[yuy910616]

Hi Lena, Great answer! Congrats on launching. I do have a few more counterpoints.

Thinking about this from a individual fraudster perspective. Acquiring a stolen cc is not an easy transaction, there is risk, and cost involved. So I think each fraudster would be trying to maximize the value of each stolen cc they have on hand. When you have a system that doesn't tell the fraudster what is causing the stolen cc to be rejected, the fraudster has nothing but trial&error to improve their chance, maybe instead of public wifi they have to use a private one, maybe instead of a gmail account they have to use a edu account. But in this case, if they know that a embossing kit will significantly improve their chance, wouldn't they spend the money and get that technology?

The bottom line is this technology has to make it more expensive for the fraudster to throw their hands up and say "well i better go try a different place". but I'm not sure if the barrier is high enough here. Furthermore, if you have an 'invisible' barrier, then it is all about trial and error, if you have a 'visible' barrier, I think it is just going to garner more attention and more people trying to solve it?

[julia-zheng]

So actually acquiring stolen cc numbers is very easy - there's a bunch of marketplaces that sell thousands of them. Figuring out a scalable way to extract value out of them, however, is hard. More than visible or invisible barriers, what makes a fraudster want to spend time getting around the defenses of a specific business is the value of the offering (e.g., banks vs an app that sells a service)