Abstract: To create a lottery based smart contract on ethereum blockchain for increasing transparency and reduce frauds in the lottery industry. Once the contract has been deployed by the administrator, there will be a minimum contribution amount for players to register in the game and a price pool will be maintained by the smart contract. The winning process will be structured in a way such that only the administrator's wallet will be authorized to initiate the process to randomly pick an address and the smart contract will by definition transfer the prize to the winner. The contract once deployed on blockchain cannot be changed by the administrator to maintain transparency and fairness. Keywords: Smart contract, lottery system, application of ethereum, blockchain technology.
Tejas Sawant, Pritamsunder Idayakumar, Amit Sabkale, Kalyani Pampattiwar
Traditionally the health records of the patient are stored in a hospital database and the hospital administration or the healthcare provider generally retain access to this medical data. The health records of patients are scattered among different hospitals. Hence, it becomes difficult to access the historical data of the patient when needed. These results are delayed and possibly incomplete data provided by the patient to their doctor. These flaws can be overcome by the implementation of an Electronic Health Record (EHR) system. Blockchain provides a decentralized platform for storing and accessing EHR, which is almost impossible to tamper with. Every user in the network acts as a node and has a ledger that stores all the data, which means the possibility of a loss of data is extremely low. Our work aims to simplify the accessing and managing of patients’ historical medical records using a decentralized application and blockchain technology.
R. Aditya Rayhan Zanesty, Tio Arya Dewa Prakarsa, Intania Chantika Alina, Nur Aini Rakhmawati
Cryptocurrency is increasingly showing its popularity as an investment medium that is increasingly taking the attention of the Indonesian people, both common people and experts. This phenomenon is prone to market manipulation by pumping and dumping certain cryptocurrency entities, trapping novice investors. The respondents of this study were taken from Indonesian people who have cryptocurrencies and social media users. The method used in this study is a descriptive quantitative research method with a total of 151 respondents. The data instrument used in this study was a questionnaire distributed online. The results obtained through surveys that have been conducted prove that social media influencers have a positive and significant influence on Indonesian people's cryptocurrency purchasing decisions.
Robin Singh Bhadoria, Akshat Goyal, Arka Prabha Das, Abul Bashar · 5 authors
The blockchain has been considered to be a breakthrough technology solution for problems based on security aspects. It is a Distributed Ledger Technology (DLT) which can be used to established trust among different trustless entities or nodes present in the network. Furthermore, Quick Response (QR) Codes are likewise one of the most promising innovations going on in the markets. In QR code, small dots are present which get converted to binary numbers and get validated with error correcting algorithms. Hence, QR codes are beneficial for both storage and authentication. In this article, we discuss the prospects of combination of these two technologies for better results. In this paper, we aim to develop permission-less Blockchain, which is relatively easier to compute and have shown to increase its data capacity. It also endeavored to add the QR Code incorporation to a block and make it more scalable with considering the limited space in a such block.
Ahlam Ansari, Hatim Shabbir Bohra, Daanish Kathi, Ghufran Ahmad Khan
Blockchain is a distributed ledger technology which aids in recording transaction and tracking capital in any business network. The main feature of blockchain is transparency. Our project is going to help these banks because we will be implementing blockchain ledger for creating a banking system in Linux. Blockchain will boost trust, security, translucence, and the traceability of data shared across a banking system and will be cost saving with new efficiencies. Because it provides rapid, shareable, and entirely clear information recorded on an immutable ledger that can only be viewed by authorised network users, blockchain is the ideal option for distributing data. This network can locate orders, capital, users, creations, and much more, and because participants share only one view of transparency, you can see all the details of a capital transaction from beginning to end, providing you with a greater sense of trust as well as new efficiencies and opportunities. Banking systems are transferring from their older methods to more recent ledger methods. Banking sector has started experimenting with blockchain ledger by copying current asset transactions on the blockchain. This enables the banking sector to have some space for the effectiveness of the blockchain solution. In infrastructure terms, Blockchain is software that is open source designed to support the transfer of digital capital among market participants in real time. Using any chosen blockchain APIs, one may exhibit big decrease in asset transfer costs and timelines. Today's banks are developing and operating their business models with the help of a trusted third-party service provider. As a result, Blockchain technology will be able to reconstruct the banking model since it can handle transaction records via a peer-to-peer network between trading partners without the need for a trusted third party.
