Quantum tagging: Authenticating location via quantum information and relativistic signaling constraints
Quantum tagging: Authenticating location via quantum information and relativistic signaling constraints
We define the task of {\it quantum tagging}, that is, authenticating the classical location of a classical tagging device by sending and receiving quantum signals from suitably located distant sites, in an environment controlled by an adversary whose quantum information processing and transmitting power is unbounded. We define simple security …