Financial exclusion is a major developmental problem. Perception has it that financial exclusion emanates from the lack of access to banking and financial services, and the general understanding is that ICT-based access to such services is the solution. In this research, which was undertaken in Ghana, Critical Realism (CR) revealed deeper causes (generative mechanisms) that underlie financial exclusion. The research followed a mixed-method approach. The CR approach guided the research to create an initial model from which hypotheses were deduced and tested; the design science approach, guided the research to create the design theory and an instantiation of an application that uses the design theory; and the quantitative method, was used to evaluate the hypotheses. CR revealed how, in a credit economy, people have a need for credit to pursue business or education opportunities. The generative mechanisms identified have revealed how the credit market for the unbanked includes the reality that a wellfunctioning credit market is self-sustaining with two mechanisms: signalling and adoption. The signalling mechanism facilitates users’ access to credit, which they in turn are able to spend on more services. On the other hand, the adoption mechanism enables the development of more services making the market more valuable, thus attracting more users in a self-feeding loop. The key findings suggest that being banked does not necessarily lead to financial inclusion and financial wellbeing. Transactional banking only serves as an "enrichment agenda for the banks", with minimal benefit to the people. There are also other non-financial technologies such as sharing and social technologies that have an effect on the provision of credit; in addition to their main purpose of saving and/or earning income, for the unbanked, by sharing resources. In Ghana, despite having bank accounts, most of the banked do not use them, because of cost and inappropriate services. This research reveals that the unexamined notion of being banked as a fundamental requirement for financial inclusion may require further investigation. The research has found that the unbanked keeping to themselves and the use of cash creates anonymity and makes them invisible to formal financial institutions, who prefer identity over anonymity, thus contributing to their financial exclusion. The following design needs were identified: inexpensive credit and value-added services such as saving groups, financial accounting services, service to report delinquent customers and education. The research offers a conceptualization of a financial inclusion ICT artefact to draw attention to the multifaceted and complex environment financial inclusion effort is immersed. This calls for an integrated approach since the issues with financial exclusion extend beyond financials and have an effect on the broader society. The research, therefore, proposes a substantive framework for improving the design and development of financial inclusive systems, which helps build trust using obligation transactions. It offers an approach to computing an individual’s financial inclusiveness, which also helps safeguard his/her financial wellbeing. The thesis makes a contribution to Information Systems theory in proposing a framework on financial inclusion using ICT. The contribution to practice is the design of an ICT artefact. / School of Computing / Ph. D. (Computer Science)

The ideas and techniques of cryptography and decentralized storage have seen tremendous growth in many industries, as they have been adopted to improve activities in the organization. That called Blockchain technology, it provides an effective transparency solution. Generally, Blockchain has been used for digital currency or cryptocurrency since its inception. One of the best-known Blockchain protocols is Ethereum, which has invented the smart contract to enable Blockchain’s ability to execute a condition, rather than simply acting as storage. Applications that adopt this technology are called ‘Dapps’ or ‘decentralized applications’. However, there are ongoing arguments about synchronization associated with the system. System synchronization is currently extremely important for applications, because the waiting time for a transaction to be verified can cause dissatisfaction in the user experience. Several studies have revealed that privacy leakage occurs, even though the Blockchain provides a degree of security, as a result of the traditional transaction, which requires approval through an intermediate institution. For instance, a bank needs to process transactions via many constitution parties before receiving the final confirmation, which requires the user to wait for a considerable amount of time. This thesis describes the challenge of transaction synchronization between the user and smart contract, as well as the matter of a privacy strategy for the system and compliance. To approach these two challenges, the first task separates different events and evaluates the results compared to an alternative solution. This is done by testing the smart contract to find the best gas price result, which varies over time. In the Ethereum protocol, gas price is one of the best ways to decrease the transaction time to meet user expectations. The gas price is affected by the code structure and the network. In the smart contract, testing is run based on two cases, and solves platform issues such as runners and user experience and reduces costs. It has also been found that collecting the fee before participating in an auction can prevent the problem of runners. The second case aims to prove that freezing the amount of a bid is the best way to increase the user’s experience, and to achieve the better experience of an online auction. The second challenge mainly focuses on the privacy strategy and risk management for the platform, which involves identifying possible solutions for all risk situations, as well as detecting, forecasting and preventing them. Providing strategies, such as securing the smart contract structure, increasing the encryption method in the database, designing a term sheet