I have a website that contains a secure area accessible by logging in with account info. Within the secure area, I have some expensive IP. I have been finding that people are sharing their password...

facebook audience network always quality check fail. I followed all best practices which show on this link. https://developers.facebook.com/docs/audience-network/best-practices and uploaded many...

I'm developing a marketplace website where tutors and students can find each other. I'm building an online payment system (much like elance or guru.com) where the tutor can get paid and we take a c...

I'm working for a company that is generating gift card codes which can be used to pay for goods on online stores. I'm wondering what the most secure way of generating these gift card codes are. T...

When signing up for new accounts, web apps often ask for the answer to a 'security question', i.e. Dog's name, etc. I'd like to go through our database and look for instances where users just mash...

My team is discussing how we can improve the fraud prevention algorithms on a customer's platform. It's not surprising that email addresses used in fraudulent activities are often registered with f...

I have a fraud detection algorithm, and I want to check to see if it works against a real world data set. My algorithm says that a claim is usual or not. Are there any data sets available? ...

I would like to check if a paypal user who tries to buy something from my site has a verified account before he makes purchase. Once the user isn't verified, any payment he/she makes would fail. F...

Ok I'm going to talk about paypal. The reason for this is it's really hard to get a merchant account that will accept that you are selling digital goods. So for that reason paypal is the only...

Which methods do Google (and other PPC companies) use to prevent click fraud?

I'm involved in building a donation form for non-profits. We recently got hit by a fast round of low dollar submissions. Many were invalid cards, but a few went through. Obviously someone wrote a s...