1. A method implemented by a computer for automatically admitting a device to a computer network, the method comprising: receiving, from the one or more authorized devices in the computer network, first data that is associated with one or more sensing modalities, wherein the one or more sensing modalities are detected by the one or more of the one or more of the authorized devices during a defined time window; identifying, via a processor, a new device to be admitted to the computer network; constructing a time sequence of proximity events of the new device, within the defined time window, based on the first data, wherein each proximity event is associated with a physical proximity between the new device and at least one of the one or more sensing modalities; determining that the time sequence of the proximity events matches an expected time sequence of expected proximity events; and admitting the new device to the computer network based on the determining.