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Proxy signature scheme

Author: ZhangYongGang
Tutor: XuQiuLiang
School: Shandong University
Course: Computer Software and Theory
Keywords: Proxy signature Authentication Security Agreement Program
CLC: TP309
Type: Master's thesis
Year: 2005
Downloads: 83
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Abstract

This paper studies the proxy signature issues. Proxy signature is a special digital signature, the original signer own signature or the signature of the right to entrust to the proxy signer to complete the signature by the proxy signer to sign on behalf of the original signers of the document specified. The biggest difference is that with the digital signature to increase the proxy signer intermediate links between the original signature and the signature of the recipient. In the real world, proxy signature is a common practice activities, its various manifestations, has widespread applications. For example, the company owner commissioned employees completed the signature of the contract on behalf of themselves or the company, commissioned by Secretary of the administrative leadership of the documents for approval, the bank depositors agent bank trading business, customer commissioned commodity brokers procurement of goods, these are proxy signature in day-to-day work in the specific application. Agent signing process, an important fact that needs to be done between the original signer and the proxy signer commissioned signature right. A commissioned and commissioned relationship between the original signer and the proxy signer, proxy signature under the authorization of the original signers of the document specified exercise signature rights, not to deny their own behavior, and also can not arbitrarily forgery, abuse the commissioned signature rights, in order to achieve some personal goal. Proxy signer's signature acts should fully reflect the will of the original signers. Similarly, the original signer can not be authorized behavior repudiation abuse commissioned signature rights to satisfy some personal goal and responsibility borne by the proxy signer signature. Both's behavior can not be denied. Traditional proxy signature study, both the original signer and the proxy signer status fairness problem has been discussed as a priority issue, have been proposed many anti-repudiation of proxy signature scheme to solve them. Admittedly, the original signer and the proxy signer relationship is the proxy signature activity is the most important relationship problem, but we should see, In proxy signature activities, in addition to the between the original signer and the proxy signer dependencies outside original signer, proxy signature and the signature recipient also exists among mutual relations, they are proxy signature elements of the activities, together constitute the whole process of the proxy signature, the three are inseparable. The original signer and the proxy signer to complete the process of proxy signature, signature recipient to complete the the received proxy signature verification process, so as to confirm the authenticity of the proxy signature. Except that described above, the original signer and the proxy signer is likely to deny their own behavior, the signature of the recipient is also likely to receive proxy signature denial and repudiation. The signature recipient may refuse to accept the proxy signature, or taking behavior is not conducive to the signer. Therefore, the study of the original signer,

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