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A two-client quantum entrusted joint computing method

A quantum computing and computing method technology, applied in the field of blind quantum computing, can solve problems such as entrusted computing tasks that cannot support multi-client joint

Active Publication Date: 2021-02-19
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] However, Broadbent et al. proposed that the DQC model can only solve the quantum entrusted computing problem of a single client, that is, it can only solve the general quantum entrusted computing of a single client, and cannot support the joint entrusted computing tasks of multiple clients.

Method used

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  • A two-client quantum entrusted joint computing method
  • A two-client quantum entrusted joint computing method
  • A two-client quantum entrusted joint computing method

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Embodiment Construction

[0041] The technical solution of the present invention will be described below in conjunction with the accompanying drawings.

[0042] The main technical steps of technical solution implementation of the present invention are as figure 1 As shown, the specific content is as follows:

[0043] (i): Client C 1 preparation of quantum states (α 1 ) 2 +(β 1 ) 2 = 1; Client C 2 Prepare quantum state |φ>=α 2 |0>+β 2 |1>, (α 2 ) 2 +(β 2 ) 2 =1. C 1 , C 2 Randomly select the generated key from {0,1} (a 1 ,b 1 ) and (a 2 ,b 2 ),Such as figure 1 Shown, C 1 , C 2 Encrypt the quantum state with X and Z operations respectively, and get After encryption is complete, C 1 Will send to C 2 , C 2 Will |φ> enc send C 1 .

[0044] (ii): C 1 , C 2 After receiving the quantum states sent by the other party, C 1 with the key (a 1 ,b 1 ) to |φ> enc Encrypt again to get:

[0045]

[0046] at the same time 2 Also with key (a 2 ,b 2 )right Encrypt to get:

...

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Abstract

The invention proposes a two-client quantum entrusted joint computing method based on entrusted computing mode. In the method, the two clients first double-encrypt the data, and entrust the encrypted data to the remote quantum center for quantum joint calculation, and finally the two clients complete the correct decryption of the calculation results under the premise of ensuring the privacy of the input data of both parties. The invention solves the problem that the original quantum entrusted computing model cannot support multi-client entrusted joint computing, and has better security, that is, neither the external eavesdropper nor the quantum center can know the private information of the client, and each client cannot obtain the other party private information.

Description

technical field [0001] The invention belongs to the field of blind quantum computing, which is to entrust the remote quantum center to perform quantum joint computing after encrypting the data of two clients, and ensure that the client can decrypt and obtain the original text computing results. Background technique [0002] Delegating Quantum private Computing (DQC for short) is a new general-purpose quantum computing model proposed by Broadbent et al. Its basic idea is that participants encrypt the quantum state through X and Z operations, and then entrust the quantum center (quantum center) , referred to as QC) to perform a certain quantum operation (quantum computing) on ​​the encrypted quantum state, and finally the client decrypts the quantum state after the operation to obtain the calculation result. It combines the concepts of quantum cryptography and quantum computing, enabling participants with limited or no quantum capabilities to achieve quantum computing with the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/14H04L9/08H04L29/06H04L29/08
CPCH04L9/0852H04L9/0855H04L9/14H04L63/0478H04L67/10
Inventor 刘文杰陈振宇
Owner NANJING UNIV OF INFORMATION SCI & TECH
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