I've known this issue for a while just didn't know the name is deepfake as proposed by you.
This thing didn't start today, it's been on the silver screen for a while, used in movies, mimicking and action like the original. But the challenges you posses here never occurred to me.
I guess new age new challenges, we will surely find a way through this..
Thank you for your reply @botefarm!
That's right, however, this technology has stated to develop rapidly recently. We didn't have sufficient technology to use deepfake, but nowadays everyone is able to use it on personal computer. That's way the problem is much more interesting.