Apparatuses, systems, methods, and program products are disclosed for transaction based networks security. A data module determines a set of data that is common between a first device and a second device. A key module generates, on a first device, a communication key based on a set of data. A message module secures a message sent to a second device from a first device with a communication key. A second device accepts a message in response to a communication key matching a corresponding communication key generated on the second device.