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Explain the Advantage of using a Key Distribution Center KDC to provide secure communication?
Wiki User
∙ 15y ago
A Key Distribution Center (KDC) is a system used to minimize the risks in exchanging symmetric keys between users. In networking, the KDC is a trusted third party server that authenticates two untrusted users and then exchanges keys between them.
The KDC only works if both users have previously registered.
A client (generally a user or host) sends a request for a ticket to the KDC. The KDC creates a Ticket-Granting Ticket (TGT) for the client and encrypts it using the client's password as the key. It then sends the encrypted ticket back to the client. At this point, the client attempts to decrypt the TGT using its password. If the client successfully decrypts the TGT (which means it provided the correct password), it keeps the decrypted TGT as proof of its identity.
TGTs are not indefinite; they expire at a specified time. Having the TGT, however, allows the client to obtain additional tickets, which grant permission to access specific services. These additional tickets are transparent to the users and require no additional work on their part.
Wiki User
∙ 15y ago
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