and agreement, and authorization, help to prevent system vulnerabilities. Therefore, this research aims to improve and investigate an online auction platform by using a Blockchain smart contract to provide evocative user experiences. / Idéer och tekniker för kryptografi och decentraliserad lagring har haft en enorm tillväxt i många branscher, eftersom de har antagits för att förbättra verksamheten i organisationen. Den som kallas Blockchain-tekniken ger den en effektiv transparenslösning. Generellt har Blockchain använts för digital valuta eller cryptocurrency sedan starten. Ett av de mest kända Blockchainprotokollen är Ethereum, som har uppfunnit det smarta kontraktet för att möjliggöra Blockchains förmåga att utföra ett villkor, snarare än att bara fungera som lagring. Applikationer som använder denna teknik kallas 'Dapps' eller 'decentraliserade applikationer'. Det finns emellertid pågående argument om synkronisering associerad med systemet. Systemsynkronisering är för närvarande oerhört viktigt för applikationer, eftersom väntetiden för att en transaktion ska verifieras kan orsaka missnöje i användarupplevelsen. Flera studier har visat att sekretessläckage inträffar, även om Blockchain ger en viss säkerhet, till följd av den traditionella transaktionen, som kräver godkännande genom en mellaninstitution. Till exempel måste en bank bearbeta transaktioner via många konstitutionspartier innan den får den slutliga bekräftelsen, vilket kräver att användaren väntar en betydande tid. Den här avhandlingen beskriver utmaningen med transaktionssynkronisering mellan användaren och smart kontrakt, samt frågan om en sekretessstrategi för systemet och efterlevnad. För att närma sig dessa två utmaningar separerar den första uppgiften olika händelser och utvärderar resultaten jämfört med en alternativ lösning. Detta görs genom att testa det smarta kontraktet för att hitta det bästa gasprisresultatet, som varierar över tiden. I Ethereum-protokollet är gaspriset ett av de bästa sätten att minska transaktionstiden för att möta användarens förväntningar. Gaspriset påverkas av kodstrukturen och nätverket. I det smarta kontraktet körs test baserat på två fall och löser plattformsproblem som löpare och användarupplevelse och minskar kostnaderna. Det har också visat sig att insamlingen av avgiften innan du deltar i en auktion kan förhindra löparproblemet. Det andra fallet syftar till att bevisa att frysning av budbeloppet är det bästa sättet att öka användarens upplevelse och att uppnå en bättre upplevelse av en online auktion. Den andra utmaningen fokuserar huvudsakligen på sekretessstrategin och riskhanteringen för plattformen, som innebär att identifiera möjliga lösningar för alla risksituationer, samt att upptäcka, förutse och förhindra dem. Tillhandahållande av strategier, som att säkra den smarta kontraktsstrukturen, öka krypteringsmetoden i databasen, utforma ett termblad och avtal och godkännande, hjälper till att förhindra systemets sårbarheter. Därför syftar denna forskning till att förbättra och undersöka en online-auktionsplattform genom att använda ett smart avtal med Blockchain för att ge upplevande användarupplevelser.

Uppsatsens språk är svenska. Idag är det svenska samhället nästintill kontantlöst och utvecklingen hit har gått fort. Med anledning av digitaliseringen och statens potentiellt förändrade ställning på betalningsmarknaden har Riksbanken undersökt möjligheter samt påbörjat utvecklingen av en egen centralbanksutgiven digital valuta kallad e-krona. Syftet med studien är att undersöka om och hur ett införande av e-krona som betalmedel främjar hållbar finansiell utveckling baserat på vilka möjligheter samt risker som kan uppstå utifrån ett banksektorperspektiv. Studien är kvalitativ och består av finansiell teori tillsammans med nio semistrukturerade intervjuer som genomförts för att nå syftet. Dessa har gjorts med utvalda experter som är eller har varit verksamma inom affärsbanker, Riksbanken, Finansinspektionen och Fintech-bolag. Studien finner att e-kronan kan stärka den finansiella stabiliteten och bibehålla värdeförhållandet mellan pengar. Dessutom identifieras risker med e-kronan där höga kostnader ses som en väsentlig del tillsammans med spekulation och informationsasymmetri. Studien har också visat på resultat att e-kronan kan bidra med innovation och teknikutveckling vilket ses som betydande möjligheter. En central slutats är att e-kronan kan främja hållbar utveckling om utformningen tillåter den att beakta de fyra grundpelarna till hållbar finansiell utveckling, men att det beror på ur den kan komma att utformas. / This study is written in Swedish. Today, the Swedish society is nearly cashless and the progression towards this has been rapid. Due to digitization and the state's potentially changed position on the payment market, the Riksbanken has investigated possibilities and initiated the development of its own central bank-issued digital currency called e-krona. The aim of the study is to investigate whether and how the introduction of the e-krona as a means of payment, promotes sustainable financial development based on the opportunities and risks that may arise from the perspective of the banking sector. The study is qualitative and consists of financial theory together with nine semi-structured interviews that have been conducted to achieve its purpose. The interviewees consist of selected experts who are or have been active in commercial banks, the Riksbanken, the Finansinspektionen and Fintech organizations. The study finds that the e-krona can strengthen financial stability and maintain the value ratio between money. In addition, risks are identified with the e-krona where large costs are seen as an essential part together with speculation and information asymmetry. The study has also resulted in the e-krona being able to contribute with innovation and technology development, which are seen as significant opportunities. A central conclusion is that the e-krona can promote sustainable development if the design allows it to take into account the four pillars of sustainable financial development, but that this depends on how it will be designed.

