Google has a team of 100 people working on a project so secretive most of them can only reveal their first names

Google has an extremely secretive unit working to combat advertising fraud — many people within Google don't even know the team exists, but AdAge was given the first look at what the team of about 100 people is working on.

Google's ad-fraud-fighting unit is extremely secretive.

Advertising fraud is a serious problem. The Internet Advertising Bureau predicts ad fraud could cost brands as much as