Question: Brute Force vs Birthday Attack. 2. Suppose that an adversary is trying to find a hash collision using a brute force attack. (a) What is

Brute Force vs Birthday Attack. 2. Suppose that an adversary is

Brute Force vs Birthday Attack.

2. Suppose that an adversary is trying to find a hash collision using a brute force attack. (a) What is the expected number of trials needed to produce a hash collision probability of 0.9 when MD5 is used? (7 pts) (b) What is the expected number of trials needed to produce a hash collision probability of 0.9 when SHA-1 is used? (7 pts) 3. Suppose that an adversary is trying to find a hash collision using a birthday attack. (a) What is the expected number of trials needed to produce a hash collision probability of 0.9 when MD5 is uscd? (7 pts) (b) What is the expected number of trials needed to produce a hash collision probability of 0.9 when SHA-1 is used? (7 pts)

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