Being developed from traditional construction to smart resource sharing system, libraries are committed to create a sound content sharing infrastructure beyond the walls. Blockchain supports the certainty of resources ownership and access. This paper presents a blockchain based smart library management system for online sharing of data. The system eradicates the chances of tampering as well as unauthorized accessing the data by introducing a unique and secure accessing mechanism with blockchain technology. The proposed framework is able to provide the secure access to database without any load and access from any location.
BACKGROUND: COVID-19 is an ongoing global pandemic caused by SARS-CoV-2. As of June 2021, 5 emergency vaccines were available for COVID-19 prevention, and with the improvement of vaccination rates and the resumption of activities in each country, verification of vaccination has become an important issue. Currently, in most areas, vaccination and reverse transcription polymerase chain reaction (RT-PCR) test results are certified and validated on paper. This leads to the problem of counterfeit documents. Therefore, a global vaccination record is needed. OBJECTIVE: The main objective of this study is to design a vaccine passport (VP) validation system based on a general blockchain architecture for international use in a simulated environment. With decentralized characteristics, the system is expected to have the advantages of low cost, high interoperability, effectiveness, security, and verifiability through blockchain architecture. METHODS: The blockchain decentralized mechanism was used to build an open and anticounterfeiting information platform for VPs. The contents of a vaccination card are recorded according to international Fast Healthcare Interoperability Resource (FHIR) standards, and blockchain smart contracts (SCs) are used for authorization and authentication to achieve hierarchical management of various international hospitals and people receiving injections. The blockchain stores an encrypted vaccination path managed by the user who manages the private key. The blockchain uses the proof-of-authority (PoA) public chain and can access all information through the specified chain. This will achieve the goal of keeping development costs low and streamlining vaccine transit management so that countries in different economies can use them. RESULTS: The openness of the blockchain helps to create transparency and data accuracy. This blockchain architecture contains a total of 3 entities. All approvals are published on Open Ledger. Smart certificates enable authorization and authentication, and encryption and decryption mechanisms guarantee data protection. This proof of concept demonstrates the design of blockchain architecture, which can achieve accurate global VP verification at an affordable price. In this study, an actual VP case was established and demonstrated. An open blockchain, an individually approved certification mechanism, and an international standard vaccination record were introduced. CONCLUSIONS: Blockchain architecture can be used to build a viable international VP authentication process with the advantages of low cost, high interoperability, effectiveness, security, and verifiability.
<span>learning process implemented in universities due to COVID-19 has brought significant disruption to education. Interest and motivation to learn are very important in the learning process. It takes a platform that supports students to be motivated in running the activity hours well. Learning techniques that can be chosen are collaborative and creative learning in achieving effective graduate outcomes with the support of the Merdeka Campus program. This research aims to make gamification techniques to make students more creative, innovative, and interactive by utilizing the concepts of learning and playing. Furthermore, a learning platform based on blockchain technology can support quality universities as a layer of control in implementing security and fun learning. With gamification techniques in collaboration with blockchain technology, all devices connected to the network will become nodes or servers. This study uses agile development methods based on iterative and incremental models to create a distributed storage blockchain algorithm, and IPFS used to build the GamiChain iLearning education model (gamification blockchain). It can be concluded that GamiChain (gamification blockchain) can support the Merdeka Campus program, which can provide facilities for students to develop their potential and prepare excellent and outstanding graduates.</span>
Abstract New technological developments, such as 5G networks, smart and interconnected devices, and the development of the Internet of Things (IoT), lead to a new reality in which the secure flow of data is non-negotiable. In this new reality, blockchain technology can play a crucial role, as it has the ability to provide the necessary background for the safe and inviolable operation of systems. Blockchain is a distributed ledger, in which information and data are stored and verified. These blocks of data do not have to be related to financial transactions but may concern any other type of data that needs to be securely recorded and not changed retrospectively. Although the first application of blockchain technology was about digital currency (Bitcoin), its usefulness is not limited to cryptocurrencies or the field of economics. Blockchain, especially in its last stage v3.0, has many applications in various sectors such as data storage, certification of products and services, government, insurance, health, science, and education. This paper focuses on the current and potential educational applications of blockchain and presents how this technology can be used to solve specific education problems. Nowadays, a variety of blockchain applications concerning the issue and storage of certificates and diplomas, the evaluation of learning outcomes, the support and the academic degree management, the protection of intellectual property, the cooperation between students and their professors, learning accreditation, payment for studies, formation of an academic passport (portfolio) or administration of the educational process are implemented in some HEI and institutions. The paper analyzes the features and advantages of blockchain technology, presents some of the current blockchain applications for education, as well as the benefits and challenges of using blockchain technology in the educational sector. Finally, special reference is made to applications related to the field of language learning.
