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.
CN111865599AActive Publication Date: 2020-10-30NANJING UNIV OF POSTS & TELECOMM
3 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF POSTS & TELECOMM
Publication Date
2020-10-30

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More