zlacker

About the SMS verification, it depends on the goal. If the goal is to verify a phone number, you can't trust the _sender's_ address in the phone network.

So, you can't trust the address in the "From" on an SMS or the "From" of a phone call.

That means a voice call to Signal would not work to validate phone numbers.

>>jpollo+(OP)
Good point, I guess we are proving why the resorted to using numbers in the first place. Unless you have a verification point that includes a "charge". Indirect or direct, your platform gets flooded with spam/bots. Does anyone have ideas of how this problem can be solved while also preserving privacy?

Problem: A system that enforces a monetary penalty to prevent sign up abuse while also not tying a users identity to said system.

Without doing some pain in the a crypto stuff it seems like there are no easy solutions other than the #