Gautam Gajra, Omkar Ghadge, Yash Gandhi, Prof. Devita Durge
Abstract: Developing a protected electronic voting system that gives the decency and security of a current voting system, while providing the accuracy and flexibility offered by electronic systems, has been a test for quite a while. Use of blockchain as an assist to actualize disseminated digital balloting structures is accessed. At the present, neither civilians nor elected leaders have favoured conventional ballots. Elections are surrounded via way of means of vote falsification, bribery and different vote casting problems paper and polling shape balloting a ballot system, the checking of vote's takes hours and the number of the time days and hardly ever any activities reduce to rubble the effects through distinctive feature of human or machine. There needs to be an awesome function of current technology to improve the prevailing system. Blunder, which brings about the process taking much more. Blockchain innovation offers a fact in which that character flaw is eliminated from the situation and votes are checked proper away. Blockchain generation is the only one that handles the real vote. We use the stable hash set of rules for resolving this trouble and attempted to convey an answer via using this booming generation. The system based on blockchain will be safe, trustworthy, and private. It will help to realize the general remember of the applicants who participated and its capabilities inside the equal manner as people's religion of their governments does. The citizens and political selection executives can get sizable benefits from the voting poll programming application. And yet, e-vote casting a poll gives large risks to political race safety and honesty and modifications the concept of political selection straightforwardness and investigation. E-Voting has a Relatively bit of freedom; at the cease of the day, Relative Advantage is degree while an improvement is regarded as advanced to the past one; Since, e-Voting is advanced to the guide vote casting system. Keywords: Blockchain, E-voting, Security, Smart Contracts, Immutable
The COVID-19 outbreak had a severe impact on almost all countries in the world. One aspect of concern during the pandemic is an investment. In this study, the GARCH model used to estimate Value at Risk (VaR) on cryptocurrency investments as a tolerable loss during the COVID-19 pandemic. Data in this study are ten cryptocurrencies with the largest capitalization. The observation period when WHO declared COVID-19 as a pandemic, namely on March 11, 2020 - June 11, 2020. From this study, the highest cryptocurrency VaR value is Crypto.com with an amount of 0,18214. It means that the maximum loss that an investor can tolerate with an investment of $500.000.000 for a 95 percent confidence level is $ 91.070.392.
Omkar Sunil Naiknavare, Mr. Mandar Pravin Patil, Miss. Riya Chandrakant Chawate, Miss. Amisha Bharat Borana · 5 authors
Abstract: Non-governmental organizations (NGOs) in under-developed countries are receiving funds from donor agencies for various purposes, including relief from natural disasters and other emergencies, promoting education, women empowerment, economic development, and many more. Some donor agencies have lost their trust in NGOs in under-developed countries, as some NGOs have been involved in the misuse of funds. This is evident from irregularities in the records. For instance, in education funds, on some occasions, the same student has appeared in the records of multiple NGOs as a beneficiary, when in fact, a maximum of one NGO could be paying for a particular beneficiary. Therefore, the number of actual beneficiaries would be smaller than the number of claimed beneficiaries. This research proposes a blockchain-based solution to ensure trust between donor agencies from all over the world, and NGOs in under-developed countries. The list of National IDs along with other keys would be available publicly on a blockchain. The distributed software would ensure that the same set of keys are not entered twice in this blockchain, preventing the problem highlighted above. The details of the fund provided to the student would also be available on the blockchain and would be encrypted and digitally signed by the NGOs. In the case that a record inserted into this blockchain is discovered to be fake, this research provides a way to cancel that record. A cancellation record is inserted, only if it is digitally signed by the relevant donor agency. Keywords: blockchain; ensuring trust; NGOs; encryption
