<p>The purpose of this thesis work was to make a survey of current on-line payment technologies and find out which are they and how do they work? Compare and analyze them from a security point of view, as well as a usability point of view. What is good? What is bad? What is lacking?</p><p>To achieve this purpose, an overview of the current on-line payment technologies was acquired through academic books and papers, Internet sites, magazines. Basic cryptographic and security related techniques were studied for the security analysis of current on-line payment systems.</p><p>In this work, various current on-line payment systems were classified into two groups [Macro and Micro on-line payment systems]. This classification was based on the mode of on-line payment transactions. To analyze these on-line payment systems, a set of payment system requirements were formed [Security Issues, Usability Issues, Anonymity, Scalability etc].</p><p>Under the category of Macro payment system, Credit Card payment system, Debit Card payment system, Stored Value Card payment system, Electronic Check payment system, Electronic Cash payment system, Electronic account transfer payment system and mobile payment system transactions were examined.</p><p>Under the category of Micro payment system, Hash Chain based Payment System, Hash Collisions and Hash sequences based Payment Systems, Shared Secrete Keys based Payment Systems and Probability based payment systems were examined.</p><p>Based on the requirements of payment system, these on-line payment systems were analyzed and compared. In the analysis phase, the advantages and drawbacks of these payment systems were figured out.</p><p>It was found from the study that the credit card based payment systems are the most widely used means of conducting on-line payments. It is evident that credit card based payment systems satisfy stakeholder requirements the best, as they offer more flexible payment options, having a large user-base, benefit from familiarity and simplicity of use and also allow international payments. The other on-line payment systems lack this flexibility</p><p>It can also be extracted from the study that users want more simplified, convenient and secure on-line payment systems. Thus the futuristic on-line payment systems will have all secure payment options into one system.</p>

The purpose of this thesis work was to make a survey of current on-line payment technologies and find out which are they and how do they work? Compare and analyze them from a security point of view, as well as a usability point of view. What is good? What is bad? What is lacking? To achieve this purpose, an overview of the current on-line payment technologies was acquired through academic books and papers, Internet sites, magazines. Basic cryptographic and security related techniques were studied for the security analysis of current on-line payment systems. In this work, various current on-line payment systems were classified into two groups [Macro and Micro on-line payment systems]. This classification was based on the mode of on-line payment transactions. To analyze these on-line payment systems, a set of payment system requirements were formed [Security Issues, Usability Issues, Anonymity, Scalability etc]. Under the category of Macro payment system, Credit Card payment system, Debit Card payment system, Stored Value Card payment system, Electronic Check payment system, Electronic Cash payment system, Electronic account transfer payment system and mobile payment system transactions were examined. Under the category of Micro payment system, Hash Chain based Payment System, Hash Collisions and Hash sequences based Payment Systems, Shared Secrete Keys based Payment Systems and Probability based payment systems were examined. Based on the requirements of payment system, these on-line payment systems were analyzed and compared. In the analysis phase, the advantages and drawbacks of these payment systems were figured out. It was found from the study that the credit card based payment systems are the most widely used means of conducting on-line payments. It is evident that credit card based payment systems satisfy stakeholder requirements the best, as they offer more flexible payment options, having a large user-base, benefit from familiarity and simplicity of use and also allow international payments. The other on-line payment systems lack this flexibility It can also be extracted from the study that users want more simplified, convenient and secure on-line payment systems. Thus the futuristic on-line payment systems will have all secure payment options into one system.

Submitted by Mariana Dornelles Vargas (marianadv) on 2015-03-25T13:57:02Z No. of bitstreams: 1 4iPay.pdf: 3380679 bytes, checksum: 49edaff25098492ab3c46fcf4aad082b (MD5) / Made available in DSpace on 2015-03-25T13:57:02Z (GMT). No. of bitstreams: 1 4iPay.pdf: 3380679 bytes, checksum: 49edaff25098492ab3c46fcf4aad082b (MD5) Previous issue date: 2012 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Este trabalho tem por objetivo apresentar um modelo de arquitetura e usabilidade para um sistema de pagamento móvel (Mobile Payment System), considerando as premissas de independência de dispositivo, de localização, de operadora de telefonia móvel e de administradora financeira para suprir as necessidades de efetivar pagamentos e recebimentos de qualquer natureza em ambientes de comércio ubíquo (Ubiquitous Commerce). O trabalho inicialmente descreve a motivação, os objetivos e os conceitos fundamentais sobre os quais se baseia a proposta do modelo. A seguir são elencados os principais trabalhos relacionados e uma análise comparativa detalhada é realizada, derivando as características mais importantes a serem consideradas no modelo proposto. Em seguida, é proposto um modelo de pagamento móvel, denominado 4iPay, onde são detalhados os objetivos, arquitetura, recursos e a proposta técnico-científica de comércio eletrônico em ambientes ubíquos. Na proposição do modelo foi considerada a convergência dos trabalhos relacionados analisados no que tange à ubiquidade, unicidade, universalidade e unissonância. Assim, o modelo 4iPay pretende reunir as melhores características, inovando e melhorando em alguns aspectos relevantes ao comércio ubíquo de fato. O modelo proposto visa propor uma solução diferenciada em termos de arquitetura, modelo de negócio, usabilidade, baixo consumo de banda e alto desempenho nas transações de pagamento e recebimento, em relação às propostas atuais, levando em consideração, nas transações comerciais eletrônicas móveis, questões como independência de dispositivo, localização física, segurança e confiabilidade, além de outras características expostas ao longo do trabalho, como otimização no uso de protocolos de comunicação e flexibilidade na utilização de conexões locais ou remotas. Também são descritos cenários efetivos de uso de onde e como o modelo 4iPay pode ser aplicado. Para tanto é apresentado o protótipo desenvolvido para avaliar o modelo. Por fim, são apresentados os resultados obtidos na avaliação dos cenários, nas avaliações de desempenho da aplicação e na pesquisa de campo de aceitação do modelo proposto. / This work aims at presenting a usability and architectural model for a mobile payment system. In our model, we assume independence of devices, of location, of mobile operator, and of administrator, to allow all kinds of payment in ubiquitous environments (Ubiquitous Commerce). In this work, we begin describing motivation, goals, and fundamental concepts, in which the proposed model is based. Next, we present related works and a detailed comparative analysis of those projects, deriving the most important features. Later, we propose a model of mobile payment, called 4iPay, based on those features. We detail the 4iPay model, architecture, features, and the technical-scientific proposal of an electronic commerce system in ubiquitous environments. We consider, in the proposed model, the convergence of various related works in terms of ubiquity, unity, universality, and unison. Thus, 4iPay aims at bringing together the best features, innovating and improving in some aspects. In the model, we propose a distinguished solution in terms of architecture, business model, usability, low bandwidth consumption and high performance in payment and receipt transactions. We also consider issues such as device independence, physical location, security and reliability, and other features related to mobile electronic commerce transactions, such as optimizing communications protocols usage and flexibility in local or remote connections. We also present the effective use in scenarios of where and how 4iPay can be applied. For this purpose we present the prototype developed to evaluate the model. Finally, we present the scenarios assessment results, the application performance evaluation and the proposed model acceptance survey.