A Secret Information Preservation Scheme Based on Four-qubit Entangled State

With the improvement of people’s security awareness, the security of personal information has attracted more and more attention. This paper proposes a scheme that considers the preservation of personal information fundamentally. It is based on quantum cryptography. The scheme uses four-qubit entangled states and unitary operation to preserve or read information. In addition, quantum key distribution and one-time pad are used to ensure the security of message transmission. Finally, security analysis shows that the scheme is feasible.