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For an m bit hash value, if we pick data blocks at random we can expect to find two data blocks with the same hash value within ____ attempts.

For an m bit hash value, if we pick data blocks at random we can expect to find two data blocks with the same hash value within ____ attempts. Correct Answer 2(m/2)

This is known as the birthday paradox. If we choose random variables from a uniform distribution in the range 0 through N-1, then the probability that a repeated element is encountered exceeds 0.5 after root (N) choices have been made.

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