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The theory and application of the concurrent signature

Author: GaoShengZuo
Tutor: ZhangJianHong
School: North China University of
Course: Applied Mathematics
Keywords: Fair exchange Concurrent signature Fairness Identity-based Self-certified
CLC: TN918.1
Type: Master's thesis
Year: 2011
Downloads: 29
Quote: 0
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Abstract


The rapid development of e-commerce, making the electronic trading business is growing into an unprecedented breadth and depth of daily life, however, the Internet itself is inherently unsafe, to safeguard the fairness in the transaction process with new challenges. The so-called fairness, refers to the participants of the transaction can not be used improper means to reap more benefits than others. As one of the important issues in cryptography, digital signature fair exchange refers to each other do not trust a trader to a fair exchange on the network own digital signature. Fairness to ensure the completion of the transaction, the two sides are able to get each other's signature, or the two sides get nothing. In recent years, the problem of fair exchange of digital signatures is more and more scholars of all ages password. Concurrent signature (Concurrent Signatures) concept was first proposed by Chen, Kulda and Paterson et al, it is designed to provide a more feasible solution to fair exchange digital signature to each other. Concurrent signature has the good characteristics unmatched by other signature scheme, so that it has a broad application prospects in the fair exchange of digital signatures and e-commerce. Concurrent signature distrust on the Internet communication, the two sides provides a more than ever fair and efficient exchange of digital signatures. At home and abroad concurrent signature is very active. In this paper, we first give Machan clubs an optimistic fair exchange protocol attacks, and Machan Club and other program improvements, improved scheme in terms of security has been improved. Secondly, the analysis of a variety of concurrent signature scheme for concurrent signature scheme's right to exist by the parties to the transaction is not fair, based on the Schnorr signature scheme and segmentation techniques construct a realization of the initiator of the signature with the signature response between strong fair concurrent signature scheme, the security analysis prove that our program is fair and safe and reliable. In addition, because the ring signature has the anonymity signer for his signature could not be verified, so the paper-based ring signature construct a secure identity-based concurrent signature scheme, the concurrent signature can be self-certified .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Confidentiality of communications and communications security > Theory
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