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>R\u00e9sum\u00e9 ex\u00e9cutif<\/li>\n\n\n<li>Registre des risques<\/li>\n\n\n<li>limites de v\u00e9rification<\/li>\n\n\n<li>Sc\u00e9narios d'int\u00e9gration<\/li>\n\n\n<li>Contr\u00f4les de pr\u00e9-connexion<\/li>\n\n\n<li>Les besoins d'investissement doivent \u00eatre estim\u00e9s<\/li>\n\n\n<li>Plan de prise de contr\u00f4le<\/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\">Les conclusions sont fond\u00e9es sur des donn\u00e9es disponibles ; l\u2019incertitude est visible ; les actions pr\u00e9alables \u00e0 la connexion sont s\u00e9par\u00e9es des am\u00e9liorations ult\u00e9rieures ; les propri\u00e9taires et les points de d\u00e9cision sont identifi\u00e9s.<\/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\">V\u00e9rifier l\u2019expertise et l\u2019autorisation ; contraintes d\u2019\u00e9tendue ; collecter sans risque non approuv\u00e9 ; \u00e9valuer et proposer ; valider aupr\u00e8s des propri\u00e9taires comp\u00e9tents.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Pr\u00e9requis et responsabilit\u00e9s<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Client : autorit\u00e9 de d\u00e9cision, op\u00e9rateurs, ing\u00e9nieurs de contr\u00f4le ou responsables de transactions selon le cas. Prestataire : expertise valid\u00e9e ; partenaires sp\u00e9cialistes si n\u00e9cessaire et approuv\u00e9s.<\/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\">Sites, syst\u00e8mes, s\u00e9curit\u00e9, acc\u00e8s aux preuves, ind\u00e9pendance et exigences de qualification. Intervention sur mesure ; effort et sous-traitance confirm\u00e9s avant la proposition.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Questions \u00e0 clarifier<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Quelles informations sont accessibles avant la transaction ? Quand doivent-ils \u00eatre connect\u00e9s les syst\u00e8mes ? Quelles d\u00e9pendances et responsabilit\u00e9s doivent-elles \u00eatre transf\u00e9r\u00e9es ?<\/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\">L\u2019acc\u00e8s est soumis \u00e0 l\u2019autorisation des transactions et \u00e0 la confidentialit\u00e9. Ce service ne remplace ni la diligence financi\u00e8re ou juridique, ni une enqu\u00eate compl\u00e8te ; les co\u00fbts restent des estimations avant une \u00e9tude d\u00e9taill\u00e9e.<\/p>\n\n\n<p class=\"wp-block-paragraph\">La livraison est subordonn\u00e9e aux ressources sp\u00e9cialis\u00e9es, aux autorisations et aux exigences du cadre d\u00e9finies lors du cadrage. Les qualifications formelles et les habilitations sont confirm\u00e9es si n\u00e9cessaire.<\/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\">Un groupe acquiert une entreprise et souhaite disposer imm\u00e9diatement d\u2019une connectivit\u00e9 r\u00e9seau. Probl\u00e8me : v\u00e9rification de l\u2019identit\u00e9, de l\u2019exposition et de l\u2019acc\u00e8s avant la connexion. Objectif : l\u2019interconnexion est conditionn\u00e9e par des contr\u00f4les minimums et un champ d\u2019application restreint.<\/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\">Un investisseur dispose d\u2019un espace de donn\u00e9es limit\u00e9. Projet : examiner les \u00e9l\u00e9ments de preuve et identifier les questions bloquantes. Objectif \u00e0 atteindre : une vision \u00e9clair\u00e9e des risques visibles ; les documents manquants sont trait\u00e9s comme des incertitudes, et non comme des preuves de s\u00e9curit\u00e9.<\/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\">R\u00e9f\u00e9rences : Gestion des risques par le NIST et contr\u00f4les techniques pertinents ; collecte proportionn\u00e9e \u00e0 l\u2019\u00e9tape de la transaction et \u00e0 l\u2019autorisation.<\/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\">GRC-01<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/evaluation-des-risques-par-le-responsable-des-risques-debios\/\">\u00e9valuation des risques EBIOS Risk Manager<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Une m\u00e9thode structur\u00e9e reliant les objectifs commerciaux \u00e0 des sc\u00e9narios de cyber-risque et \u00e0 un plan de traitement d\u00e9cid\u00e9 par l'organisation.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/evaluation-des-risques-par-le-responsable-des-risques-debios\/\">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\">NET-02<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/network-segmentation-and-microsegmentation\/\">Segmentation du r\u00e9seau et microsegmentation<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">S\u00e9parez les environnements et restreignez la communication au strict n\u00e9cessaire afin qu'un appareil ou un service compromis n'obtienne pas un acc\u00e8s \u00e9tendu aux syst\u00e8mes d'information. La s\u00e9paration doit \u00eatre test\u00e9e, et non pas seulement mod\u00e9lis\u00e9e.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/network-segmentation-and-microsegmentation\/\">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\">RES-03<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/analyse-de-limpact-sur-les-activites-commerciales-continuite-des-operations-et-planification-de-la-reprise-apres-sinistre\/\">Analyse d'impact sur l'activit\u00e9, planification de la continuit\u00e9 et de la reprise apr\u00e8s sinistre<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">D\u00e9terminez quelles activit\u00e9s doivent reprendre en premier et pr\u00e9parez la continuit\u00e9 ou la restauration. La planification de la continuit\u00e9 des activit\u00e9s couvre les op\u00e9rations commerciales ; la reprise apr\u00e8s sinistre d\u00e9crit la restauration des syst\u00e8mes d'information de soutien.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/analyse-de-limpact-sur-les-activites-commerciales-continuite-des-operations-et-planification-de-la-reprise-apres-sinistre\/\">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>\u00c9valuer les cyberrisques lors d'une acquisition ou d'une fusion et planifier l'int\u00e9gration sans propager de vuln\u00e9rabilit\u00e9s entre les environnements. Le projet fournit des \u00e9l\u00e9ments de d\u00e9cision, et non une garantie contre tous les risques cach\u00e9s.<\/p>","protected":false},"featured_media":0,"template":"single-nrn_service","meta":{"footnotes":""},"nrn_family":[18],"class_list":["post-150","nrn_service","type-nrn_service","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/150","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\/150\/revisions"}],"predecessor-version":[{"id":545,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/150\/revisions\/545"}],"wp:attachment":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/media?parent=150"}],"wp:term":[{"taxonomy":"nrn_family","embeddable":true,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_family?post=150"}],"curies":[{"name":"Bien jou\u00e9","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}