本文選題：代理簽名 + 盲簽名　； 參考：《陜西師范大學》2008年碩士論文

【摘要】： 數(shù)字簽名是密碼學中重要的組成部分,是信息完整性、真實性的理論基礎(chǔ),隨著計算機網(wǎng)絡(luò)的不斷發(fā)展,普通的數(shù)字簽名已不能滿足人們的需要,許多有著特殊用途的數(shù)字簽名方案被提了出來,如盲簽名、代理簽名、代理盲簽名等。 1983年Chaum提出了盲簽名方案,盲簽名是指簽名者在簽名前后都不知道簽名消息的具體內(nèi)容,它對待簽名消息具有保護功能。1996年,Mambo等人提出了代理簽名方案,代理簽名是指一個被指定的代理簽名者可以代表原始簽名者生成有效的簽名,它可以保證在原始簽名者不在或不方便做出簽名時也能生成有效的簽名。2002年,譚作文等人提出了代理盲簽名方案,代理盲簽名既具有代理簽名的特性又具有盲簽名的特性。代理盲簽名作為新型的簽名技術(shù)已在電子支付系統(tǒng)、移動代理系統(tǒng)、電子投票、電子拍賣、電子商務(wù)和網(wǎng)絡(luò)安全等方面有廣泛的應(yīng)用前景。 本文在分析原有代理簽名和盲簽名的基礎(chǔ)上,對代理盲簽名及其應(yīng)用進行研究,并針對代理盲簽名在電子現(xiàn)金中的應(yīng)用,提出了相應(yīng)的解決方案。 本文所取得的主要研究成果如下: 1.對譚作文等代理盲簽名方案的安全性進行了分析。分析表明,該方案雖然滿足一些代理盲簽名的基本性質(zhì),但仍存在一些安全缺陷。如:原始簽名人的偽造攻擊、偽造代理盲簽名、更改原始簽名人或代理簽名人、不具有不可追蹤性。針對這些安全缺陷,我們提出了一個改進的方案。 2.基于Okamoto-Schnorr盲簽名方案構(gòu)造了一個新的代理盲簽名方案。新方案具有代理簽名的權(quán)力委托和盲簽名的匿名性與不可追蹤性的特點,代理密鑰的傳輸不需要使用安全的秘密通道,可在公共信道上進行。 3.結(jié)合代理簽名與盲簽名的優(yōu)點,利用橢圓曲線上的Weil雙線性映射,提出了一個新的基于身份的代理盲簽名方案。該方案利用以用戶的身份為基礎(chǔ)的公鑰代替了以數(shù)字證書為基礎(chǔ)的公鑰,節(jié)約了驗證簽名的時間開銷,減少了交互的次數(shù)并節(jié)省了存儲空間。 4.基于代理多重簽名與盲簽名,提出了一個新的基于身份的代理多重盲簽名,即一個代理簽名人能夠代表多個原始簽名人進行代理盲簽名。它綜合了多重代理簽名和盲簽名的優(yōu)點,能夠有效的防止授權(quán)人冒充多重代理人對消息進行簽名。 5.將新的代理盲簽名方案具體的應(yīng)用于電子現(xiàn)金中,提出了新的電子現(xiàn)金方案,指出了新的代理盲簽名方案具有良好的現(xiàn)實應(yīng)用價值。
[Abstract]:Digital signature is an important part of cryptography, it is the theoretical basis of information integrity and authenticity. With the development of computer network, ordinary digital signature can no longer meet the needs of people. Many special purpose digital signature schemes have been proposed, such as blind signature, proxy signature, proxy blind signature and so on. Chaum proposed a blind signature scheme in 1983. Blind signature means that the signer does not know the specific contents of the signature message before and after signing, and it has the function of protecting the signature message. In 1996, Chaum et al put forward a proxy signature scheme. Proxy signature means that a designated proxy signer can generate a valid signature on behalf of the original signer, which can guarantee the generation of a valid signature when the original signer is absent or inconvenient. Tan proposed a proxy blind signature scheme. Proxy blind signature has both the characteristics of proxy signature and blind signature. As a new signature technology, proxy blind signature has been widely used in electronic payment system, mobile agent system, electronic voting, electronic auction, electronic commerce and network security. Based on the analysis of the original proxy signature and blind signature, this paper studies the proxy blind signature and its applications, and proposes a corresponding solution to the application of proxy blind signature in electronic cash. The main research results obtained in this paper are as follows: 1. The security of proxy blind signature schemes such as Tan composition is analyzed. The analysis shows that although the scheme satisfies the basic properties of some proxy blind signatures, it still has some security defects. For example: forgery attack by original signer, forgery of proxy blind signature, modification of original signer or proxy signer, it is not traceable. In view of these safety defects, we propose an improved scheme. 2. A new proxy blind signature scheme based on Okamoto-Schnorr blind signature scheme is proposed. The new scheme is characterized by the anonymity and non-traceability of proxy signature power delegation and blind signature. The transmission of proxy key does not need to use a secure secret channel and can be carried out on a common channel. 3. Combining the advantages of proxy signature and blind signature, a new identity-based proxy blind signature scheme is proposed by using Weil bilinear mapping on elliptic curves. The scheme uses the public key based on the user's identity to replace the public key based on the digital certificate, saves the time cost of verifying the signature, reduces the number of interactions and saves the storage space. 4. Based on proxy multi-signature and blind signature, a new identity-based proxy multi-blind signature is proposed, in which a proxy signer can perform proxy blind signature on behalf of multiple original signers. It combines the advantages of multi-proxy signature and blind signature, and can effectively prevent the licensor from impersonating multiple agents to sign messages. 5. The new proxy blind signature scheme is applied to electronic cash, and a new proxy blind signature scheme is proposed. It is pointed out that the new proxy blind signature scheme has good practical value.
【學位授予單位】：陜西師范大學
【學位級別】：碩士
【學位授予年份】：2008
【分類號】：TN918.1

【引證文獻】

相關(guān)博士學位論文 前1條

1 李鳳英;代理簽名技術(shù)在遠程教育中的應(yīng)用模型及實現(xiàn)研究[D];華東師范大學;2011年

相關(guān)碩士學位論文 前1條

1 許倩;代理盲簽名理論及其在電子現(xiàn)金系統(tǒng)中的研究與應(yīng)用[D];華南理工大學;2010年

，

本文編號：1810575