1 What are some threats associated with a direct digital signature scheme? 2 List ways in which secret keys can be distributed to two communicating parties. 3 What is the difference between a session...

1
What are some threats associated with a direct digital signature scheme?

2
List ways in which secret keys can be distributed to two communicating parties.

3
What is the difference between a session key and a master key?

4
What is a nonce?

5
What is a key distribution center?