Strong proxy signature scheme with proxy signer privacy protection.

by Shum Kwan.Thesis (M.Phil.)--Chinese University of Hong Kong, 2002.Includes bibliographical references (leaves 30-32).Abstracts in English and Chinese.Acknowledgement --- p.iiAbstract --- p.iii□ □ --- p.ivChapter 1 . --- Introduction --- p.1Chapter 1.1 --- Introduction to topic --- p.1Chapter 1.2 --- What is proxy signature? --- p.2Chapter 1.3 --- Terminologies in proxy signature --- p.2Chapter 1.4 --- Levels of delegation --- p.3Chapter 1.5 --- Previous work on Proxy Signature --- p.4Chapter 1.6 --- Our Contributions --- p.4Chapter 1.7 --- Thesis Organization --- p.4Chapter 2. --- Backgroun d --- p.6Chapter 2.1 --- Digital Signature --- p.6Chapter 2.2 --- Digital Certificate and CA --- p.6Chapter 2.3 --- Hash Functions --- p.7Chapter 2.4 --- Bit commitment --- p.7Chapter 3. --- Brief introduction to Our Result --- p.8Chapter 3.1 --- A Proxy Signature Scheme with Proxy Signer Privacy Protection --- p.8Chapter 3.2 --- Applications of Proxy Signature --- p.9Chapter 4. --- Detail Explanation of Certified Alias and its Application on Proxy Signature --- p.10Chapter 4.1 --- Introduction --- p.10Chapter 4.2 --- Protecting Signer Privacy Using Certified Alias Definition 4.2.3 --- p.10Chapter 4.3 --- Constructing Proxy signature Scheme by Consecutive Execution of Cryptographic Primitives (Scheme CE) --- p.11Chapter 4.4 --- Constructing Proxy signature Scheme by Direct Form Equations (Scheme DF) --- p.15Chapter 4.5 --- Comparison between scheme CE and scheme DF --- p.19Chapter 4.6 --- Chapter Summary --- p.20Chapter 5 . --- Applications of Proxy Signature with Proxy Signer Privacy Protection --- p.21Chapter 5.1 --- Secure Mobile agent Signature with Itinerary Privacy --- p.21Chapter 5.1.1 --- Introduction to Mobile Agent --- p.21Chapter 5.1.2 --- "Review on Lee, et al. strong non-designated proxy signature scheme for mobile agents" --- p.21Chapter 5.1.3 --- Constructing Signature scheme for Mobile Agent using Proxy signature with Proxy Signer Privacy Protection --- p.22Chapter 5.1.4 --- Remarks --- p.23Chapter 5.2 --- Group Signature with Unlimited Group Size --- p.24Chapter 5.2.1 --- Introduction to group signature --- p.24Chapter 5.2.2 --- Constructing group signature scheme using certified alias --- p.24Chapter 5.2.4 --- Remarks --- p.26Chapter 5.3 --- Chapter Summary --- p.27Chapter 6. --- Conclusions --- p.28Appendix: Paper derived from this thesis --- p.29Bibliography --- p.3

A Strong Proxy Signature Scheme based on Partial Delegation

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 strong identifiability. In this thesis, we propose a strong proxy signature scheme based on two computationally hard assumptions, namely, Discrete Logarithmic Problem (DLP) and Computational Die-Helmann (CDH) problem, which satisfies all the security properties of a standard proxy signature scheme. The property `strong' refers to the fact that only a designated person can only verify the authenticity of the proxy signature

Secure Mobile Agents in Electronic Commerce by Using Undetachable Signatures from Pairings

It is expect that mobile agents technology will bring significant benefits to electronic commerce. But security issues, especially threats from malicious hosts, become a great obstacle of widespread deployment of applications in electronic commerce based on mobile agents technology. Undetachable digital signature is a category of digital signatures to secure mobile agents against malicious hosts. An undetachable signature scheme by using encrypted functions from bilinear pairings was proposed in this paper. The security of this scheme base on the computational intractability of discrete logarithm problem and computational Diffe-Hellman problem on gap Diffle-Hellman group. Furthermore, the scheme satisfies all the requirements of a strong non-designated proxy signature i.e. verifiability, strong unforgeability, strong identifiability, strong undeniability and preventions of misuse. An undetachable threshold signature scheme that enable the customer to provide n mobile agents with ‘shares’ of the undetachable signature function is also provided. It is able to provide more reliability than classical undetachable signatures

Secure and privacy-aware proxy mobile IPv6 protocol for vehicle-to-grid networks

Vehicle-to-Grid (V2G) networks have emerged as a new communication paradigm between Electric Vehicles (EVs) and the Smart Grid (SG). In order to ensure seamless communications between mobile EVs and the electric vehicle supply equipment, the support of ubiquitous and transparent mobile IP communications is essential in V2G networks. However, enabling mobile IP communications raises real concerns about the possibility of tracking the locations of connected EVs through their mobile IP addresses. In this paper, we employ certificate-less public key cryptography in synergy with the restrictive partially blind signature technique to construct a secure and privacy-aware proxy mobile IPv6 (SP-PMIPv6) protocol for V2G networks. SP-PMIPv6 achieves low authentication latency while protecting the identity and location privacy of the mobile EV. We evaluate the SP-PMIPv6 protocol in terms of its authentication overhead and the information-theoretic uncertainty derived by the mutual information metric to show the high level of achieved anonymity

SIGNCRYPTION ANALYZE

The aim of this paper is to provide an overview for the research that has been done so far in signcryption area. The paper also presents the extensions for the signcryption scheme and discusses the security in signcryption. The main contribution to this paper represents the implementation of the signcryption algorithm with the examples provided.ElGamal, elliptic curves, encryption, identity-based, proxy-signcryption, public key, ring-signcryption, RSA, signcryption