https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4148 Wed, 29 Apr 2026 15:50:41 GMT 2026-04-29T15:50:41Z https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4521 Title: Digital Validation Framework for Open Badges Authors: Wijeratna, I.K. Abstract: Open Badge is very novelty concept in E-learning domain to motivate the recipients and it could be used as a symbol of the achievement in digital world. This concept is new to e-learning, but this concept is commonly using in a physical world such as Scouts are having badges. Once a person completed a task or a course, a digital badge will be awarded, and it could be used as symbol of achievement. If user gets this badge from well reputed institute/organization, it creates a value to him and could be used as a symbol of certificate. So, this badge concept is implemented in IT industry and it is a one of the newest trends in E-learning. In digital world, this badge also a digital artifact and it uses web page which is link to the badge to show the details of the badge. However, there are several security threats in this concept in digital world such as it could be able to redesign digital badge with same look and feel, create a fraud web pages with fraud information and grant it to someone who has not achieved such. Then it decreases the value and trust of the original badge as well. People don’t trust the digital badge due to this reason and the badge cannot be used for its purpose. People don’t use badges even though it is expected to use. Hence it is a big need to find method to show the originality of the badge and It needs be validated in somehow to overcome above problem. Therefor it is developed the solution to overcome above mentioned problems and this thesis is describing that solution. Further it discusses about how to validate and verify the open badge using existing and well-known technologies because, people who do validate this may or may not be an IT person. Hence It must to find out the most usually use techniques in today’s world and wrap up our mechanism using it. Therefor it proposes a new way of bind information with digital badge and validate the digital details against it. so, it enhances the usability, reliability , security features and it opens the new ways of using it. Previously the Open badge should be used online only or else it is just an image. But with new concept, The Badge could be used in offline mode as well. Because information is bind with the badge itself. People can use it with the CV as an attachment. Nobody can steal the badge and create new badge, if some did it, it would be caught when they try to validate the badge. This is a totally new idea and it will enhance the usability and open a new chapter of open badge in a future. Wed, 11 Aug 2021 00:00:00 GMT https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4521 2021-08-11T00:00:00Z https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4520 Title: Using cryptocurrency along with smart contracts to create a social platform Authors: KULASANGAR, G. Abstract: The common problem in this era, is that the companies or websites which are being utilized by the consumers, or rather the public, have been providing services solely for their own business growths and profits. Which ideally, leaves the customers to limited resources, based on the amount they pay. The community related apps or websites these days, aren’t about contributing and benefitting from or to the community. It’s about entirely receiving the benefits. Hence the motivation towards this research component is that, to create a platform which is entirely decentralized, and any benefits and contributions will be made by the users themselves. The benefits to the customer base would be given in the form of a digital currency. Existing applications which are out there in the world, are pretty much storing the user’s personal data, and holding the ownership of those data. These data are being stored in servers which are spread across the globe, which could be either owned by Google or Apple or Microsoft. The concept of SMART Contract will be utilized as the middleman between all the consumers or users and the application, in order to make sure that the appropriate user is given the relevant privileges to gain or contribute from or to the community. So that the consensus problem is being rectified and makes sure that there won’t be any frauds or manipulations within the community. Having a decentralized application would make sure that the users of the application are aware that their personal information can only be altered by themselves, not by anyone else. So as a proof of study, in order to prove that applications can be built as decentralized so that only the users will be benefited with the services. Along with the increase of population here in Sri Lanka, most of the people do travel by using the public transport, ie. Train, Bus. As an example, most of the people are still struggling to figure out the daily schedule (departure and arrival) and the time duration for a whole journey of a train, which would ideally make every single public’s daily plans even worse. Since the people are quite unsure of the time, when the train would leave or arrive from or to a station, they will have to be at the station way early than normal in order to make sure that they catch