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Cryptocurrency has become a new trend in the world of digital finance, but its adoption is still limited among the public. This study aims to analyze the effect of perceived benefits and trust on cryptocurrency purchase intention among students of Bina Sarana Informatika Margonda University. A quantitative approach was used by distributing questionnaires to student respondents. Data processing uses the SPSS 25 application and data analysis is carried out by testing validity, reliability, classical assumptions, multiple linear regression, hypothesis testing and the coefficient of determination. The results showed that partially perceived benefits had no effect, while trust was proven to have an influence. Simultaneously, perceived benefits and trust affect cryptocurrency purchase intention. The findings imply the importance of increasing understanding of the benefits and building public trust, especially students, in cryptocurrency to encourage the adoption of this technology. This research also highlights the need for further education on the potential and risks of cryptocurrencies, as well as the development of supportive regulations to increase trust and adoption among students and the general public

The implementation of Islamic economics in the modern financial system is an effort to create an economic system that is fair, transparent, and sustainable, based on the principles taught in the Qur'an and Sunnah. The main principles of Islamic economics, such as the prohibition of riba (interest), fairness in transactions, zakat, the prohibition of gharar (uncertainty), and the balance in wealth distribution, provide a strong foundation for the formation of a more inclusive and social economic system. However, its implementation in the era of globalization faces various challenges, such as the lack of uniformity in Islamic legal standards across countries, differences in legal interpretations, and the integration of new technologies like fintech, blockchain, and cryptocurrency, which often conflict with Islamic principles. One solution that can be pursued is the development of Sharia-compliant digital financial products that adhere to the principles of fair and transparent transactions. On the other hand, Islamic financial institutions need to improve operational efficiency and strengthen the Sharia Supervisory Board (SSB) to ensure that financial products are in line with Sharia principles. Education and training in Islamic economics are also key to building a better understanding and accelerating the adoption of Islamic economic principles in the global financial system. Through close collaboration between Islamic financial institutions, regulators, and educational institutions, it is hoped that Islamic economics can provide a more ethical and sustainable alternative in the international market.

This study examines the phenomenon of Central Bank Digital Currency (CBDC) as a technological innovation that changes the landscape of the global monetary system. In the midst of the rapid development of digital technology and cryptocurrencies, central banks in various countries are starting to consider and develop their own digital currencies. This study aims to comprehensively analyze the aspects of CBDC implementation, including its potential benefits, challenges, and impact on financial system stability and monetary policy. Through a descriptive qualitative approach with a literature study method, this study explores various dimensions of CBDC, including technological architecture, implementation models, and its socio-economic implications. The results of the study show that CBDCs have significant potential in improving the efficiency of the payment system, encouraging financial inclusion, and strengthening the transmission of monetary policy. However, its implementation also presents serious challenges related to data privacy, cybersecurity, and the stability of the banking system. This study makes an important contribution to a comprehensive understanding of CBDCs and their implications for the future of the global financial system.

Tangerang City has the highest number of applications in Indonesia, with a total of 222 public service and government management applications supported by an ISO 27001:2013-certified data center. This data center is managed by the ICT Infrastructure and Cryptography Division of the Tangerang City Communication and Informatics Office. However, the process of managing data center assets and infrastructure still relies on OnlyOffice Nextcloud. This approach creates challenges in reading and processing data into meaningful information, data inconsistency, and the inability to track data changes effectively. Moreover, policymakers face difficulties in identifying devices that have reached their end of life (EOL) or are over five years old. This method limits strategic data analysis needed to support decision-making. Therefore, a digital system is required to manage data in a structured and consistent manner, track data changes, and provide relevant information for policymakers. Such a system is expected to enhance operational efficiency and support high-quality digital transformation.

