This thesis is focused on Bitcoin forensic analysis. Main goal of this thesis was to design and implement system tool for forensic analysis. Theoretical part of this thesis is dedicated to Bitcoin network. Requirements and existing tools are described in following chapters. Rest of the thesis is concerned about implementation of such a tool itself. Implemented system is presented as web application, which allows user to search through blockchain, vizualize financials, display profile pages of Bitcoin users and their Bitcoin wallets.

This independent work includes refactoring a website application. In simpler sense, it means modernizing existing code by increasing its quality and making it more understandable; to exchange old knowledge of methods and concepts into something that is more relevant to its time. This refactoring has also meant to transform the UI into something that is more appealing, and more userfriendly. The website that has gone through the refactoring is Nordyr (”https://nordyr.com/”). Nordyr is a Nordic Film & Series Database that shares information about Nordic films and tv-series, and everyone involved. They also offer social tools such as user profiles and various tools to simplify the exploration and interaction between Nordic movies and consumers. This was made possible by using vanilla PHP, JavaScript/jQuery, and the MariaDB database for information storage and management. The implementation of the refactoring meant retaining PHP for the backend, but applying the Laravel framework, and likewise for JavaScript, but applying ReactJS (a powerful JavaScript library). Nordyr retains MariaDB for its information storage and management, however, its SQL queries have been adapted to Laravel’s query-builder and Eloquent ORM, which means that the majority of SQL queries have been rewritten and the majority of data tables are now represented by models. The restructuring of Nordyr has shown that the website now has the ability to scale better, and the development environment will also be more pleasant for those involved. / Det här självständiga arbetet har innefattat att omstrukturera en hemsida. Det innebär i enklare mening att modernisera kod och öka dess kvalité; att byta ut äldre kunskaper om metoder och koncept till något som anses vara av mer relevans för sin tid. Refaktoreringen har också inneburit att dess UI gjorts om till att bli mer tilltalande och användarvänlig. Hemsidan som gått igenom refaktoreringen är Nordyr (”https://nordyr.com/”). Nordyr är en Nordisk Film- & Serie-databas som delar information om nordiska filmer och tv-serier och alla inblandade. De erbjuder även sociala verktyg som användarprofiler och diverse verktyg för att förenkla upptäckandet och interaktionen mellan nordiska titlar och konsumenter. Detta gjordes möjligt med hjälp av vanilj PHP, JavaScript/jQuery, och databasen MariaDB för informationslagring och hantering. Genomförandet av refaktoreringen innebar att behålla PHP för backend men tillämpa ramverket Laravel, och likaså för frontend, JavaScript stod kvar men ReactJS (”JavaScript bibliotek”) tillämpades. Nordyr behåller MariaDB, men dess förfrågningar i SQL har anpassats till Laravels query-builder och Eloquent ORM, vilket innebar att majoriteten av SQL frågor skrivits om och majoriteten av tabeller representeras nu av modeller (”Models”). Omstruktureringen av Nordyr har visat på att hemsidan nu har förmågan att skala bättre, och utvecklingsmiljön kommer även bli mer behaglig för de inblandade.

This master thesis deals with the topic of risk management and explains its importance during project management in IT projects. It descibes every phase of the risk management life cycle and also methods and procedures used in each phase. After that the thesis focuses on decision analysis, mainly on decision trees and Monte Carlo simulation. The last part contains the design of an application for risk management and visualization. Prototype of this system has been implemented based on this design in PHP framework Laravel. Details of the implementation and testing are in the next part of this thesis. In the end there is an assessment with discussion of possible expansions.

The goal of this thesis is to explore existing solutions of closed and open data sharing, propose options of sharing non-public data, implement selected solution and demonstrate the functionality of the system for sharing closed data. Implementation output consist of a catalog of non-public datasets, web application for administration of non-public datasets, application interface gateway and demonstration application.