This is a three part question. For each part the answer requires identifying an asymmetric encryption technique, hashing or both. As part of each question you need to discuss the technique to demonstrate your understanding of how the functionality (confidentiality, authenticity, integrity) is supported. You need to discuss the details of what the sender and receiver do and the key usage if applicable.

a) What technique is used to exchange messages between two parties ensuring confidentiality? Discuss.

b) What technique is used to exchange messages between two parties ensuring authenticity? Discuss.

c) What technique is used to exchange messages between two parties ensuring integrity? Discuss.