This study explores the re-evaluation and re-shaping of fiqh methodology to ensure Islamic law remains relevant and responsive to contemporary issues. As society evolves, new challenges such as migration, the digital economy, and shifting moral standards present complex legal and ethical dilemmas that traditional fiqh struggles to address. Contextual fiqh, which integrates classical Islamic principles with modern social, economic, and technological developments, offers a dynamic approach to Islamic law that addresses these challenges. The study emphasizes the flexibility of contextual fiqh in offering more adaptable legal solutions, particularly in the realms of migration, digital transactions, and family law. By incorporating modern social dynamics, including technological advancements like cryptocurrencies and virtual marriages, contextual fiqh proposes a legal framework that is both grounded in Islamic principles and relevant to contemporary needs. The research highlights the importance of interdisciplinary engagement between Islamic scholarship and fields such as economics, sociology, and technology, offering a holistic approach to legal decision-making. Through the examination of case studies, such as the application of Islamic legal principles to global migration patterns and digital financial systems, the study demonstrates how contextual fiqh can provide ethical and practical solutions to modern problems. The findings suggest that the adoption of contextual fiqh can lead to more inclusive, just, and responsive legal frameworks, making Islamic law more adaptable and effective in addressing the complexities of the modern world.

Blockchain and cryptocurrencies have changed the way we transact and interact in the digital age. However, the rapid advancement of these technologies has resulted in major environmental impacts. Efficient implementation of blockchain requires the use of large amounts of energy and computing power, with consensus algorithms as the foundation. The purpose of this study is to investigate the environmental implications of blockchain and cryptocurrency implementation, as well as initiatives to mitigate these issues. The type of research is a library study (library research) using a qualitative method, namely by combining, collecting information or previous scientific papers on relevant topics. Along with the growing popularity of cryptocurrencies, the continuous mining process often results in large energy consumption and carbon emissions, sparking concerns about their long-term viability and environmental impact. Based on the results of previous research and research sources, the author found a solution to the problem of high energy consumption from the use of blockchain, namely: Proof of Stake (PoS), Proof of Authority (PoA), Sidechains and Layer-2 Solutions, Hardware Optimization, Implementation of Consensus Algorithms Based on RUST.

Blockchain and cryptocurrencies have changed the way we transact and interact in the digital age. However, the rapid advancement of these technologies has resulted in major environmental impacts. Efficient implementation of blockchain requires the use of large amounts of energy and computing power, with consensus algorithms as the foundation. The purpose of this study is to investigate the environmental implications of blockchain and cryptocurrency implementation, as well as initiatives to mitigate these issues. The type of research is a library study (library research) using a qualitative method, namely by combining, collecting information or previous scientific papers on relevant topics. Along with the growing popularity of cryptocurrencies, the continuous mining process often results in large energy consumption and carbon emissions, sparking concerns about their long-term viability and environmental impact. Based on the results of previous research and research sources, the author found a solution to the problem of high energy consumption from the use of blockchain, namely: Proof of Stake (PoS), Proof of Authority (PoA), Sidechains and Layer-2 Solutions, Hardware Optimization, Implementation of Consensus Algorithms Based on RUST.

This study aims to analyze cryptocurrency investment models in relation to the prevention of money laundering (Anti-Money Laundering/AML) activities. Cryptocurrency, as a growing form of digital investment, has garnered attention from regulators due to its potential money laundering risks. This paper explores preventive strategies that can be implemented within cryptocurrency investment systems, including the use of blockchain technology, KYC (Know Your Customer) procedures, and international regulations such as the Financial Action Task Force (FATF) guidelines. Through a qualitative method based on literature review and policy analysis, the study identifies investment models that can minimize money laundering risks while maintaining profitability for investors. These findings provide insights into the challenges and solutions in developing a safer cryptocurrency investment system that complies with AML regulations.

