How DC provide the TGT token to user?

In Active Directory, the Domain Controller (DC) provides the TGT (Ticket Granting Ticket) token to the user after the user has been successfully authenticated using the Kerberos protocol. The TGT is used by the user to request and obtain service tickets for accessing network resources.

The process of how the DC provides the TGT token to the user involves the following steps:

1. The user sends a request for a TGT to the KDC (Key Distribution Center) on the DC.
2. The KDC on the DC validates the user’s credentials by checking the user’s password hash against the information stored in Active Directory.
3. If the user’s credentials are valid, the KDC generates a TGT for the user, which includes the user’s identity, a timestamp, and a session key encrypted with the user’s password.
4. The KDC sends the encrypted TGT back to the user.
5. The user decrypts the TGT using their password and stores it in memory as a cached credential.
6. The user can use the TGT to request and obtain service tickets for accessing network resources without having to re-authenticate with the KDC.

The TGT is valid for a certain period of time, typically 10 hours by default in Active Directory, and can be renewed automatically by the user’s computer or device when it expires. The TGT is used to obtain service tickets for accessing network resources, with each service ticket being specific to a particular network resource and valid for a limited period of time.

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