Is it more risky than getting a fake cash from someone? Is it difficult to validate NFC with say...your phone (make sure the NFC signal changes when you bring it close to your phone)?
For 2) I get the part about relaying communication but regardless of that, what makes you think any sort of communication will cause it to output the private key?
As far as high powered NFC, I am not sure that would work to begin with (someone who knows radio explained it to me but I cannot recall) but even if it did how is it different than existing mobile phone NFC payment?
You also gotta keep in mind,this is in-person. If someone defrauds you, they face several risks including law enforcement,legal,phsyical altercation(violence) and more.
Better would be nice but I can live with "as good as cash" or "as good as mobile nfc payment" when it comes to security.
For 2) I get the part about relaying communication but regardless of that, what makes you think any sort of communication will cause it to output the private key? As far as high powered NFC, I am not sure that would work to begin with (someone who knows radio explained it to me but I cannot recall) but even if it did how is it different than existing mobile phone NFC payment?
You also gotta keep in mind,this is in-person. If someone defrauds you, they face several risks including law enforcement,legal,phsyical altercation(violence) and more.
Better would be nice but I can live with "as good as cash" or "as good as mobile nfc payment" when it comes to security.