Panera rolls out hand-scanning technology that has raised privacy concerns

Panera has piloted handprint scanners in two locations so far. The company plans to roll out the technology in additional locations across the country in the coming months. (Justin Sullivan/Getty Images)

This palm reader will not be able to tell your fortune, but it will figure out if you are part of Panera's loyalty program.

Over the next few months, the bakery-café chain will roll out scanners that can access customers' credit card and loyalty account using their palm. The biometric-gathering technology, developed by Amazon and called Amazon One, is already popular in airports, stadiums and Whole Foods Market grocery stores. Panera is expected to become the first national restaurant company to use it.