Question: Question 2: Alice and Bob need to communicate with each other by using the (unsecure) public network to share their files. If they are using

Question 2:

Alice and Bob need to communicate with each other by using the (unsecure) public network to share their files.
  1. If they are using secret key encryption, explain, with an example, the way they can securely share the secret key without meeting each other in person.
  2. Suppose Alice and Bob is not care about the confidentiality of the transmission, if they are only using secret key, show, with a diagram, how can they share their file to uphold integrity.
  3. Suppose Hash (e.g. MD5) is used, show, with a diagram, how can they share their file to uphold integrity. //Thank you very much :)

(10 Marks)

(15 Marks)

(15 Marks)

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