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Dissertations / Theses on the topic 'Proxy signature'

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Published: 4 June 2021

Last updated: 26 July 2025

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1

Chandrasekhar, Santosh. "CONSTRUCTION OF EFFICIENT AUTHENTICATION SCHEMES USING TRAPDOOR HASH FUNCTIONS." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/162.

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In large-scale distributed systems, where adversarial attacks can have widespread impact, authentication provides protection from threats involving impersonation of entities and tampering of data. Practical solutions to authentication problems in distributed systems must meet specific constraints of the target system, and provide a reasonable balance between security and cost. The goal of this dissertation is to address the problem of building practical and efficient authentication mechanisms to secure distributed applications. This dissertation presents techniques to construct efficient digit

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2

Arfaoui, Ghada. "Conception de protocoles cryptographiques préservant la vie privée pour les services mobiles sans contact." Thesis, Orléans, 2015. http://www.theses.fr/2015ORLE2013/document.

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Avec l'émergence de nouvelles technologies telles que le NFC (Communication à champ proche) et l'accroissement du nombre de plates-formes mobiles, les téléphones mobiles vont devenir de plus en plus indispensables dans notre vie quotidienne. Ce contexte introduit de nouveaux défis en termes de sécurité et de respect de la vie privée. Dans cette thèse, nous nous focalisons sur les problématiques liées au respect de la vie privée dans les services NFC ainsi qu’à la protection des données privées et secrets des applications mobiles dans les environnements d'exécution de confiance (TEE). Nous four

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3

Kaced, Ahmed Réda. "Problèmes de sécurité posés par les proxies d'adaptation multimédia : proposition de solutions pour une sécurisation de bout-en-bout." Phd thesis, Télécom ParisTech, 2009. http://pastel.archives-ouvertes.fr/pastel-00005883.

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L'évolution des techniques d'adaptation et des contenus multimédias adaptables a montré la nécessité de définir des techniques et des pratiques concernant la sécurité des échanges sur les réseaux. Dans la mesure où l'adaptation des documents multimédia nécessite d'autoriser la modification de ces documents entre le serveur et le client, il est important d'étudier les conditions nécessaires pour assurer ces modifications de façon sécurisée. Nous avons donc, dans ce cadre, à présenter un système de communication multimédia qui préserve l'authenticité et l'intégrité des contenus originaux de bout

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4

Holobinko, Anastasia. "STABLE ISOTOPE RATIOS AS A PROXY FOR HUMAN GEOGRAPHIC PROVENANCE: BIOGEOGRAPHICAL EVIDENCE FROM THE 2H, 18O, AND 13C SIGNATURES IN MODERN HUMAN TEETH." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/dissertations/1108.

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The positive identification of a decedent is paramount to a forensic investigation in which human remains have been recovered and must be identified. Due to increasing global mobility in the world's populations, it is not inconceivable that an individual might die far away from his or her home. Pinpointing an individual's geographic origin may contribute to definitive forensic identification of contemporary human skeletal remains in cases where dental records and other means of identification are either unavailable to law enforcement personnel or do not yield immediate results. Stable isotope

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5

W, Chung K., and 鍾國文. "One Time Proxy Signature." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/16465409209609498625.

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Shiu, Ming-Je, and 許明哲. "Threshold Group-Oriented Proxy Signature." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/87494597456717197275.

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7

Sun, Ti-Wen, and 孫荻雯. "Intrusion-Resilient Proxy Signature Schemes." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/43582078892031670781.

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碩士<br>國立交通大學<br>資訊科學系<br>91<br>We proposed intrusion-resilient proxy signature schemes, which combine time bounded proxy signature schemes and signer-base intrusion-resilient signatures. First, we set up a home base that shares proxy parameters with the proxy signer, updates and refreshes the proxy signer’s key. Second, the original signer generates proxy parameters and then divides them into two parts. The first part of them is sent to the proxy signer and the second part is sent to the home base. The proxy signer and the home base check the validity of those parameters. If it is correct, the

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Kung-Shuan, Huang, and 黃工栓. "Time Bounded Proxy Signature Scheme." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/62281409852963934267.

