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1. What is a message authentication code? [1 Marks] 2. What are some approaches to producing message authentication? [3 Marks] 3. Explain the difference between

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1. What is a message authentication code? [1 Marks] 2. What are some approaches to producing message authentication? [3 Marks] 3. Explain the difference between weak and strong collision resistance. [4 Marks] 4. What is the difference between direct and arbitrated digital signatures? List the threats associated with direct digital signatures. [8 Marks]

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