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I am planning to implement an Interactive Voice Recognition (IVR) functionality in my python-based application. I will be using IVR as a backup verification method or when a user is going to setup her 2FA for the first time.

What are the security consideration of implementing an IVR functionality that I need to consider in my application?

I've found a few articles like the below, but they only talk about implementation and nothing around the security:

protected by Community Feb 8 '16 at 10:19

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