When Theo Patt was 15 he built a software program that displayed his Google location data on a map online. For the teenager, it was a sentimental keepsake. But since then, hundreds of thousands of people have used it -- often in ways Theo never intended. This week on Decrypted, Bloomberg Technology’s Alistair Barr and Pia Gadkari explore the myriad secrets that our location data can reveal and some of the ways it can be used against us.
Running time 24:12