In this digital world, information technology is growing day by day. Due to this, a large amount of data is generated every day from various domains, and one of the domains is medical health records. A large amount of medical data is generated every day. Such as electronic medical records, medical images, diagnostic reports, X-rays, MRI scans, etc. These medical records can help in treating a patient when needed and can be shared with different medical institutions. There are systems built that are used to store all the medical records of patients. But they are centralized and may not be secured, and a user may not know how and where these records are shared. However, if these medical records are leaked or shared with a third party, the owner of that medical record may not know how and where these medical records are used, thus sabotaging the patient's privacy. Therefore, controlling the access rights to medical data is an urgent issue. On the other hand, patients do not have any proper application that will help them store and view their history of medical records and have control over them. This project aims to build a decentralized application to store the medical records of patients on the Ethereum Blockchain and Inter Planetary File System (IPFS). This app will help users to keep electronic medical records in one place, and the user will have full control over their data. This app will help doctors diagnose the patients by seeing their medical history. This will also help researchers to research various diseases. This app will store the data of patients from doctors and pathology labs. Users will be able to control who can add the medical details and see them. They can give access and revoke it. This application will store the file in DICOM, JPEG, JPG, PNG, and PDF format. In this application, there is no centralized authority. This application is secured because of peer-to-peer and distributed networks, it is tamper-proof. User has control over their data. They can choose whom to share their data with, and blockchain is reliable.
The presence of bitcoin invites many uncertainties, such as concerning its legality and the statement that bitcoin is not an official currency in Indonesia. Objective: This research aims to analyze the bitcoins in the perspective of the Islamic Law. Method: This research uses the literature review method. The literary materials obtained are in the form of scientific papers, online media, books, etc. that concerns the analyzed object. Findings: The circulation of bitcoin in Indonesia as a medium of exchange cannot be regarded as a currency, as it does not fulfill the terms and conditions for something to be called money. The bitcoin’s function does not commensurate with the function of money in the concept of the Islamic economy, as it tends to be a traded commodity rather than a facility of transactional exchange. In the perspective of Islamic law, the speculative use of bitcoins may bring one to the risk of violating the law on gharar (uncertainty, hazard); dharar (a transaction that may bring loss to a party); and qimar (game of chance). No authority guarantees bitcoins, and this causes harm. In conclusion, bitcoins produce more harm than good. Thus, its usage is prohibited by Islamic law. Function: This research provides an explanation of the legality of bitcoins, that may aid the Indonesian society to decide whether or not they can use bitcoins according to the law and th sharia. Novelty: There has not been any researches that study the same topic as that discussed in this article.
Asha Sharma, Shurveer S. Bhanawat, Raj Bahadur Sharma
Accounting has always been influenced by digital technology, although most of it has been replacing analogue instruments with digital versions. A blockchain is a digital ledger that is used to record transactions between different participants in a network. It is an internet-based, peer-to-peer distributed ledger that contains all transactions since its inception. Blockchain technology has the potential to revolutionize the world humanity implementing in the business based on the concept of transmitting valuable digital assets like bitcoin without the need of a third-party intermediary. Blockchain is considered as a type of database or a sort of digital ledger, which is widely used by many financial organizations. It's a distributed ledger which keeps records of immutable and verifiable data. This blockchain technology permits decentralized ledger transactions to be produced without the intervention of a third party. Because of its decentralization, networks have a high degree of protection. The aim of the study is to investigate various decisions making factors, affecting in adopting blockchain technology in the field of accounting. The result showed that secure and private, transparent and auditable, immutable, better transparency, reduce cost, transparency, real-time transaction, and flexible are most likely influencing factors in adoption of blockchain technology. The result indicates that the Quorum, Sap Hana, and Ethereum, platforms are most consistent and trusted platforms for block chain technology and the blockchain platforms are found most suitable, secured and stronger platform. Received: 25 October 2021 / Accepted: 2 February 2022 / Published: 5 March 2022
Khairunnisa Harahap, Tuti Anggraini, Asmuni Asmuni
