Password Entropy

Problem

Return the entropy in bits of a uniformly random password drawn from a charset of the given size with the given length:

H = length * log2(charset_size)

Hint

Each character adds log2(charset_size) bits of entropy.

case 1

in: [26,8]

expected: 37.603517745128734

case 2

in: [10,4]

expected: 13.287712379549449

case 3

in: [2,1]

expected: 1

case 4

in: [95,8]

expected: 52.55884486664758

Starter codePython

import math
def password_entropy(charset_size, length):
    # Your code here
    pass

4 test cases · run your code against them in the editor