Question: Describe how a simple shared key authentication protocol can be implemented and hence how a session encryption key can be securely shared between the two

Describe how a simple shared key authentication protocol can be implemented and hence
how a session encryption key can be securely shared between the two participants after
completion of the authentication phase.
Explain why this approach might NOT be suitable for a scenario where autonomous
vehicles are receiving safety critical data from roadside infrastructure.
Explain how public key-based authentication might operate in order to provide a better
alternative for the above application.
Outline why message integrity might also be important in this application and describe
how it too could be achieved using a public key-based approach.

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