Imagine paying for a sandwich by simply hovering your hand over a sensor – no credit card or device needed. Panera is bringing this functionality to a handful of its stores, with more to follow in the coming months. Through a new partnership with Amazon, in-store Panera guests can link their unique palm signature to their credit card. In the process, these guests can link to their rewards account as well, making it possible to access favorite orders with a wave of your hand. Further, Amazon claims that because the person must be physically present to use the feature, it’s more secure and safe than biometric data. The new payment process could indicate where the conversation is going when it comes to securing shared data.