While your palm and vein patterns are permanent, the digital palm signature we use for identification is not. Unlike a credit card or password, your Amazon One palm signature can’t be replicated to impersonate you. This is because Amazon One does not use raw palm images to identify a person. Instead, it looks at both palm and underlying vein structure to create a unique numerical, vector representation—the palm signature—for identity matching. This allows us to delete palm signatures and generate new ones, at any time.