scholarly journals Research on a New Signature Scheme on Blockchain

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Chao Yuan ◽  
Mi-xue Xu ◽  
Xue-ming Si
Keyword(s):  
Digital Signature ◽  
Discrete Logarithm ◽  
Signature Scheme ◽  
Bilinear Maps ◽  
The Core ◽  
Aggregate Signature ◽  
Core Technology ◽  
Security Properties ◽  
And Performance ◽  
Inputs And Outputs

With the rise of Bitcoin, blockchain which is the core technology of Bitcoin has received increasing attention. Privacy preserving and performance on blockchain are two research points in academia and business, but there are still some unresolved issues in both respects. An aggregate signature scheme is a digital signature that supports making signatures on many different messages generated by many different users. Using aggregate signature, the size of the signature could be shortened by compressing multiple signatures into a single signature. In this paper, a new signature scheme for transactions on blockchain based on the aggregate signature was proposed. It was worth noting that elliptic curve discrete logarithm problem and bilinear maps played major roles in our signature scheme. And the security properties of our signature scheme were proved. In our signature scheme, the amount will be hidden especially in the transactions which contain multiple inputs and outputs. Additionally, the size of the signature on transaction is constant regardless of the number of inputs and outputs that the transaction contains, which can improve the performance of signature. Finally, we gave an application scenario for our signature scheme which aims to achieve the transactions of big data on blockchain.

scholarly journals Digital signature scheme on the 2 x 2 matrix algebra

2021 ◽  
Vol 17 (3) ◽  
pp. 254-261
Author(s):  
Nikolay A. Moldovyan ◽  
◽  
Alexandr A. Moldovyan ◽  
Keyword(s):  
Digital Signature ◽  
High Performance ◽  
Matrix Algebra ◽  
Multiplicative Group ◽  
Discrete Logarithm ◽  
Signature Scheme ◽  
The Public ◽  
Signature Generation ◽  
Commutative Subalgebras ◽  
Digital Signature Scheme

The article considers the structure of the 2x2 matrix algebra set over a ground finite field GF(p). It is shown that this algebra contains three types of commutative subalgebras of order p2, which differ in the value of the order of their multiplicative group. Formulas describing the number of subalgebras of every type are derived. A new post-quantum digital signature scheme is introduced based on a novel form of the hidden discrete logarithm problem. The scheme is characterized in using scalar multiplication as an additional operation masking the hidden cyclic group in which the basic exponentiation operation is performed when generating the public key. The advantage of the developed signature scheme is the comparatively high performance of the signature generation and verification algorithms as well as the possibility to implement a blind signature protocol on its base.

Về một giải pháp nâng cao độ an toàn cho lược đồ chữ ký số trong vành hữu hạn Zn

2020 ◽  
Vol 8 (2) ◽  
pp. 1-9
Author(s):  
Nguyễn Đào Trường ◽  
Lê Văn Tuấn
Keyword(s):  
Digital Signature ◽  
Discrete Logarithm ◽  
Finite Ring ◽  
Signature Scheme ◽  
Mandatory Requirement ◽  
Digital Signature Scheme

Tóm tắt— Chữ ký số ngày càng được sử dụng rộng rãi và là yêu cầu bắt buộc đối với rất nhiều nền tảng an toàn. Bài báo đề xuất một giải pháp nâng cao độ an toàn cho lược đồ chữ ký số dựa trên bài toán logarit rời rạc trên vành hữu hạn Zn.Abstract— The digital signature is increasingly widely used, and it is the mandatory requirement for many security platforms. The paper proposes a solution to improve the security of digital signature scheme based on the problem of discrete logarithm on finite ring Zn.

scholarly journals The Cracking of WalnutDSA: A Survey

Symmetry ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1072
Author(s):  
José Ignacio Escribano Pablos ◽  
María Isabel González Vasco ◽  
Misael Enrique Marriaga ◽  
Ángel Luis Pérez del Pozo
Keyword(s):  
Braid Group ◽  
Digital Signature ◽  
Design Principles ◽  
Signature Scheme ◽  
Digital Signature Algorithm ◽  
Finite Set ◽  
Security Properties ◽  
Theoretical Construction

This paper reports on the Walnut Digital Signature Algorithm (WalnutDSA), which is an asymmetric signature scheme recently presented for standardization at the NIST call for post-quantum cryptographic constructions. WalnutDSA is a group theoretical construction, the security of which relies on the hardness of certain problems related to an action of a braid group on a finite set. In spite of originally resisting the typical attacks succeeding against this kind of construction, soon different loopholes were identified rendering the proposal insecure (and finally, resulting in it being excluded from Round 2 of the NIST competition). Some of these attacks are related to the well-structured and symmetric masking of certain secret elements during the signing process. We explain the design principles behind this proposal and survey the main attack strategies that have succeeded, contradicting its claimed security properties, as well as the recently-proposed ideas aimed at overcoming these issues.

Simulation and Redesign of Industrial High-Speed Sewing Machine Based on Performance-Driven

2011 ◽  
Vol 299-300 ◽  
pp. 895-898
Author(s):  
Jun Hua Che ◽  
Qian Zeng ◽  
Zhen Qiang Sun ◽  
Ping Zhang Wang
Keyword(s):  
Intellectual Property ◽  
High Speed ◽  
Developed Country ◽  
Sewing Machine ◽  
The Public ◽  
The Core ◽  
Core Technology ◽  
And Performance ◽  
The Way

High-speed sewing performance which determines the performance and quality is the core technology of the industrial high-speed sewing machine. Such studies for sewing performance which are the core technology and own the intellectual property in the enterprise have been researched in the developed country. And fewer articles can be seen in the public materials. In this paper, the quality and performance of the ZJ9700MF-RS have been greatly improved by the way of simulation and redesign for high-speed sewing machine.

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