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Single decoy state quantum digital signature method

A decoy state quantum and digital signature technology, applied in digital transmission systems, secure communication devices, electromagnetic wave transmission systems, etc.

Active Publication Date: 2020-10-30
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But experimentally challenging because the original protocol requires long-term quantum storage

Method used

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  • Single decoy state quantum digital signature method
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  • Single decoy state quantum digital signature method

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Embodiment Construction

[0014] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the examples, which are only used to explain the present invention, and do not constitute a limitation to the protection scope of the present invention. like Figure 1-2 As shown, the present embodiment provides a single decoy state quantum digital signature method, the method includes three participants: a signer Alice and two signature accepting objects Bob and Charlie, the method includes two stages: distribution phase and message phase, the specific methods are as follows:

[0015] In the distribution phase, the key generation protocol is executed by Bob-Alice and Charlie-Alice respectively to generate key strings; for the information m∈{0,1} that needs to be signed, Bob or Charlie randomly selects a bit b∈{0, 1}, base Intensity λ∈{μ,ν} to prepare N t quantum states and send them to Alice; Alice randomly chooses the basis To ...

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Abstract

The present invention provides a single decoy state quantum digital signature method provided. In a key distribution stage, efficient parameter estimation and quantum digital signature can be carriedout only by modulating the light source intensity into two intensities, namely a signal state and a decoy state. According to the method, the requirement for preparing the vacuum state in a traditional multi-intensity decoy state quantum digital signature scheme is avoided, the difficulty of experiment implementation is lowered, and meanwhile consumption of random numbers is reduced. According tothe invention, a low-loss unequal-arm Mach-Zehnder interferometer and a real-time polarization compensation method are used to realize efficient key transmission and signature. The system provided bythe invention is simple to implement and stable in operation, and successfully realizes higher signature rate and farther transmission distance on the premise of meeting the safety requirements of non-repudiation, unforgeability and transferability of a quantum digital signature protocol compared with the previous work.

Description

technical field [0001] The invention relates to the technical field of quantum digital signatures in quantum communication, in particular to a single decoy state quantum digital signature method. Background technique [0002] Digital signatures play an important role in many scenarios, such as software distribution, e-commerce and financial transactions, all of which need to ensure the authenticity and integrity of information. Currently widely used digital signature schemes generally use public key encryption, which is considered safe due to the complexity of one-way mathematical functions and limited computing resources. However, with major breakthroughs in algorithms and the rapid development of quantum computers, this view is untenable. In order to get rid of this predicament, according to the basic principles of quantum mechanics, the Quantum Digital Signature (Quantum Digital Signature, QDS) first proposed by Gottesman and Chuang can guarantee information security. B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/08H04B10/61H04B10/69
CPCH04L9/3247H04L9/0852H04L9/0869H04B10/6162H04B10/6165H04B10/691
Inventor 王琴陈静静丁华建张春梅
Owner NANJING UNIV OF POSTS & TELECOMM
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