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碩士<br>國立交通大學<br>資訊科學系<br>90<br>Proxy signature is a signature scheme that is designed to delegate the original signer’s signing capability to a designated proxy signer. Then the proxy signer creates a proxy signature on behalf of the original signer. In this thesis, we proposed a new proxy signature scheme that is based on the GQ signature scheme. The proposed scheme satisfies all strong condition requirements and was proved to be secure. Furthermore, we introduced the concept of time bounded proxy signature schemes and proposed a concrete time bounded proxy signature scheme where g

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9

Hsu, Pi-Hung, and 徐碧鴻. "Practical anonymous proxy signature schemes." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/38408818578581757239.

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碩士<br>淡江大學<br>資訊工程學系碩士在職專班<br>96<br>Proxy signature schemes with anonymous proxy signers are called anonymous proxy signature schemes. Anonymous proxy signature schemes are used to protect proxy signers’ privacy. Among the proposed anonymous proxy signature schemes, Sum and Wei’s scheme is more practical than the other proposed scheme. However, their scheme does not satisfy strong unforgeability. Here, a new practical anonymous proxy signature scheme is first proposed with the help of concurrent signature schemes. In the new scheme, the anonymous names of proxy signers keep secret before

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10

"Strong proxy signature scheme with proxy signer privacy protection." 2002. http://library.cuhk.edu.hk/record=b5891247.

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by Shum Kwan.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2002.<br>Includes bibliographical references (leaves 30-32).<br>Abstracts in English and Chinese.<br>Acknowledgement --- p.ii<br>Abstract --- p.iii<br>□ □ --- p.iv<br>Chapter 1 . --- Introduction --- p.1<br>Chapter 1.1 --- Introduction to topic --- p.1<br>Chapter 1.2 --- What is proxy signature? --- p.2<br>Chapter 1.3 --- Terminologies in proxy signature --- p.2<br>Chapter 1.4 --- Levels of delegation --- p.3<br>Chapter 1.5 --- Previous work on Proxy Signature --- p.4<br>Chapter 1.6 --- Our Contributions --- p.4<br>C

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Nan, Guo Shin, and 郭信男. "Proxy Blind Signature Scheme with Proxy Signer Privacy Protection." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/01524065998773469285.

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12

Shi, Chi-Hwai, and 許琪慧. "Proxy Signature Schemes for Individual and Group-Oriented Proxy Signers." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/28938823014718953450.

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碩士<br>朝陽大學<br>資訊管理系碩士班<br>88<br>Most of the proposed proxy signature schemes need a secure channel between the original signer and the proxy signer. To remove the requirement of secure channels, Zhang proposed his proxy signature scheme without secure channels. However, there is a security disadvantage in Zhang''s scheme [6, 16]. Here an individual proxy signature scheme without secure channel is proposed. To authorize a group of proxy signers, many threshold proxy signature schemes [4, 14, 17, 19] are proposed. Among these schemes, some schemes [19] are not secure while some scheme [14,

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Tsai, Chung-Hsien, and 蔡崇賢. "Dynamic Threshold Proxy-Protected Signature Scheme." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/22492066651981433611.

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碩士<br>逢甲大學<br>資訊工程所<br>94<br>Digital signature is a mechanism to protect digital documents in electronic generation nowadays. However, according to the application of the actual circumstances, the original signer may wish to delegate the power of signing message to a designated proxy signer in some conditions. This solves the problem if the original signer is traveling. In order to reduce risk, the original signer may delegate the power of signing messages to several designate proxy signers. When the proxy signers achieve a certain number to approve the contents of the digital document, they w

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14

高俊海. "Proxy Blind Signature from Bilinear Pairings." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/32297880079500992805.

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15

Hseu, Chia-Huei, and 徐嘉煇. "A Secure Paillier Proxy Signature Scheme." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/00751654990598852427.

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碩士<br>國立臺灣海洋大學<br>資訊工程學系<br>94<br>Because of the property of additive homomorphism, the Paillier public-key cryptosystem is usually employed in designing the tallying or comparison mechanisms in electronic voting or electronic auction systems. In the physical deployment of these systems, it could happen frequently that people, who cannot attend an event personally, would like to participate through a proxy. In this thesis, two proxy-signature schemes based on the Paillier cryptosystem are proposed. The first one is a proxy-unprotected scheme and the second one is a proxy-protected scheme.

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Tsai, Chih-Chun, and 蔡志村. "Threshold One-Time Proxy Signature Scheme." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/57557184467488356084.

