scholarly journals A New Approach to Keep the Privacy Information of the Signer in a Digital Signature Scheme

Information ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 260
Author(s):  
Dung Hoang Duong ◽  
Willy Susilo ◽  
Viet Cuong Trinh
Keyword(s):  
Digital Signature ◽  
Group Signature ◽  
Encryption Scheme ◽  
Signature Scheme ◽  
Secret Key ◽  
New Approach ◽  
Designated Verifier ◽  
Designated Verifier Signature ◽  
Digital Signature Scheme ◽  
Responsible Person

In modern applications, such as Electronic Voting, e-Health, e-Cash, there is a need that the validity of a signature should be verified by only one responsible person. This is opposite to the traditional digital signature scheme where anybody can verify a signature. There have been several solutions for this problem, the first one is we combine a signature scheme with an encryption scheme; the second one is to use the group signature; and the last one is to use the strong designated verifier signature scheme with the undeniable property. In this paper, we extend the traditional digital signature scheme to propose a new solution for the aforementioned problem. Our extension is in the sense that only a designated verifier (responsible person) can verify a signer’s signature, and if necessary (in case the signer refuses to admit his/her signature) the designated verifier without revealing his/her secret key is able to prove to anybody that the signer has actually generated the signature. The comparison between our proposed solution and the three existing solutions shows that our proposed solution is the best one in terms of both security and efficiency.

scholarly journals A Digital Signature Scheme Based onMST3Cryptosystems

2014 ◽  
Vol 2014 ◽  
pp. 1-11
Author(s):  
Haibo Hong ◽  
Jing Li ◽  
Licheng Wang ◽  
Yixian Yang ◽  
Xinxin Niu
Keyword(s):  
Digital Signature ◽  
Encryption Scheme ◽  
Signature Scheme ◽  
Secret Key ◽  
Signature Schemes ◽  
Logarithmic Signatures ◽  
Public Key Cryptosystems ◽  
Cryptographic Keys ◽  
Main Components ◽  
Digital Signature Scheme

As special types of factorization of finite groups, logarithmic signature and cover have been used as the main components of cryptographic keys for secret key cryptosystems such asPGMand public key cryptosystems likeMST1,MST2, andMST3. Recently, Svaba et. al proposed a revisedMST3encryption scheme with greater security. Meanwhile, they put forward an idea of constructing signature schemes on the basis of logarithmic signatures and random covers. In this paper, we firstly design a secure digital signature scheme based on logarithmic signatures and random covers. In order to complete the task, we devise a new encryption scheme based onMST3cryptosystems.

Secure and efficient quantum designated verifier signature scheme

2020 ◽  
Vol 35 (18) ◽  
pp. 2050148
Author(s):  
Yue Zhang ◽  
Xiangjun Xin ◽  
Fagen Li
Keyword(s):  
Quantum State ◽  
Digital Signature ◽  
Quantum Signature ◽  
Economic Interest ◽  
Signature Scheme ◽  
Forgery Attack ◽  
Private Key ◽  
Designated Verifier ◽  
Designated Verifier Signature ◽  
One Way Function

A digital signature with designated verifier (SWDV) makes that only the designated verifier can verify its validity. It can be used to protect the privacy and economic interest of the signer. So, the SWDV schemes have many applications in e-voting, auction and some other fields. To make the SWDV secure against the quantum forger, a quantum signature with designated verifier signature (QSWDV) scheme is proposed. Our QSWDV is robust due to its strong security against forgery attack, inter-resending attacks, impersonation attacks and Trojan horse attacks. Its properties such as non-transferability and hiding source can be guaranteed by the signature simulation of the designated verifier. What is more, our scheme can be proved to be information-theoretically secure, which can guarantee the secrecy of the signer’s private key and the unforgeability of the QSWDV. In the proposed QSWDV scheme, the partners neither need use quantum one-way function nor need perform quantum state comparisons, which can reduce the complexity and improve the efficiency the QSWDV scheme.

scholarly journals An approach for Embedding Elliptic Curve in Fractal Based Digital Signature Scheme

2010 ◽  
Vol 3 (1) ◽  
pp. 75
Author(s):  
D. B. Ojha ◽  
Ms. Shree ◽  
A. Dwivedi ◽  
A. Mishra
Keyword(s):  
Elliptic Curve ◽  
Digital Signature ◽  
Elliptic Curve Cryptography ◽  
Signature Scheme ◽  
New Approach ◽  
Fractal Sets ◽  
Digital Signature Scheme

We established a new approach for cryptographic digital signature scheme based on Mandelbrot and Julia fractal sets. We have embedded the features of ECC (elliptic curve cryptography) to the digital signature scheme based on Mandelbrot and Julia fractal sets. We offered a digital signature that has advantages of both the fractal based digital signature as well as of elliptic curve digital signature.Keywords: Fractal; ECC; Digital signature.© 2011 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi:10.3329/jsr.v3i1.4694                 J. Sci. Res. 3 (1), 75-79 (2011)

scholarly journals A signature scheme from the finite field isomorphism problem

2020 ◽  
Vol 14 (1) ◽  
pp. 39-54
Author(s):  
Jeffrey Hoffstein ◽  
Joseph H. Silverman ◽  
William Whyte ◽  
Zhenfei Zhang
Keyword(s):  
Finite Field ◽  
Digital Signature ◽  
Homomorphic Encryption ◽  
Isomorphism Problem ◽  
Encryption Scheme ◽  
Hard Problem ◽  
Signature Scheme ◽  
Fully Homomorphic Encryption ◽  
Digital Signature Scheme

AbstractIn a recent paper the authors and their collaborators proposed a new hard problem, called the finite field isomorphism problem, and they used it to construct a fully homomorphic encryption scheme. In this paper, we investigate how one might build a digital signature scheme from this new problem. Intuitively, the hidden field isomorphism allows us to convert short vectors in the underlying lattice of one field into generic looking vectors in an isomorphic field.

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