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pythonpython-3.xclassrandomtrng

Should I only be using one or multiple instances of python's secrets.SystemRandom() class?

I am trying to generate random numbers securely and I found the secrets module, apparently the only way to generate random numbers is to have an instance of the secrets.SystemRandom class, but now I am confused, should I be using one or multiple instances of it for generating 17 random numbers in different and completely unrelated places?

EDIT 1: Documentation for secrets.SystemRandom() https://docs.python.org/3/library/random.html#random.SystemRandom

EDIT 2: The docs are from here https://docs.python.org/3/library/secrets.html

EDIT 3: After using https://grep.app/ and finding https://github.com/pyradius/pyrad/blob/master/pyrad/packet.py I think I only need to use one instance of the class, I will use it, if this is wrong, please leave a comment or an answer.

Solution

  • should I be using one or multiple instances of it for generating 17 random numbers in different and completely unrelated places?

    You only need one instance of random.SystemRandom. Create the instance and reuse it.

    >>> from random import SystemRandom
>>> rgenerator = SystemRandom()
>>> rint = rgenerator.randint
>>> rint(0, 10)
6