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碩士<br>國立交通大學<br>電機資訊學院碩士在職專班<br>94<br>Recently, many excellent proxy signature schemes have been proposed. For advanced security issue, here we present a more secure method. It allows the delegation of signature power to one or more entities that jointly play the role of a proxy signer. We use characteristic of threshold and trust party and combinatorial object PHF to propose our scheme. In a (w, n) threshold proxy signature, the original signer can delegate the power of signing messages to n proxy signers so that any w or more proxy signers cooperatively generate a proxy signature on behalf o

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Ching-Fen, Tsai, and 蔡靜芬. "Threshold proxy signature in hierarchical authorization." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/87469488774895322499.

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碩士<br>國立臺灣科技大學<br>資訊管理系<br>88<br>Proxy signature scheme, introduced by Mambo et al. in 1996, allow a designated person, a proxy signer, to sign messages on behalf of an original signer. After that, Kim et al. presented another new type of proxy signature scheme, called (t,n) threshold proxy signature scheme. That scheme allows t or more proxy signers from a designated group of proxy signers to sign messages on behalf of the original one. The (t,n) threshold proxy signature scheme conceptualized from Kim''s one has a drawback in practical applications. That is, the proxy group m

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Li, Yu-Ji, and 李煜基. "The research of multi-proxy signature." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/70598386950673837638.

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碩士<br>輔仁大學<br>資訊管理學系<br>89<br>Most of proposed multi-proxy signature schemes based on discrete logarithm. In this paper, we hope to combine discrete logarithm with factorization, that strengthen the security of multi-proxy.　Both of discrete logarithm and factorization are the hard problem of computational complexity. In execution of multi-proxy signature, we have to think over the problem of proxy change, for example quit job, sickness, or death. Then, in the paper, we hope to improve multi-proxy signature scheme for the problem of proxyies append and delete by Rabin’s scheme.

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19

Ji, Wen-Cheng, and 紀汶承. "An Efficient Certificateless Proxy Signature Scheme." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/34395828465872435247.

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碩士<br>國立中興大學<br>資訊科學與工程學系所<br>98<br>Proxy signature is a new signature technique, such that an original signer is able to delegate his ability of signing to a proxy known as a “proxy signer”. In this thesis, we propose a new certificateless proxy signature scheme. Our scheme is provably secure in the random oracle model against the malicious KGC and public key replacement attack under the hardness assumption of the CDH problem.

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Hsiao, Yung-Hung, and 蕭永泓. "A Study and Application of Proxy Signature." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/8xh582.

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碩士<br>逢甲大學<br>資訊工程所<br>90<br>Since Mambo, Usuda and Okamoto introduced the proxy signature scheme, many variant schemes have been proposed to achieve the varied specific requirements in a proxy signature situation. A (t, n) threshold proxy signature scheme is a signature that t or more proxy signers of assigned group of n proxy signers sign a message on behalf of an original signer. In the thesis, we will propose some disadvantages and weaknesses of the previous threshold proxy signature schemes. Furthermore, we propose a new threshold proxy signature scheme to overcome the weaknesses of the p

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Huang, Shao-nung, and 黃劭農. "Identity-based multi-proxy threshold signature scheme." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/68572252859043360980.

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碩士<br>逢甲大學<br>資訊工程所<br>95<br>We present three identity-based multi-proxy threshold signature schemes. First one is easier to manage. the second one is anonymity, the third one is anomymity and traceable. The main features of our proposed work are: (a)ID-based scheme reduces certificate management, (b) riginal signers and proxy signers are both allowed to be a group (c) only t or more proxy signers of the group can cooperatively issue a proxy signature on behalf of the original signer group, (d) the first and the third proposed schemes, we allow anyone join the original group without reset the

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Ke, BingRu, and 柯炳如. "ID-Based and Undeniable Proxy Signature Schemes." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/36304218040964948078.

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碩士<br>朝陽科技大學<br>資訊管理系碩士班<br>89<br>Today, the overarching internet is used broadly in business of very wide range. At present, there are many kinds of successful applications to provide business implementations over the internet such as secret sharing, key exchange, user authentication, electronic payments, and digital signature. Hand-written signatures have long been used as proof of authorship of the contents of a document. During the contemporary business transaction on the internet, Digital signature is one of the most popular methods used to provide the same benefit as the conve

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Wu, Jun-Hui, and 吳俊輝. "A Secure Threshold Paillier Proxy Signature Scheme." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/84084357643690893338.

