Quantum Identification Protocol with Trusted Author

Abstract

In this paper, we propose a quantum identification protocol with trusted author between two entities in quantum channel. At first, the user deposits n different sets of entangled states to trusted author. Whenever the verifier wants to verify the user’s identity, the trusted author would give a set of the first qubits of entangled states to the verifier. The verifier chooses a random numbers and applies the operator X or nothing to the shared entangled states according to the numbers r. Two entities both measure shared states and get two measured values. According to two measured values, the user determines the number r’. The verifier compares two numbers r and r’ to determine the protocol which is success or fail. Moreover, our protocol relies on the usage of entanglement.