I recently went down a rabbit hole after hearing how a major bank’s ATM face scanners were defeated by a literal piece of printer paper. It’s a classic example of what happens when we build for the "happy path" instead of the real world. If you’re building biometrics for something like employee clock-ins or secure access, you can’t just rely on a basic detection demo—you need a pipeline that actually knows the difference between a human and a photo. This article walks through building a cross...