Agile quantum privacy query method based on anti-rotation noise

Abstract

The invention discloses an agile quantum privacy query method based on anti-rotation noise, and the method comprises the steps: constructing a quantum state of transmission information according to aBell state by adopting a database, and generating a particle state sequence; utilizing a database to construct detection particles according to the Bell state, adding the detection particles into theparticle state sequence to generate a mixed sequence, and sending the mixed sequence to a query user; performing security detection by utilizing a query user according to detection particles in the mixed sequence; discarding all detection particles by utilizing a query user, and measuring residual particles by adopting a measurement base; publishing classic information by utilizing a database according to the sent quantum state; acquiring an original key by utilizing the query user according to the measurement result and published classical information; setting a security parameter, and generating a shared key; and retrieving entry information in the database according to the shared key by utilizing the query user. According to the invention, the rotation noise in the quantum channel is eliminated, the safety of quantum information transmission is ensured, and the quantum privacy query efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of quantum privacy query, in particular to an agile quantum privacy query method based on anti-rotation noise. Background technique [0002] Since the first BB84 protocol was proposed by Bennett et al., quantum secure communication has been a research hotspot. Quantum cryptography uses the principles of quantum physics to ensure the security of transmitted information, and classical cryptography based on the decomposition of large numbers is easily cracked. Therefore, quantum cryptography will make existing cryptosystems insecure. Quantum communication has many important branches, such as: Quantum Privacy Query (QPQ), Quantum Privacy Comparison (QPC), Quantum Secure Direct Communication (QSDC), Quantum Secret Key Sharing (QSS), Quantum Key Agreement Protocol (QKA), etc. [0003] The quantum privacy query protocol requires that the privacy of users and databases be guaranteed at the same time. That is to s...

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Problems solved by technology

[0005] 1. The existing quantum communication generally does not consider the noise interference in the channel, and thinks that quantum communication has the property of unconditional security

But the fact is that there is interference of phase noise and rotation noise in the quantum channel;

[0006] 2. In the past, the DF state with the ability to resist rotation noise and phase noise was generally used, but the construction of the DF state was difficult;

[0007] 3. The post-processing of most quantum privacy queries is to divide the key with a length of kN into k-segment keys with a length of N. After the key is compressed, the user generally can only obtain a one-bit key, so the user can only query the 1-bit key. database information

It is difficult for users of the previous protocol to realize the function of querying multi-digit database key information

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