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碩士<br>國立臺灣海洋大學<br>資訊工程學系<br>96<br>In this thesis, a threshold Paillier proxy signature scheme is proposed. The additive homomorphism of the Paillier cryptosystem, together with the proxy mechanism and the threshold trust make it more convenient than other probabilistic cryptosystems in designing electronic voting systems or electronic auction systems. In this thesis, this scheme is proven to be unforgeabile, proxy-protected, undeniabile, secret and signer-identi?able against chosen message attackers in the random oracle model. These security properties of this scheme are based on the computati

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Huang, Chung-Yuan, and 黃宗元. "Threshold Proxy Signature based on GQ scheme." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/09427588242274926553.

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碩士<br>國立交通大學<br>資訊科學系<br>91<br>A (t,l) threshold proxy signature is a signature scheme that is designed to delegate the original signer signing capability to a designated group of l proxy signers. Only any t or more proxy signers of the designated group can generate the proxy signature behalf of the original signer. In this thesis, we propose the first (t,l) threshold proxy signature scheme based on GQ signature. The proposed scheme satisfies all requirements of a proxy signature and a threshold signature under adaptive adversary.

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陳美智. "Threshold Proxy Signature Scheme Using Pairing System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/18040768779206724573.

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Hung, Shih-che, and 洪士哲. "An Efficient Secure Anonymous Proxy Signature Scheme." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/69009888335244650793.

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碩士<br>南華大學<br>資訊管理學系<br>100<br>Proxy signature schemes can be used in many business applications such as when the original signer is not present to sign important documents. Any proxy signature scheme has to meet the identifiability, undeniability, verifiability and unforgeability security requirements. In some conditions, it may be necessary to protect the proxy signer’s privacy from outsiders or third parties. Recently, several studies about proxy signature schemes have been conducted but only Yu et al.’s anonymous proxy signature scheme proposed in 2009 attempting to protect the proxy sig

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Lin, I.-Shu, and 林易澍. "Multi-Agent Designated Proxy Re-Signature Scheme." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/62023683540369064890.

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碩士<br>國立中山大學<br>資訊工程學系研究所<br>100<br>With the convenience and development of digital signature and network technologies, several companies are beginning to transmit documents and messages over networks.This is expected to reduce costs and improve the efficiency of the working process. Based on the typical digital signature technique over public key infrastructure, each company can apply for its own certificate from the certificate authority to enable people to verify whether a message is signed by the company through the public key within the certificate. Generally, a general manager is respons

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WANG, SHEN-HONG, and 王聖鈜. "An Improved Identity-based Proxy Signature Scheme." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/f4dfzv.

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碩士<br>國立高雄應用科技大學<br>資訊工程系<br>104<br>Proxy signature schemes allow a signer to designate another party as a proxy signer. The proxy signer can sign a document on behalf of the original signer, while she /he is away (on vacation for example). Identity-Based cryptography uses a per-son's ID as public key to avoid the need of certificate. Recently, more and more Iden-tity-Based Proxy Signature (IBPS) schemes have been proposed. In particular, Hu et al. proposed an IBPS scheme in 2015, and showed that their scheme is more efficient than two other IBPS schemes proposed by Cao et al. and Gu et al., r

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Pradhan, Srikanta. "Proxy Blind Signature using Hyperelliptic Curve Cryptography." Thesis, 2013. http://ethesis.nitrkl.ac.in/5349/1/211CS2286.pdf.

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Blind signature is the concept to ensure anonymity of e-coins. Untracebility and unlinkability are two main properties of real coins and should also be mimicked electronically. A user has to fulll above two properties of blind signature for permission to spend an e-coin. During the last few years, asymmetric cryptosystems based on curve based cryptographiy have become very popular, especially for embedded applications. Elliptic curves(EC) are a special case of hyperelliptic curves (HEC). HEC operand size is only a fraction of the EC operand size. HEC cryptography needs a group order of size at

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Kuang-Hsi, Chen. "(Anonymous) Proxy Automatic Signature Schemes with Compiler Agents." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0002-2706200622060600.

