Application Analyses of Visual Information Processing Techniques in E-Commerce

Digital visual information plays a very important role in E-Commerce (EC). Their usage brings forth many novel research topics for digital visual information processing skills and software. Some issues of application analysis of image/video information processing techniques suitable for EC are described in the paper. Visual design for goods or services trading, image retrieval based on visual contents, applications of images to the trade safety on the Internet, 3-dimensional display, virtual reality for goods browsing, inquiry based on image and video contents, trade safety and copyright protection of digital works based on digital watermarking are mainly discussed which are considered as the technological solutions that could enhance EC

A fair online payment system for digital content via subliminal channel

In recent years, purchase of digital content using the Internet has been increasing both in popularity and convenience. On the other hand, there are a multitude of pirated editions for digital products which have become more available and easier to attain. Therefore, proving legal ownership of digital content has become important. Many researchers have proposed various schemes to protect consumer's ownership using watermark mechanisms on secure payment systems. In our scheme, we want to achieve this same result with the concept of subliminal channels and propose an intact arbitration mechanism to solve the fairness of the transaction between both the customer and the shop. Our scheme not only protects customers' legal ownership of digital content, but also provides a fair and secure protocol. (C) 2010 Elsevier B.V. All rights reserved

The Study of a Fair Electronic Payment System for Digital Content

因為網路的流行和方便，使得越來越多的消費者透過網路購買數位產品。然而，大量的數位內容產品也變得更容易偽造和取得。因此，如何證明誰是合法數位內容的擁有者成為一個重要問題。許多研究者提出不同買賣浮水印的機制，在安全付款系統藉此保護消費者的所有權。在本文中，我們將藉由潛隱通道的觀念來維護客戶的所有權，並提出一個完整的仲裁機制，以解決消費者和商家雙方之間的公平交易。為了實現上述目標，此協定的安全性基於五種加密技術，包含：潛隱通道，Nyberg-Rueppel機制，單向赫序函數，Schnorr簽章法和RSA密碼系統。我們提出了兩個付款方案:建立在解離散對數安全性問題的線上交易系統和建立在解質因數分解安全性問題的離線交易系統。我們的方案不僅可以保護客戶合法的數位內容擁有權，而且可以達到交易的公平性和客戶的隱密性，提款現金的所有權追蹤和交易過程的安全性。More and more customers purchase digital contents through the Internet due to its b popularity and convenience. However, there are a multitude of pirated editions of digital products that have become more available and easier to attain. Therefore, proving the legal ownership of digital contents has becomes more important than ever before. Many researchers have proposed various schemes to protect consumer''s ownership with watermarking mechanisms on secure payment systems. In this paper, we want to preserve customer's ownership via subliminal message and propose an intact arbitration mechanism to solve the fairness of transactions between both the customer and the shop. In order to achieve above objectives, the security of this protocol employs five cryptographic techniques including the subliminal channel, Nyberg-Rueppel scheme, one-way hash function, Schnorr signature scheme and RSA cryptosystem. We propose two payment schemes: on-line payment system based on discrete logarithms problem and off-line payment system based on factoring problem. Our schemes not only protect customer's legal ownership of digital content, but also achieve fair transaction, customer anonymity, owner tracing of coin and payment security.Abstract I 中文摘要 II Table of Contents III List of Tables VI List of Figures VII Chapter 1 Introduction 1 1.1 Motivations 1 1.2 Related works 2 1.3 Thesis Organization 3 Chapter 2 Preliminaries 4 2.1 Nyberg-Rueppel scheme 4 2.2 One-way hash function 4 2.3 Schnorr signature scheme 4 2.4 RSA digital signature 5 Chapter 3 6 A fair online payment system for digital content via subliminal channel 6 3.1 Our proposed scheme 6 3.1.1 Open account phase 7 3.1.2 The Withdrawal phase 8 3.1.3 The Payment phase 10 3.1.4 The fair arbitration phase 14 3.1.5 The legal owner arbitration phase 16 3.2 Security analyses and discussions of online scheme 17 3.2.1 Security analyses 17 3.2.1.1 The replay attack issue 17 3.2.1.2 Conspiracy attack issue 18 3.2.1.3 The DoS attack issue 19 3.2.1.4 Man-in-the-middle attack issue 19 3.2.1.5 Double spending issue 19 3.2.2 Unforgeability 19 3.2.3 Anonymity 20 3.2.4 Non-repudiation 20 3.2.5 Fairness issue 22 3.2.6 Piracy tracing problem issue 23 3.2.7 Discussions 24 Chapter 4 26 A fair offline digital content transaction system on RSA 26 4.1 Our proposed scheme 26 4.1.1 The registration phase 27 4.1.2 The Withdrawal phase 28 4.1.3 The transaction phase 30 4.1.4 The deposit phase 33 4.1.5 The fair arbitration phase 33 4.1.6 The legal owner arbitration phase 35 4.2 Security analyses and discussions of offline scheme 36 4.2.1 Security analyses 36 4.2.1.1 The replay attack issue 36 4.2.1.2 Conspiracy attack issue 37 4.2.1.3 The DoS attack issue 37 4.2.1.4 Man-in-the-middle attack issue 37 4.2.2 Unforgeability 37 4.2.3 Anonymity 38 4.2.4 Non-repudiation 38 4.2.5 Fairness issue 39 4.2.6 Owner tracing of E-cash issue 39 4.2.7 Discussions 39 Chapter 5 Conclusions 43 References 4