4NCA: 4.1 List ways in which secret keys can be distributed to two communicating parties. 4.2...

4NCA:

4.1 List ways in which secret keys can be distributed to two communicating parties.
4.2 What is the difference between a session key and a master key?
4.3 What is a key distribution center?
4.4 What entities constitute a full-service Kerberos environment?
4.5 In the context of Kerberos, what is a realm?
4.6 What are the principal differences between version 4 and version 5 of Kerberos?

Expert Solution

List ways in which secret keys can be distributed to two communicating parties.

Ways in which secret keys can be distributed to two communicating parties

Key selected by A and physically delivered to B.
Third party selects the key and physically delivered it to A and B.
If A and B have recently used a key, one party could transmit the new key to the other, using the old key to encrypt the new key.
If A and B each have an encrypted connection to a third party C, C could deliver a key on the encrypted links to A and B.

What is the difference between a session key and a master key?

Temporary encryption key used between two principals. Is called a session key.

A long-lasting key that is used between a key distribution center and a principal for the purpose of encoding the transmission of session keys is called a master key. Master keys are distributed by non-cryptographic means.

What is a key distribution center?

A system that is authorized to transmit temporary session keys to principals is called a key distribution center. Each session key is transmitted in encrypted form, using a master key that the key distribution center shares with the target principal.

What entities constitute a full-service Kerberos environment?

Number of application servers
Kerberos server
Number of clients

In the context of Kerberos, what is a realm?

The realm is an environment in which

The Kerberos server must have the user ID and hashed password of all participating users in its database. All users are registered with the Kerberos server.
The Kerberos server must share a secret key with each server. All servers are registered with the Kerberos server.

What are the principal differences between version 4 and version 5 of Kerberos?

V4 has some environmental shortcomings and some technical deficiencies. V5 overcomes these deficiencies and shortcomings.

venereology answered 7 months ago

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