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Huang, Jun Ming, and 黃俊銘. "Group-Authorized Proxy Signature subject to Anonymous Veto." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/12801801561149279872.

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碩士<br>國立臺灣海洋大學<br>資訊工程學系<br>96<br>It is common that a group of people jointly decide and authorize somebody as a representative in some business/poitical occasions. For example, the board of directors of a company authorizes the chief executive officer to close a multi-billion acquisition deal. In this paper, we formalize the requirements and provide for the first time a protocol that integrates the functions of collective decisions subject to anonymous veto, distributed proxy key generation, secure transmission of proxy key, unforgeable proxy signature scheme where the original signer can del

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Chen, Kuang-Hsi, and 陳光熹. "(Anonymous) Proxy Automatic Signature Schemes with Compiler Agents." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/01557857414255083910.

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碩士<br>淡江大學<br>資訊工程學系碩士班<br>94<br>Many (proxy) automatic signature schemes are proposed to guard against the (unknown) virus infection with the help of honest compiler makers. Among these proposed schemes, the agreement between the compiler maker and compiler severs is confirmed by two distinct signatures. It is inefficient to adopt two distinct signatures to confirm the same agreement. To overcome this inefficiency, our first scheme is proposed. In these proposed schemes and our scheme, the used compiler agents’ public keys should be certificated and maintained by verifiers. If verifiers

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Chan, Ching-Chung, and 詹景中. "Anonymous (Multi-)Proxy Signature Scheme with Undeniable Agent." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/73522839475865602282.

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碩士<br>淡江大學<br>資訊工程學系<br>92<br>In an anonymous proxy signature scheme, proxy signatures can be validated without knowing proxy signers. Shum and Wei [17] first proposed the related proxy signature scheme. However, their scheme has heavy burden caused by trusted alias issuing authorities and authenticated secure channels. To remove trusted authorities, a new anonymous proxy signature scheme is proposed by us. For the group-oriented applications, an anonymous multi-proxy signature scheme is also proposed by us. Moreover, the anonymity of our anonymous multi-proxy signature scheme is so stron

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Liu, JungChen, and 劉容禎. "Proxy Signature Scheme Based on Elliptic Curve Cryptography." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/17122502371288701959.

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碩士<br>國立中興大學<br>資訊科學研究所<br>92<br>In 2001, Hwang and Chen proposed a new multi-proxy multi-signature scheme based on Discrete Logarithm Problem. In their scheme, a group of original signers could authorize a group of proxy signers to sign messages. Only the cooperation of all proxy signers could generate valid multi-proxy multi-signatures. In 2002, Sun et al. pointed out that Hwang-Chen’s scheme was insecure. The attacker could forge a signature for an arbitrary message which satisfied the verification equation without having proxy signers’ secret keys. In this thesis, we improve Hwang-Chen’s m

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Hwang, Sheng-Yu, and 黃勝郁. "Threshold Proxy Partially Blind Signature and Its Applicaitions." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/92597384194289522224.

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Chen, Ming-Yang, and 陳明陽. "A Research of Forward Secure Proxy Signature Scheme." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/29165984306452253813.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>92<br>Proxy signature schemes are the variation of digital signature schemes. Since Mambo et al. proposed the concept of the proxy signature scheme in 1996; it is useful for people to delegate their own power to other party. If a manger delegates his rights to his secretaries while he traveling outside, the secretaries can sign the message on behalf of the manger. 　　As we know, the proxy signature schemes have been proposed before have no forward-secure ability. So, those schemes are dangerous while the secret key exposure. In this thesis, we proposed a proxy sign

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Lin, Tzu-Shin, and 林子馨. "A Proxy Signature Scheme with Forward Secure Property." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/33371796035829195562.

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碩士<br>國立交通大學<br>資訊工程系<br>91<br>Nowadays, an electronic transaction is more and more popular. Besides, not only designing a job but also sending secret document is through the Internet. Thus, the digital signature scheme is indispensable to the electronic would. Proxy signature scheme was proposed in 1996, which makes original signers be able to delegate his digital signature signing capability to a proxy signer. On the other way, the greatest problem against the security of a digital signature scheme is exposure of the secret key, because we cannot trust all signatures singed by this key even

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Hsieh, Bin-Tsan, and 謝濱燦. "Provably Secure Proxy Signature Schemes for Compound Circumstances." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/62062399909772822997.