This qualitative literature review examines the impact of tax policies on cryptocurrency exchange preferences within the context of evolving regulations. With the rapid growth of the cryptocurrency market, understanding the relationship between tax regulations and user behavior has become crucial. This study synthesizes findings from various research articles, highlighting how clear and transparent tax policies can influence user engagement and compliance in cryptocurrency trading. The review reveals that uncertainty regarding tax obligations often leads to user avoidance of cryptocurrency exchanges, while a better understanding of tax responsibilities correlates with more proactive investment management. Furthermore, the analysis indicates that cryptocurrency platforms demonstrating transparency in tax handling are preferred by users. The findings emphasize the necessity for governments to develop supportive tax frameworks and educational initiatives to facilitate healthy growth in the cryptocurrency sector. Overall, the research underscores the importance of regulatory clarity in fostering user trust and participation in cryptocurrency exchanges, ultimately contributing to a more robust and sustainable market.

This study aims to find out what are the forms of modes in the crime of Money Laundering Using Illegal Cryptocurrency Media  as well as Criminal Law policies in an effort to overcome the occurrence of Money Laundering Crimes through  illegal Cryptocurrency  Media. To answer the above problems, this Research Method uses the Normative Law research method which focuses on research on written regulations or legislation or research based on rules or norms that apply in society. The results of the discussion in this study show that, (1)  The mode of operation used by the perpetrators in the crime of money laundering through Cryptocurrency media  is by trading and investment methods along with several other methods. The perpetrators take advantage of the transaction system on cryptocurrencies that are closed or anonymous so that the perpetrators get an opening to launch criminal acts. 2) Even with existing legal regulations, there are still criminal acts, especially TPPU which are carried out through  illegal cryptocurrencies, so it is better for the government to make rules or make legal updates on how to process related to Money Laundering Crimes using cryptocurrencies which include crypto platforms, both legal and illegal.

Cryptocurrency users, including those utilizing Bitcoin, Litecoin, Dogecoin, and others, are increasingly prevalent in Indonesia. Since the Rupiah is the only legal currency in Indonesia, cryptocurrencies cannot be used as a means of payment or exchange in financial transactions within the country. However, cryptocurrencies are considered investments when incorporated into commodities, becoming crypto assets that can be used as digital investment assets. This research employs normative legal research to explore legal principles and norms to address legal questions. If someone exchanges assets obtained from criminal activities for crypto assets, thinking they are legitimate, and if the money in these crypto assets is derived from criminal proceeds, such actions constitute money laundering (ML). This process involves purchasing crypto assets with illicit gains, exchanging Rupiah for cryptocurrency, or converting Rupiah into cryptocurrency. While cryptocurrency is recognized as a legal digital commodity for investment purposes in Indonesia, it becomes illegal when misused by individuals seeking to legitimize wealth obtained illegally. Converting illegally acquired wealth into cryptocurrency to deceive the government and make the transaction appear lawful may result in legal consequences

The integration of blockchain technology and cryptocurrency within the framework of Islamic finance has raised significant ethical, legal, and regulatory concerns. Blockchain technology, known for its transparency, decentralization, and immutability, offers a promising solution for enhancing financial inclusion, transparency, and security in financial transactions. However, the use of cryptocurrencies, such as Bitcoin and Ethereum, introduces complexities due to their speculative nature, which may violate Sharia principles like gharar (excessive uncertainty) and riba (usury). This study explores the compatibility of blockchain and cryptocurrency with Sharia law, focusing on the challenges and opportunities that arise in the context of Islamic finance. The study analyzes existing fatwas (Islamic legal opinions), regulatory frameworks, and the application of Sharia principles to emerging financial technologies. It discusses the ethical dimensions of blockchain and cryptocurrency, such as their potential to promote fairness and transparency, while addressing concerns about privacy violations and the risks associated with unregulated trading. Furthermore, the research highlights the lack of standardized global regulations for cryptocurrency and blockchain, which complicates their adoption in Muslim-majority countries. The study also emphasizes the importance of establishing Sharia-compliant governance frameworks and regulatory standards to ensure the ethical use of these technologies. Finally, the study provides recommendations for further research in the intersection of Islamic law, digital finance, and global governance frameworks, focusing on the development of policies that ensure Sharia-compliant digital assets and technologies.

