A semi-quantum authenticated key agreement protocol method based on an inadvertent state preparation

Abstract

The application discloses a semi-quantum authenticated key agreement protocol based on an involuntary state preparation, and the protocol comprises the following steps: a classical user and a quantum server respectively perform a key generation algorithm, the classical user performs the key generation algorithm to generate a key; the classical user and the quantum server respectively perform a key encapsulation algorithm to generate an encapsulated key, and the quantum server performs the key encapsulation algorithm to output a quantum state and measurement information; the quantum server and the classical user respectively perform a key decapsulation algorithm to generate an intermediate key; the classical user performs the key decapsulation algorithm by using the quantum state and the measurement information to obtain a measurement mapping key, and calculates a classical user session key and a quantum server session key. The application combines quantum involuntary state preparation and a Kyber anti-quantum key encapsulation algorithm, has anti-quantum security with computational security, and realizes that the classical user and the quantum server can realize authenticated key agreement only by using a classical channel.

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