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博士<br>國立成功大學<br>資訊工程學系碩博士班<br>93<br>A proxy signature scheme, a variation of ordinary digital signature scheme, enables a proxy signer to sign messages on behalf of the original signer. Proxy signature schemes have been shown to be useful in many applications. For example, a manager can delegate his secretaries to sign documents while he is on vacation. Proxy signature schemes can also be used in electronics transaction and mobile agent environment. 　　Besides the ordinary proxy signature schemes, many variations were proposed with special properties, such as one-time proxy signature scheme, at

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Huang, Xiao-Wei, and 黃曉偉. "An RSA-based (t, l) Threshold Proxy Signature." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/89591276325242220711.

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碩士<br>國立臺灣海洋大學<br>資訊工程學系<br>95<br>In this thesis we propose and analyze a new RSA-based proxy signature scheme and its corresponding (t, ) threshold scheme. Unlike numerous previous research works, the threshold proxy scheme does not require any trusted combiner and is thus a truly practical approach. The security of both schemes is based on the RSA assumption. Both schemes are existentially unforgeable against no message attack in the random oracle model and especially the threshold proxy scheme inherits the merit of its predecessor - Shoup’s RSA threshold scheme - and thus is secure under a

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Tzeng, Shiang-Feng, and 曾祥峰. "A Study on Generalization of Proxy Signature Schemes." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/75444117573354112325.

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碩士<br>朝陽科技大學<br>資訊管理系碩士班<br>91<br>Digital signatures are widely used to replace hand-written signatures in the digital world. However, sheer simple digital signature schemes are not enough to satisfy some practical conditions. Take proxy delegation for example. Traditional digital signature schemes do not meet this requirement. To remedy this weakness, the proxy function has been added to digital signature schemes, and this new type of digital signature is called proxy signature. In this study, we first discuss the characteristics and requirements for the proxy signature. Then, we survey the

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Chen, Chiu-Chin, and 陳秋錦. "The Group-oriented Design on Proxy Signature Schemes." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/52788628244863964589.

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碩士<br>朝陽科技大學<br>資訊管理系碩士班<br>90<br>After Mambo et al. proposed the concept of proxy signatures, many group-oriented proxy signature schemes are proposed due to practical situations. Some new group-oriented proxy signature schemes are proposed. One is the proxy multi-signature scheme. The proxy multi-signature schemes are proposed by Yi et al.. Since Yi et al.’s scheme is insecure, Sun proposed his two proxy multi-signature schemes. However, in both Sun’s and Yi et al.’s schemes, the proxy certificate is proportional to the size of the signers. To overcome this shortage, our scheme is prop

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Panda, Suryakanta. "Time Stamped Proxy Blind Signature Scheme With Proxy Revocation Based on Discrete Logarithm Problem." Thesis, 2013. http://ethesis.nitrkl.ac.in/5057/1/211CS1273.pdf.

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Proxy blind signature combines both the properties of blind signature and proxy signature. In a proxy blind signature scheme, the proxy signer is allowed to generate a blind signature on behalf of the original signer. It is a protocol played by three parties in which a user obtains a proxy signer’s signature for a desired message and the proxy signer learns nothing about the message. During the veriﬁcation of a proxy blind signature scheme, the veriﬁer cannot get whether signing is within the delegation period or after delegation period. In this thesis a time stamped proxy blind signature sche

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Lee, Yun Hua, and 李韻華. "Anonymous proxy group-oriented signature scheme with undeniable agents." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/79660344727882172900.

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碩士<br>淡江大學<br>資訊工程學系<br>91<br>Since Mambo et al. proposed the concept of proxy signature schemes, there are many kinds of proxy signature schemes are proposed. In these schemes, in order to protect proxy signers, the public keys of proxy signers should be used to verify proxy signatures. So the identity of the proxy signer is public in these proxy signature schemes. Actually, in many situations, the proxy signer doesn’t want that anyone knows his identity in order to avoid disturbance. Therefore the anonymous proxy signature scheme with undeniable agents is proposed here. Except satisf

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Huang, Cheng-Jian, and 黃承健. "A Study of Proxy Signature Schemes with Time-Stamp." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/x5z37f.

