Hints for Exercises (Chapter 12)
- Exercise 1: Xoring the two encryption deletes the one-time key.
- Exercise 3: Instead of using a function from t bits to 1, we now have a function from t+k bits to k+1.
- Exercise 5: At a given point in time, the possible output values from A and B are either equal or different. If they are equal, predicting a bit of A is easy. What happens when they are different.
- Exercise 7: For plain parity checks, you can always assume that the first output bit is included.
- Exercise 9: The new bit is a function of the stored bits.
Credits for page styles: Dynamic Drive CSS Library