A New Proxy Blind Signature Scheme based on ECDLP

The ISC International Journal of Information Security, 2021

In recent years, due to their potential applications, proxy blind signatures became an active research topic and are an extension of the basic proxy signature. A proxy blind signature scheme enables a proxy signer to produce a blind signature on behalf of an original signer. Such schemes are useful in many practical applications such as e-commerce, e-voting, e-tendering systems. Many proxy blind signature schemes have been proposed in the literature. In order to improve the efficiency and to adopt resource constrained devices, in this paper, we propose a pairing free ID-based proxy blind signature scheme with message recovery. The proposed scheme is proven secure against the random oracle model under the hardness assumption of the elliptic curve discrete logarithm problem. We compare our scheme with the other proxy blind signature schemes. The efficiency analysis shows that our scheme is more efficient in terms of computational and communicational point of view. Also due to the message recovery property, our scheme can be deployed easily in low band width devices. https://www.isecure-journal.com/article_115537.html

Ijca Proceedings on International Conference on Emergent Trends in Computing and Communication, 2014

Internet has become an Integral part and prime need of every human being in their day to day life. People now prefer to do transaction over the internet than doing it offline as it reduces time consumption. In such scenarios, securing customer data is one of the biggest challenges for software developers. For this reason Security protocols like Blind Signature Scheme came into picture where requester is allowed obtain a signature from the signer who signs a message without reading the content of the message, and cannot link the protocol with the resulting message signature pair. Blind Signature scheme is mostly used for E-commerce applications like Digital payment system, Electronic-voting system as it provides security goals like blindness, untraceability, correctness and nonforgeability. Neal Koblitz and Victor S. Miller has presented Elliptic curve cryptography (ECC) which is an approach to public key cryptography based on algebraic structure of elliptic curves in over finite fields. Elliptic curve cryptosystem is more efficient than other public key cryptosystem due to difficulty in solving elliptic curve discrete logarithm problem. Using the benefits of elliptic curve cryptography we have presented implementation of blind signature scheme using JAVA.

2021

Blind signatures provide authenticity, integrity, nonrepudiation, blindness and untraceability of the message contents. In blind signature, the signer signs the message without revealing the contents of a message. Certificateless blind signature scheme is the combination of certificateless scheme and blind signature scheme. In certificateless blind signature scheme there is no need of certificates to verify the authenticity of the public key of user. In this research, the “Certificatrless blind signature scheme using ECC” of Nayak et al is analyzed. The analysis shows that the proposed certificateless blind signature scheme is not secure against the known cryptanalysis attacks. In fact, an attacker can easily reveal the secret key of the signer by mounting a forgery attack and can become a fake signer. After a successful cryptanalysis, a modified version of the scheme is presented. In the modified version of the scheme, the elliptic curve encryption and decryption is introduced in t...

International Journal of Electrical and Computer Engineering (IJECE), 2018

In various types of electronic transactions, including election systems and digital cash schemes, user anonymity and authentication are always required. Blind signatures are considered the most important solutions to meeting these requirements. Many studies have focused on blind signature schemes; however, most of the studied schemes are single blind signature schemes. Although blind multi-signature schemes are available, few studies have focused on these schemes. In this article, blind multi-signature schemes are proposed based on the Elliptic Curve Discrete Logarithm Problem (ECDLP). The proposed schemes are based on the GOST R34.10-2012 digital signature standard and the EC-Schnorr digital signature scheme, and they satisfy blind multi-signature security requirements and have better computational performance than previously proposed schemes. The proposed schemes can be applied in election systems and digital cash schemes. Keyword: Blind signature EC-Schnorr signature GOST R34.10-2012 standard Multi-signature scheme Random oracle model (ROM) 1. INTRODUCTION David Chaum first proposed the idea of blind signatures based on the RSA signature scheme in 1983 [1]. Subsequently, a number of research studies on blind signatures was completed to protect the anonymity of users and prevent fake online transactions. In recent decades, elliptic curves have emerged as important factors in digital and crypto theory. The security level of cryptography systems is based on elliptic curve cryptography (ECC) and the difficulty of elliptic curve discrete logarithm problems (ECDLPs). The advantages of ECC cryptosystems compared with other public-key cryptography systems is that ECC ciphers provide security attributes comparable to traditional public-key cryptography systems despite their smaller key lengths. Reports have estimated that the 3248-bit length in the RSA cryptosystem has the same security level as the 256-bit length of the ECC cryptosystem. Thus, the installation of ECC consumes less system resources and energy and provides a higher level of security. Because of the advantage of small key length, ECC has been widely applied in many fields. Digital signatures based on the difficulty of ECDLPs were first introduced in 1991 in the independent research of NealsKoblitz [2]. Since the 2000s, the USA, Russia, Japan, Korea and several European countries have investigated these problems and have developed standard system solutions, such as the standards by ISO, ANSI, IEEE, SECG, and FIPS. ECDLP is the predominant cryptosystem in Russia. In 2001, Russia produced the GOST R34.10-2001 digital signature standard based on ECDLP with a 256-bit key length. The newest Russia version of the digital signature is GOST R34.10-2012 [3], which has a key length between 256 bits and 512 bits.

2016

Proxy blind multi-signature, it combines the properties of proxy-signature, blind signature and multi-signature,which has been applied in different application.In this paper, we showed a new proxy to proxy blind multi-signature based on difficulty of solving the discrete logarithm problem (DLP) which fulfill the absence of single proxy signer in Dongre’s[9] scheme by delegating his signing capabilities to a designated proxy signer. Moreover, we are taking this existing scheme into a new level or in next grade in order to sign the document on behalf of group of original signers.