Just How Random Are Two Factor Authentication Codes?

You know two-factor authentication tokens, the ephemeral, six-digit numbers you use as a second layer of security when logging into, say, your email? Those constantly updating, randomly generated numbers are one of the easiest ways to protect your accounts from being hacked. But for some time now, I've harbored a pet conspiracy theory about those codes: Maybe they aren't as random as we're led to believe.

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