<div>Graph-structured data is pervasive. Modeling large-scale network-structured datasets require graph processing and management systems such as graph databases. Further, the analysis of graph-structured data often necessitates bulk downloads/uploads from/to the cloud or edge nodes. Unfortunately, experience has shown that malicious actors can compromise the confidentiality of highly-sensitive data stored in the cloud or shared nodes, even in an encrypted form. For particular use cases —multi-modal knowledge graphs, electronic health records, finance— network-structured datasets can be highly sensitive and require auditability, authentication, integrity protection, and privacy-preserving computation in a controlled and trusted environment, i.e., the traditional cloud computation is not suitable for these use cases. Similarly, many modern applications utilize a "shared, replicated database" approach to provide accountability and traceability. Those applications often suffer from significant privacy issues because every node in the network can access a copy of relevant contract code and data to guarantee the integrity of transactions and reach consensus, even in the presence of malicious actors.</div><div><br></div><div>This dissertation proposes breaking from the traditional cloud computation model, and instead ship certified pre-approved trusted code closer to the data to protect graph-structured data confidentiality. Further, our technique runs in a controlled environment in a trusted data owner node and provides proof of correct code execution. This computation can be audited in the future and provides the building block to automate a variety of real use cases that require preserving data ownership. This project utilizes trusted execution environments (TEEs) but does not rely solely on TEE's architecture to provide privacy for data and code. We thoughtfully examine the drawbacks of using trusted execution environments in cloud environments. Similarly, we analyze the privacy challenges exposed by the use of blockchain technologies to provide accountability and traceability.</div><div><br></div><div>First, we propose AGAPECert, an Auditable, Generalized, Automated, Privacy-Enabling, Certification framework capable of performing auditable computation on private graph-structured data and reporting real-time aggregate certification status without disclosing underlying private graph-structured data. AGAPECert utilizes a novel mix of trusted execution environments, blockchain technologies, and a real-time graph-based API standard to provide automated, oblivious, and auditable certification. This dissertation includes the invention of two core concepts that provide accountability, data provenance, and automation for the certification process: Oblivious Smart Contracts and Private Automated Certifications. Second, we contribute an auditable and integrity-preserving graph processing model called AuditGraph.io. AuditGraph.io utilizes a unique block-based layout and a multi-modal knowledge graph, potentially improving access locality, encryption, and integrity of highly-sensitive graph-structured data. Third, we contribute a unique data store and compute engine that facilitates the analysis and presentation of graph-structured data, i.e., TruenoDB. TruenoDB offers better throughput than the state-of-the-art. Finally, this dissertation proposes integrity-preserving streaming frameworks at the edge of the network with a personalized graph-based object lookup.</div>

For the past decades, the Swedish public’s payment habits have changed, where the majority of the public has abandoned the old way of making payments, using cash, and instead opted for more modern payment solutions, digital money. The difference between cash and digital money is that cash is physical and only issued by the Riksbank, whereas digital money is created by and stored on accounts at commercial banks. The question of what role the state should have on the payment market is an important point of discussion. But it is not categorically a new question; the Swedish government is tackling essentially the same problem today as it has been doing many times before. Today’s problem is to some extent however manifested in a different way. During the 20th century, discussions were held whether or not the Riksbank should have the exclusive right to issue banknotes. It was considered unnecessary, inappropriate and dangerous. The idea that the Riksbank could cover the entire economy’s need for banknotes was, according to the commercial banks, unreasonable. Nonetheless, in 1904 the exclusive right became fait accompli; the government intervened and gave the Riksbank the banknote monopoly. We are now finding ourselves facing a similar situation, where there is a difference of opinion regarding the Riksbank’s role on the payment market. It is therefore nothing new, but rather an expected task for the government, and thus the central bank, to analyze major changes and draw conclusions from them. The problem is essentially about cash being phased out by digital means of payment. In order to therefore solve the problem, the Riksbank has started a project to investigate whether or not the Riksbank should issue digital cash to the Swedish public, what the Riksbank calls an e-krona. To introduce an e-krona would be a major step, but for the public to not have access to a government alternative, seeing as cash usage is declining, is also a major step. No decision has been made yet regarding whether the e-krona will be introduced on the market or not. A decision that however has been made, is that the Riksbank is now working on building an e-krona to develop and assess the technique. Nonetheless, an introduction would undoubtedly have consequences for both the Riksbank and the commercial banks, which ultimately means it would have effects on the economy as a whole. What about regulatory aspects; is the Riksbank even allowed to issue an e-krona under current legislation? The answer is affirmative, to a certain extent. There are furthermore many other uncertainties regarding how an e-krona would affect the economy; the Riksbank does not fully answer many of the system issues in its project reports. The question of whether or not it even is up to the Riksbank to make a decision on the matter of an introduction is also questioned by the author in the thesis.