Cryptocurrency dapat digunakan sebagai alat pembayaran, Investasi, maupun Trading. Beberapa jenis Cryptocurrency selain Bitcoin juga banyak digunakan. Pro dan kontra di masyarakat terjadi akibat perbedaan pendapat mengenai Cryptocurrency. Karena belum ada legalitas mengenai Cryptocurrency sebagai alat pembayaran maupun mata uang yang diakui di Indonesia. Harganya yang Fluktuatif serta keamanannya yang masih terdapat cela membuat perdebatan mengenai Cryptocurrency seperti pada Bitcoin belum mencapai titik terang. Dalam Perspektif hukum islam, sebagian Ulama berpendapat bahwa bentuk mata uang digital ini tidak mempunyai kejelasan dan tidak dapat dilihat fisiknya memungkinkan terjadinya penipuan menjadikan Cryptocurrency mengandung unsur Gharar. Kemudian penggunaan Cryptocurrency dalam Investasi maupun Trading menjadikannya tidak lepas dari spekulasi mengenai harganya yang sangat Fluktuatif dan hanya digunakan sebagai alat untung rugi maka Cryptocurrency mengandung unsur Maysir. Karena urgensi mata uang Kripto ini sangat luas terutama dalam cakupan teknologi dan ekonomi
Zaffar Ahmed Shaikh, Abdullah Ayub Khan, Лаура Байтенова, Gulmira Zambinova · 8 authors
This paper proposes a novel and secure blockchain hyperledger sawtooth-enabled consortium analytical model for smart educational accreditation credential evaluation. Indeed, candidate academic credentials are generated, verified, and validated by the universities and transmitted to the Higher Education Department (HED). The objective is to enable the procedure of credential verification and analyze tamper-proof forged records before validation. For this reason, we designed and created an accreditation analytical model to investigate individual collected credentials from universities and examine candidates’ records of credibility using machine learning techniques and maintain all these aspects of analysis and addresses in the distributed storage with a secure hash-encryption (SHA-256) blockchain consortium network, which runs on a peer-to-peer (P2P) structure. In this proposed analytical model, we deployed a blockchain distributed mechanism to investigate the examiner and analyst processes of accreditation credential protection and storage criteria, which are referred to as chaincodes or smart contracts. These chaincodes automate the distributed credential schedule, generation, verification, validation, and monitoring of the overall model nodes’ transactions. The chaincodes include candidate registration with the associated university (candidateReg()), certificate-related accreditation credentials update (CIssuanceTrans()), and every node’s transactions preservation in the immutable storage (ULedgerAV()) for further investigations. This model simulates the educational benchmark dataset. The result shows the merit of our model. Through extensive simulations, the blockchain-enabled analytical model provides robust performance in terms of credential management and accreditation credibility problems.
The status of the money-prospects of cryptocurrencies in both conventional and Shari’ah based literature remains hotly debated and largely indecisive. We apply/used the bibliometric approach to review the literature on/regarding the money-prospects of cryptocurrencies. We selected 264 articles published during the years 2011-2021 from Web of Science (WoS) through systematic screening to explore their influential and intellectual aspects. Bibliometric citation analysis was conducted to present/identify influential research categories, leading authors, top articles, prominent countries, and major journals within the sample. We also highlighted the trend of annual scientific production to show sustained growth in the area under research. Furthermore, keyword analysis and bibliometric coupling analysis were applied/carried out to generate networks to highlight the intellectual aspects of the money-prospects of cryptocurrencies. We used the networks of emerging themes and main clusters to conduct content analysis further. We included and reviewed studies which discussed the money-prospects of cryptocurrencies in the light of Shari’ah precepts in relevant clusters. We also identified potential future research areas (cluster-wise). Theis study helps the researchers to understand the evolution, dimensions, and emerging themes regarding the money-prospects of cryptocurrencies.
Williams Kwasi Peprah, Reynaldo P. Abas, Akwasi Ampofo
Blockchain technologyis a distributed, unchangeable ledger that makes recording transactions and managing assets in a business network much easier and nowa type of accountingsoftwareconcernedwith the transfer of assetownership and the maintenanceof anaccuratefinancial ledger. Despitethenumerousbenefits ofblockchaintechnology,there is no study on theapplicability of blockchain technologytothenormalaccountingcycle in emerging economies in Africa.Thus,thispaperprovidesgeneralinsightsonhowblockchaintechnologymaybeusedinthenormalaccountingcycle in West Africa.Thestudyadoptedaqualitativeresearchmethodandcontentanalysisresearchdesigntounderstand the extent to which business leaders in West Africa are aware, understand, and utilize blockchain technology in the processing of accounting transactions to the preparation of financial statements.Results indicatethat West African business leaders are well aware, understand and applyblockchaintechnologyapplicationsinthenormalaccountingcycle,anditprovidescostsavings,digitalidentity,andsecurity.Thestudyrecommendsfurtherinvestigationsintohowtoaddressscalabilitywhen dealingwith recurrent and large transactions.
