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Cluster state-based dynamic quantum agent blind signature method

A technology of proxy signature and proxy blindness, which is applied in key distribution, can solve the problems that the signature cannot be successful, and the dynamic attributes of the proxy signer are not considered.

Active Publication Date: 2019-09-13
易迅通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dynamic quantum proxy blind signature method based on the cluster state to solve the problem that the signature cannot be successful due to the fact that the dynamic attributes of the proxy signer are not considered in the quantum proxy blind signature method

Method used

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  • Cluster state-based dynamic quantum agent blind signature method
  • Cluster state-based dynamic quantum agent blind signature method
  • Cluster state-based dynamic quantum agent blind signature method

Examples

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Embodiment 1

[0072] In this embodiment, a cluster state-based dynamic quantum agent blind signature method is disclosed. The method includes five communication parties, namely Alice, the message owner who holds the information to be signed, Bob, the initial signer who cannot sign normally, Proxy signer Bob1, proxy signer Bob2, and trusted receiver Charlie, where the message owner Alice stores the key k A , four-particle GHZ state subsequence S A and the four-particle cluster state subsequence S' A , the initial signer Bob stores the key k B and the four-particle GHZ state subsequence S B , the proxy signer Bob1 stores the key Four-particle GHZ state subsequence S B1 and the four-particle cluster state subsequence S" B1 , the proxy signer Bob2 stores the key Four-particle GHZ state subsequence S B2 and the four-particle cluster state subsequence S" B2 , the trusted receiver Charlie stores the key k A , key k B , key key and the four-particle cluster state subsequence S' C . ...

Embodiment 2

[0186] The method in this embodiment is used to add the proxy signer in the first embodiment. In the case of only one proxy signer in the first embodiment, a second proxy signer, David, is added.

[0187] Before the start of this method, there are 4 communicating parties, namely, the message owner Alice who holds the information to be signed, the initial signer Bob who cannot sign normally, the proxy signer Bob2, and the trusted receiver Charlie, in which the message owner Alice stores with key k A , four-particle GHZ state subsequence S A and the four-particle cluster state subsequence The initial signer Bob stores the key k B and the four-particle GHZ state subsequence S B , the proxy signer Bob2 stores the key Four-particle GHZ state subsequence S B2 and the four-particle cluster state subsequence The trusted receiver Charlie stores the key k A , key k B , key key and the four-particle cluster state subsequence This method is used to perform quantum proxy b...

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Abstract

The invention discloses a cluster state-based dynamic quantum agent blind signature method. The dynamic attribute of the proxy signature is realized by using the GHZ state and the measurement attribute of the controlled NOT gate. Once a new proxy signer attempts to join the proxy group or a currently authorized proxy signer leaves the group, other communication participants only need to update their respective keys to realize the next round of signature, and ensure that the signature is successful in the case that the proxy signer is adjusted.

Description

technical field [0001] The invention relates to the field of quantum secure communication, in particular to a cluster state-based dynamic quantum agent blind signature method. Background technique [0002] Compared with handwritten signatures, digital signatures are also a secure signature method. Classical digital signatures are widely used in many fields such as e-government, e-commerce, and electronic communications. However, the security of digital signature schemes based on classical ciphers mostly depends on Due to the computational complexity of some mathematical problems, the existing technology also provides a quantum signature method. The quantum signature method can effectively overcome and solve some security problems of classical digital signatures. Among them, the quantum proxy blind signature is more secure in the quantum signature method. A signature method, quantum proxy blind signature refers to the combination of proxy signature and blind signature, which ...

Claims

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Application Information

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IPC IPC(8): H04L9/32H04L9/08
CPCH04L9/0852H04L9/3257H04L2209/72
Inventor 张明慧王家耀岳林阳
Owner 易迅通科技有限公司
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