the train or either they might get late to reach a destination. Hence, it’s easy for people, if they’re aware well ahead of this, they can decide accordingly. In order to do that, I’m trying to build up a community platform where the users are the public (contributors + non-contributors), and they can contribute to the community in order to earn themselves some benefits from the application. So the platform would be using the Ethereum's Ether, which is a cryptocurrency just like Bitcoin, as the benefit for the user and the core of this platform would be utilizing the concept of Smart Contract which relies on the abstraction of Blockchain which is a decentralized chain which keeps the track of the relevant information of all the users and their relative tokens within the network. Wed, 11 Aug 2021 00:00:00 GMT https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4520 2021-08-11T00:00:00Z https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4442 Title: Automatic Text Summarization for Sinhala Authors: Wimalasuriya, O.S Abstract: According to the people life style, people are surrounded with vast amounts of information albeit with less and less time or ability to make sense of it. Automatic summarization first started as early as in the 1950s.In the modern world due to lack of the time, generating an accurate and intelligent summary for a long document or text pieces has become a popular research as well as an industry problem. This research is carried out to find the suitable approaches to address the above mention issue with minimum linguistic resources. This research proposes a solution for summarizing Sinhala text by identifying the most important and relevant sentences based on linguistic and statistical features of a given text, using an unsupervised extractive summarization approach. In order to generate a better summary, keyword and sentence extraction is manipulated by using a graph based TextRank algorithm. The proposed method was evaluated by comparing the machine generated summaries and human generated summaries based on the assumption that human generated summaries are perfect. The critical evaluation was done by using ROUGE-n and F1 Score to ensure the proposed method usability, performance and efficiency. According to the ROUGE-n values it gives more than 60% of recall rate and more than 42% of precision rate. Further, this research provides a benchmark for future research on Sinhala automatic text summarization. Wed, 04 Aug 2021 00:00:00 GMT https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4442 2021-08-04T00:00:00Z https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4440 Title: Alternative Approach for Authenticating Subflows of Multipath Transmission Control Protocol using Application Level Key Authors: Wijethilake, T. N. B. Abstract: Multipath Transmission Control Protocol (MPTCP) is an extension to Transmission Control Protocol (TCP) proposed by the Internet Engineering Task Force (IETF). The main intention of MPTCP was to use multiple network interfaces in a single network connection simultaneously. MPTCP create multiple TCP connections, which are known as subflows between two hosts. With the use of multiple connections, the throughput of the connection can be improved. Due to the availability of redundant connections, MPTCP can recover from network connection failures efficiently without noticing the application. It is clear that there is a number of advantages related to MPTCP. But researchers have identified that there are a considerable amount of security threats related to the connections initiated by MPTCP. These connections are vulnerable to a number of attacks like DoS attacks, flooding attacks, connection hijacking and so on. MPTCP shares a set of keys when establishing the first connection, also known as the first subflow and use these shared keys to authenticate the next subflows created by the hosts. These keys were in plain text format. One of the main reason for the security vulnerabilities is the exchange of keys in plain text format. A number of solutions were proposed to mitigate these security vulnerabilities. Using an encryption mechanism to secure the keys and changing the header formats are some of them. But this research is inspired by one of the proposed solutions to use external keys to authenticate the subflows. It has proposed to use new socket APIs to obtain the keys from the application level to authenticate the connection. But still, there is no proper implementation of this solution. Therefore as a proof of concept, this research has explored some alternate mechanism to use external keys to authenticate the subflows generated by the MPTCP with minimum modifications to the currently available MPTCP version. It has conducted a number of experiments on top of MPTCP in order to understand the behavior of the protocol, such as configuring of web server with MPTCP and connecting MPTCP enabled client so on. The final outcome of the research has been implemented on the Linux kernel and several experiments were conducted to examine the robustness of the solution, performance. Finally, the solution has evaluated whether the solution has achieved the requirement to use the external keys to authenticate the subflows Wed, 04 Aug 2021 00:00:00 GMT https://dl.ucsc.cmb.ac.lk/jspui/handle/123456789/4440 2021-08-04T00:00:00Z