Anton M. Anton Permana, Carty Irawan, Dede Sukmawan
Penelitian ini dilatarbelakangi oleh perdebatan instrumen investasi mana yang terbaik, yaitu Saham atau Cryptocurrency. Tujuan penelitian ini dilakukan untuk mencari tahu strategi mana yang optimal untuk kedua permasalahan tersebut menggunakan Game Theory. Dataset dikumpulkan melalui Google Form yang disebarkan di grup Telegram dan Facebook Saham dan Cryptocurrency. Sebelum dianalisa dengan Game Theory dilakukan harus sudah melalui Uji Validitas dan Uji Reliabilitas agar mengetahui strategi mana yang tidak valid. Setelah dilakukannya analisis ditemukan hasil dengan menggunakan Strategi Murni, yang dimana diambil 2 sudut pandang, yaitu Saham yang diunggulkan dan Crypto yang diunggulkan. Maka dengan penelitian ini, dapat terjawab strategi mana yang terbaik untuk kedua jenis instrumen investasi tersebut.
Meet Dave, Kaustubh R. Patil, Rounak Jaiswal, Renuka Pawar
In the last two decades, the global value of pharmaceutical goods traded increased by six times. As a result of this growth, the pharmaceutical supply chains have become more complicated and ambiguous. The number of counterfeit drug-related incidents have also increased. Counterfeit drugs when consumed can have adverse effects on individuals and sometimes can even lead to death. The solution to this problem is leveraging blockchain technology. The paper proposes a supply chain management system using a permissioned blockchain network which will consist of role-based authorization to avoid tampering with the data available in the network. The blockchain-based decentralized solution will help to improve collaboration and trust issues by minimizing the consequences caused by information asymmetry by introducing transparency, traceability, and consistency of all the item units.
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<p>Sertifikat merupakan sebuah bentuk penghargaan yang didapat seseorang setelah menyelesaikan suatu uji kompetensi atau pembelajaran tertentu. Sertifikat harus dibuat dan disimpan dengan metode dan keamanan yang baik untuk mencegah terjadinya perubahan isi atau bahkan pemalsuan. Teknologi blockchain merupakan teknologi yang memungkinkan proses penyimpanan yang aman dengan ongkos yang rendah. Keamanan terjamin karena semua orang bisa mengambil bagian untuk menyimpan data dengan ledger yang terdistribusi. Berdasarkan hasil penelitian dan perancangan sistem yang dibuat dapat disimpulkan bahwa proses pembuatan teknologi blockchain sebagai media penerbitan sertifikat dan validasinya dapat dibuat menggunakan program milik Ethereum yaitu Geth dan penyimpanan data menggunakan smart contract yang diterbitkan pada jaringan blockchain. Hasil dari pengujian reliabilitas terhadap sistem menunjukkan bahwa bahwa sistem berhasil memproses 200 transaksi dalam waktu kurang lebih 8 detik. Untuk pengujian skalabilitas didapatkan estimasi 10 juta blok membutuhkan kapasitas penyimpanan sebesar 22,6 GB untuk menjadi node atau miner pada jaringan blockchain ini.</p><p> </p><p><em><strong>Abstract</strong></em></p><p class="Abstract"><em>A certificate is a form of appreciation that a person receives after completing a certain competency or learning test. Certificates must be created and stored with good methods and security to prevent changes in content or even forgery. Blockchain technology is technology that allows secure storage processes at a low cost. Security is guaranteed because everyone can take part in storing data with a distributed ledger. Based on the results of research and design of the system, it can be concluded that the process of making blockchain technology as a media for issuing certificates and validation can be made using Ethereum's proprietary program Geth and data storage using smart contracts issued on the blockchain network. The results of the reliability testing of the system indicate that the system successfully processed 200 transactions in approximately 8 seconds. For scalability testing, it is estimated that 10 million blocks require a storage capacity of 22.6 GB to become a node or miner on this blockchain network.</em></p><p><em><strong><br /></strong></em></p>