> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/fr/active-directory/kerberos/kerberos-key-components.md).

# Composants clés de Kerberos

#### KDC

Le **KDC**, ou **Centre de distribution des clés**, est installé sur le contrôleur de domaine.

Il est responsable de l’émission des tickets Kerberos.

Il contient deux composants principaux :

* **AS** : Service d’authentification ;
* **TGS** : Service d’octroi de tickets.

#### AS — Service d’authentification

Le **AS** est la partie du KDC responsable de l’authentification initiale de l’utilisateur.

Cela se produit lorsque l’utilisateur se connecte au domaine.

#### TGS — Service d’octroi de tickets

Le **TGS** est la partie du KDC responsable de la fourniture des tickets pour accéder à des services spécifiques.

Exemples de services :

* partage SMB ;
* service HTTP ;
* MSSQL ;
* LDAP ;
* CIFS ;
* service d’application interne.

#### compte krbtgt

Dans Active Directory, un compte spécial est créé par défaut :

```
krbtgt
```

Ce compte est utilisé par le KDC pour signer et chiffrer certains tickets Kerberos.

Il est extrêmement sensible, car il est lié au fonctionnement de l’authentification Kerberos dans le domaine.

<figure><img src="/files/c91297a0ed2527c1f08a02950004787c483aaeb1" alt=""><figcaption></figcaption></figure>


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