US Patent 10007355 Gesture-based information exchange between devices in proximity

Information items can be exchanged between user devices worn or carried by two different users in response to the devices detecting a “greeting event” in which the devices are in proximity and the users of the devices concurrently execute a greeting gesture. In response to detecting an event, each device can select zero or more information items or data objects to send to the other, with the selection being based on contextual information available to the device making the selection.