Post
Topic
Board Development & Technical Discussion
Re: How computationally expensive is an ECDSA and signature calculation?
by
Realpra
on 25/09/2013, 06:04:01 UTC
You do understand that that's impossible right? If the terminal is bogus, and the terminal is the only thing that can communicate with the card, then you can't make this secure.
It's not a problem for credit cards, because you can just do a chargeback, but they do have the same vulnerability.
Just saying things don't make them true and you clearly have no idea what you are talking about.

Its all about protocol, if it is secure it doesn't matter if the terminal is trusted or not - much like Bitcoin client communication.