Why doesn't python random number generator pass NIST tests?

Question

Python

#!/usr/bin/env python3
import random


while True:
        s = ""
        for i in range(0, 500):
                s = s + str(random.randint(0, 1))
        print(s)
        input()

Does this mean that it cannot be used in cryptography?

Answer 1

The random module computes random numbers using the Mersenne Twister algorithm ... Functions in random() should not be used in programs related to cryptography. If you need such functionality, consider using functions in the ssl module instead. For example, ssl.RAND_bytes() can be used to generate a cryptographically secure sequence of random bytes.

David Beazley

Answer 2

The built-in random never passes NIST tests. For the needs of cryptography, other sources of entropy are needed, for example, the secrets module .