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碩士<br>朝陽科技大學<br>資訊管理系碩士班<br>93<br>In current proxy signature schemes, an original signer delegates her/his signing capability to a proxy signer, and then the proxy signer can sign messages on behalf of the original signer. Although these schemes have succeeded in proxy delegations, they share a common problem. That is, a verifier cannot ascertain a proxy signature was signed by the proxy signer during the delegation period. Additionally, these schemes are in general defective in proxy revocations. In this research, we proposed two new proxy signature schemes to resolve the above problems. The

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Kuo, Shu-Chuan, and 郭淑娟. "An Electronic Check Payment Scheme Based on Proxy Signature." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/46515952831573684141.

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碩士<br>國立中興大學<br>資訊科學研究所<br>91<br>Due to the rapid development of the Internet, electronic commerce has become more and more popular. Many payment systems have been proposed. However, a secure, efficient and convenient electronic payment system is still desideratum. There are four kinds of payment systems, namely e-wallet, credit card e-cash and e-check. The first two systems need to transact through secure electronic transaction systems. However, the cost of building the system is expensive. When it comes to e-cash, it existes some general problems after surveying related works. For these reas

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Liang, Ling-Ren, and 梁菱仁. "Proxy Signature Applied in Monitoring System for Terrain Changes." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/82146696986541442894.

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碩士<br>朝陽科技大學<br>資訊工程系碩士班<br>99<br>As cities gradually develop, more roadways are needed to facilitate traffic networks. However, cities may be separated by hills, and thus many roadways are developed along hillsides or on the hills. Loose soil and landslides are inevitable after natural disasters assaults, resulting in accidents. Current technology development can make use of sensors or equipment to monitor soil conditions. However, transmitted information may be altered by someone with malicious intent, which influences the ability of monitoring organizations to produce correct judgment. In o

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Wang, Jian-Hong, and 王建鋐. "Research of Proxy Signature with Restricted Times of Delegation." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/43266249738941708431.

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碩士<br>國立中央大學<br>資訊工程學系<br>101<br>Proxy signature, a type of digital signature, allows the original signer to authorize the proxy signer to sign documents on behalf of the original signer and this practical function becomes useful for many applications. However, unlimited delegation of signing capability might lead to security concern. If a proxy signer generates inappropriate proxy signatures with bad intention during the delegation period, the original signer may suffer great losses. To address the aforementioned issue, Choi et al. proposed a modified Schnorr signature scheme with restricte

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Mudgil, Pushpendra, and Chandni Murmu. "A Strong Proxy Signature Scheme based on Partial Delegation." Thesis, 2013. http://ethesis.nitrkl.ac.in/4629/1/109CS0119.pdf.

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Proxy signature scheme is an extension of digital signature scheme first introduced by Mambo et al. in 1996, which allows a signer to delegate the signing capability to a designated person, called a proxy signer. There are three types of delegation, namely, full delegation, partial delegation, and delegation by warrant. In early proxy signature schemes, the identity of the proxy signer can be revealed by any trusted authority if needed. How- ever, a secured proxy signature scheme must satisfy various properties, such as, verifiability, strong un-forgeability, nonrepudiation, privacy, and stron

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Tsung, Lo Yuan, and 羅元琮. "A Distributed Nominative Proxy Signature Mechanism for Ad Hoc Networks." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/11407082104539592206.

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碩士<br>國立交通大學<br>資訊管理研究所<br>94<br>Digital signature which is usually used in many kinds of digital documents and only generated by the original signer in this digital age may result in several inconveniences. So, in order to solve the dilemma that digital signatures can’t be generated without the original signer, some scholars proposed a new scheme called Proxy Signature. By the showing up of Proxy signature scheme, the original signer could designate a proxy to perform the signing by generating valid digital signatures on behalf of the original signer when it is not there. However, there is no

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Hsu, Hung Kai, and 許紘愷. "Research Campus Information System of the digital signature for proxy." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/18221786029371400482.

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碩士<br>萬能科技大學<br>資訊管理研究所<br>104<br>In recent years, due to the prevalence of WWW Internet, and in the clouds with the development of technology, almost no people at all levels in accordance spared, in the vastness of the Internet world, change our human habits and absorb information the way. In the process of the evolution of the use of cloud computing, but also generated a lot of downside risks, such as: data loss and leakage, cyber attacks,insecure interface, internal malicious behavior, cloud computing services abuse or misuse, inadequate management review an

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