How to Generate Secure Random Numbers in Various Programming Languages(paragonie.com)

  Cryptographically Secure Randomness in .NET (C#)
  The generally accepted solution is to use System.Security.Cryptography.RNGCryptoServiceProvider

  Cryptographically Secure Randomness in Node.js
  Don't use crypto.randomBytes()

    >>> int
    <type 'int'>
    >>> int('10')
    10
    >>> int = 10
    >>> int('10')
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    TypeError: 'int' object is not callable

    (ql:quickload :secure-random)
    (secure-random:number 100) => 73
    (secure-random:bytes 20 secure-random:*generator*) => <a simple array with 20 random bytes>

  import time, sys, random
  
  
  def diorandom(m, n):
    start = time.time()
    for x in range(0, n):
      r = m.randint(0, 2**255)
    elapsed = time.time() - start
    return elapsed
  
  def diorandint(n):
    start = time.time()
    for x in range(0, n):
      r = random.randint(0, 2**255)
    elapsed = time.time() - start
    return elapsed
  
  
  if __name__ == '__main__':
    m = random.SystemRandom()
    modo1 = diorandom(m, 100000)
    modo2 = diorandint(100000)
    print('100,000 iterations')
    print('SystemRandom().randint: {}'.format(modo1))
    print('random.randint: {}'.format(modo2))