For some people, trying to figure out if you’re being followed is a matter of physical safety for themselves or others. In this talk we’ll discuss a methodology for using low cost, off the shelf parts and some adequate python code to help determine if you’re being followed by analyzing wireless signals nearby.

We’ll cover methodology and best practices as well as challenges encountered during development and field testing. We’ll release the code so anyone who wants to build their own easily can, likely with parts they already have laying around.