Question

1)If h(x) is 20 bits, how many values, in theory, do you need to compute before you can expect to find a collision with 50% of probability?

Group of answer choices

a)2^15 = 32768

b)2^19 = 524288

c)2^20 = 1048576

d)2^10 = 1024

2)You have 2 56 possible different passwords

How many tries do you need in average to find the password with an exhaustive key search?

Group of answer choices

a)2

b)2^55

c)2^28

d)2^56

3)These are the Equal Error Rates of 4 Biometrics:

A: 10.0

B: 0.0001

C: 0.1

D: 1.0

If you need to use the most accurate among them, which one would you choose?

Group of answer choices

a)D

b)A

c)C

d)B

Answer 1