Key Space Bits

Problem

Return the size of a keyspace in bits: log2(number_of_keys). This is the security level of a uniformly random key from that space.

Hint

A one-key space has zero bits of security.

case 1

in: [256]

expected: 8

case 2

in: [1024]

expected: 10

case 3

in: [1]

expected: 0

case 4

in: [208827064576]

expected: 37.603517745128734

Starter codePython

import math
def keyspace_bits(keyspace):
    # Your code here
    pass

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