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Open AccessArticle

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

1
Institute of Cybersecurity and Cryptology, School of Computing and Information Technology, University of Wollongong, Northfields Avenue, Wollongong, NSW 2500, Australia
2
Faculty of Information and Communication Technology, Hong Duc University, 565 Quang Trung, Thanh Hoa, Vietnam
*
Author to whom correspondence should be addressed.
Information 2020, 11(5), 260; https://doi.org/10.3390/info11050260
Received: 8 April 2020 / Revised: 6 May 2020 / Accepted: 8 May 2020 / Published: 11 May 2020
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. View Full-Text
Keywords: digital signature; signer privacy preserving; group signature; strong designated verifier signature digital signature; signer privacy preserving; group signature; strong designated verifier signature
MDPI and ACS Style

Duong, D.H.; Susilo, W.; Trinh, V.C. A New Approach to Keep the Privacy Information of the Signer in a Digital Signature Scheme. Information 2020, 11, 260.

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