Question: Question 3 (a) Define perfect secrecy. Discuss how the Vernam (i.e., one-time pad) cipher works, its limitations and explain why the cipher is perfectly secure.

Question 3

(a) Define perfect secrecy. Discuss how the Vernam (i.e., one-time pad) cipher works, its limitations and explain why the cipher is perfectly secure. (12 marks)

(b) Describe the characteristics of symmetric and asymmetric encryption, respectively. Give one (1) example of existing symmetric and asymmetric encryption scheme, respectively, and give a real-life application where hybrid encryption is used. (13 marks)

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