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Why does your authenticator app code expire in exactly 30 seconds?
Why does your authenticator app code expire in exactly 30 seconds? I looked at it from a backend point of view. It is not a random number someone picked. It is a proper algorithm running on two sides at once: the app on your phone and the server. Here is the flow ⏬ When you first link the app, the server generates a secret key and shares it ...
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