Question 1

"A malicious user can delete unwanted or outdated data from a public blockchain." Based on

your understanding of a public blockchain, do you agree with this statement? Illustrate your

reasons.

(8 marks)

Question 2

"The consensus algorithm for a public blockchain is designed in such a way that a user would

get a higher return by honestly validating transactions and updating the ledger instead of

attempting to manipulate the ledger (e.g., to double-spend)." Is this statement true or false?

Discuss and justify your answer.

(12 marks)

Question 3

The digital signature encrypts the content of a transaction so that it preserves the privacy of the

user. Appraise this statement.

(16 marks)

Question 4

A cryptocurrency wallet is used to store a user's private key. Compare the working mechanisms

of hot wallet, cold wallet, and cold storage. You are highly encouraged to use a table for

comparison.

(18 marks)