scholarly journals Key-Insulated Undetachable Digital Signature Scheme and Solution for Secure Mobile Agents in Electronic Commerce

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
Yang Shi ◽  
Jie Lin ◽  
Guoyue Xiong ◽  
Xiaoping Wang ◽  
Hongfei Fan
Keyword(s):  
Electronic Commerce ◽  
Digital Signature ◽  
Mobile Agents ◽  
Theoretical Perspective ◽  
Performance Testing ◽  
Digital Signatures ◽  
Diffie Hellman ◽  
Time Period ◽  
Digital Signature Scheme ◽  
Security Notion

Considering the security of both the customers’ hosts and the eShops’ servers, we introduce the idea of a key-insulated undetachable digital signature, enabling mobile agents to generate undetachable digital signatures on remote hosts with the key-insulated property of the original signer’s signing key. From the theoretical perspective, we provide the formal definition and security notion of a key-insulated undetachable digital signature. From the practical perspective, we propose a concrete scheme to secure mobile agents in electronic commerce. The scheme is mainly focused on protecting the signing key from leakage and preventing the misuse of the signature algorithm on malicious servers. Agents do not carry the signing key when they generate digital signatures on behalf of the original signer, so the key is protected on remote servers. Furthermore, if a hacker gains the signing key of the original signer, the hacker is still unable to forge a signature for any time period other than the key being accessed. In addition, the encrypted function is combined with the original signer’s requirement to prevent the misuse of signing algorithm. The scheme is constructed on gap Diffie–Hellman groups with provable security, and the performance testing indicates that the scheme is efficient.

Identity-based undetachable digital signature for mobile agents in electronic commerce

2018 ◽  
Vol 22 (20) ◽  
pp. 6921-6935 ◽  
Author(s):  
Yang Shi ◽  
Jingxuan Han ◽  
Jiangfeng Li ◽  
Guoyue Xiong ◽  
Qinpei Zhao
Keyword(s):  
Electronic Commerce ◽  
Digital Signature ◽  
Mobile Agents ◽  
Identity Based

scholarly journals Time of signing in the Estonian digital signature scheme

2019 ◽  
pp. 40-50
Author(s):  
Tõnu Mets ◽  
Arnis Parsovs
Keyword(s):  
European Union ◽  
Digital Signature ◽  
Digital Signatures ◽  
Signature Scheme ◽  
Signature Schemes ◽  
Electronic Documents ◽  
Legal Requirement ◽  
The Public ◽  
Digital Signature Scheme ◽  
Legal Consequences

There is a widespread misconception among some lawyers, technologists and the public that the Estonian digital signature scheme provides reliable proof of the time when a document was digitally signed. In this article Tõnu Mets and Arnis Parsovs show that the legal requirement to establish the time of signing is not met in practice. The related legal requirement that the validation of the digital signature should confirm that the certificate was valid at the time of signing is also not met. The authors analyse the legal consequences of this, and discuss possible solutions for the issues that arise. They note that digital signature schemes used in other countries implementing Regulation (EU) No 910/2014 of the European Parliament and the Council of 23 July 2014 (eIDAS) are likely to share the problems discussed in this article. Index words: Estonia, European Union, Digital signatures, Electronic documents

scholarly journals LEGISLATING MARKET WINNERS: DIGITAL SIGNATURE LAWS AND THE ELECTRONIC COMMERCE MARKETPLACE

2017 ◽  
Author(s):  
C. Bradford Biddle
Keyword(s):  
Electronic Commerce ◽  
Digital Signature ◽  
Legal Status ◽  
Digital Signatures ◽  
Public Key Infrastructure ◽  
Public Key ◽  
Legal Regime ◽  
Internet Commerce

The argument goes something like this: Internet commerce is hampered by the authentication problem. There is no reliable way to ensure that the sender of an electronic transmission is in fact who they purport to be. Digital signatures, supported by a “public key infrastructure” of certification authorities (CAs) and certificate databases, can solve this authentication problem. CAs will not emerge under the current legal regime, however, because they face uncertain and potentially immense liability exposure. Additionally, the legal status of digitally signed documents is unclear. Therefore, legislation is needed which defines and limits CA liability and which establishes the legality of digitally signed documents. Such legislation will solve the authentication problem and result in robust Internet commerce.

scholarly journals Certificateless and provably-secure digital signature scheme based on elliptic curve

2019 ◽  
Vol 9 (4) ◽  
pp. 3228
Author(s):  
Dhanashree Toradmalle ◽  
Jayabhaskar Muthukuru ◽  
B Sathyanarayana
Keyword(s):  
Digital Signature ◽  
Digital Signatures ◽  
Vital Role ◽  
Signature Scheme ◽  
Digital Signature Algorithm ◽  
Cryptographic Algorithms ◽  
Constrained Environments ◽  
Digital Signature Scheme ◽  
The Web ◽  
Provably Secure

With the internet today available at the user’s beck, and call data or Information Security plays a vital role. Confidentiality, Integrity, Availability, and Non-repudiation are the pillars of security on which every application on the web is based on. With these basic requirements the users also need the security in low resource constrained environments making it more challenging for the security experts to design secured cryptographic algorithms. Digital Signatures play a pivotal role in Authentication. They help in verifying the integrity of the data being exchanged. Elliptical curves are the strongest contenders in Digital Signatures, and much research is being done to enhance the method in many ways. The paper briefs a secured and improved ECDSA Elliptical Curve Digital Signature Algorithm which is an improved and secured version of the Digital Signature Algorithm.

Digital Signature Schemes

2017 ◽  
Author(s):  
Keith M. Martin
Keyword(s):  
Digital Signature ◽  
Digital Signatures ◽  
Public Key Cryptography ◽  
Detailed Comparison ◽  
Public Key ◽  
Signature Scheme ◽  
Signature Schemes ◽  
Digital Signature Scheme

In this chapter, we discuss digital signature schemes. We start by considering the general requirements of a digital signature scheme. We show first that a digital signature scheme could be established using symmetric techniques. We then consider the more conventional use of public-key cryptography to create digital signature schemes. We compare two different approaches to building a digital signature scheme and illustrate how to manifest these using RSA. We then discuss practical issues concerning digital signature schemes, including different aspects of their security. We close by providing a detailed comparison between digital signatures and handwritten signatures which serves to both illustrate the strengths and vulnerabilities of digital signature schemes.

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