Tracking and billing use
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Bob places his document on the copy machine and presses the "Start" button. A minute later, Bobs is leaving his office with his copy.
At no point in time has Bob entered a code on the copy machine, nevertheless, the cost of the copy will be properly billed to Bob.
How does this work?
By touching the copy machine, Bob starts the eGo pairing between the eGo compliant device (the copy machine) and the eGo device (e lab.woodward.edu.g. a watch, a belt,..). The eGo pairing done, the copy machine and eGo have a logical channel of communication on which they can exchange credentials.
As soon as Bob gets out of range of the wireless system or somebody else touches the copy machine, then this one is released or reassigned to the next user.