Sit the Cryptography paper

Before you start

• You get 3 hours, the same as the real exam. The timer keeps running if you refresh.
• Write your answers on paper, like in the exam hall.
• Group A: Attempt any two questions. (2 × 10 = 20)
• Group B: Attempt any eight questions. (8 × 5 = 40)
• When you finish, open each worked answer and give yourself honest marks.