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by vinay_ys 913 days ago
I get the warning "your contact key has changed.." all the time with various contacts on WhatsApp. What am I supposed to do? there's no clear next steps to debug / report of suspicious activity. In such cases, users get trained to become complacent of such warnings.
1 comments

You're supposed to meet up with that contact and verify the new key.

If even 0.1% of users did that, it would be 2 million verifications. And yet nobody has ever announced they have found a non-matching key.