Cryptocurrency is a blockchain-based technology that is used for all activities so that it has the potential to increase state revenue, especially in terms of taxation. This study aims to determine the implementation of tax policies on Cryptocurrency transactions in Indonesia. This research uses descriptive qualitative methods using secondary and primary data. Secondary data is obtained through journals, books, and tax laws. Based on this research Cryptocurrency can be subject to income tax and value added tax. The results of this study indicate that the implementation of tax policies on crypto asset transactions in Indonesia has referred to the provisions as stated in PMK Number 68 / PMK.03 / 2022. However, there are still some weaknesses in the implementation of this tax policy on crypto asset transactions. In addition, in terms of supervision, it still only adheres to supervision of formal tax obligations. Therefore, supervision of the implementation of tax policies on crypto asset transactions still needs to be improved.    

The development of quantum computing presents new challenges to the security of data stored and processed by today's computer systems. Quantum computers have the ability to perform calculations at very high speeds, which could threaten the security of currently used encryption algorithms. Therefore, steps are needed to design and implement an operating system that is able to protect data from quantum computing threats. Ubuntu Linux version 22.04, as one of the leading open source Linux distributions, offers high-level security features. To face the era of quantum computing, it is necessary to carry out special development and implementation of this operating system. This research aims to improve the security of the Ubuntu Linux operating system version 22.04 so that it can withstand quantum computing attacks by designing and implementing a quantum-resistant cryptography protocol and testing the security and performance of the resulting system. This research method uses a qualitative approach and research and development (R&D) with literature studies. The research results show that the integration between Liboqs and OpenSSL on Linux Ubuntu 22.04 successfully implements a cryptographic algorithm that is resistant to quantum computing. Although there is a slight performance increase due to the additional overhead of the quantum algorithm, the security of the system in protecting data from quantum computing attacks is proven to be well maintained.    

In the current digital era, data security is a top priority for individuals, organizations, and businesses. Data is considered a valuable asset that needs to be protected from various security threats, especially in operating systems where data is stored (data at rest) and transmitted (data in motion) through networks. This research aims to enhance data security by implementing modern cryptographic methods. The cryptographic methods used include RC4, AES, and WPA3. Penetration testing is conducted to evaluate the effectiveness and efficiency of each cryptographic method. The research results show that the implementation of modern cryptography provides an additional layer of security against security threats to data in motion and data at rest within the operating system.

This paper explores the Time-Based One-Time Password (TOTP) authentication mechanism enhanced with lightweight cryptographic algorithms, presenting it as an advanced solution to the limitations of traditional OTP systems. There are a lot of applications and systems where this mechanism is applied. For example, bank applications, e-commerce websites, access control system, healthcare system, etc. TOTP generates dynamic, time-sensitive passwords using the current time and a secret key processed through a cryptographic hash function, significantly improving security by reducing vulnerabilities to code reused and interception. The adoption of lightweight algorithms ensures that TOTP can be efficiently implemented on resource-constrained devices, such as those on the Internet of Things (IoT) ecosystem. Despite its benefits, TOTP faces challenges including synchronization issues between client devices and servers, and a trade-off between computational efficiency and security strength. This paper discusses the implications of these challenges and evaluates how TOTP, with appropriate design considerations, can provide a robust, secure, and efficient authentication method suitable for various applications, from digital banking to IoT environments.

The Internet of Things (IoT) phenomenon is centered around linking various devices and objects to the Internet, enabling them to communicate, collect, and exchange data [1]. The IoT needs strong, lightweight, and secure authorization schemes to regulate many devices with varying levels of ability. Quantum-resilient federated Multi-Factor Authentication (QRF-MFA) is a solution presented in this paper to address the above-discussed issues. Featuring quantum-resistant cryptographic protocols, high-speed and low-energy Physically Unclonable Functions (PUFs), decentralized identity management, and optimized communication protocols, QRF-MFA provides a complete solution for secure cross-domain device identification and authentication. This is done by leveraging blockchain technology for immutable and transparent management of identities yet limiting on-chain storage overhead. It also provides secure, lightweight communication well-suited for resource constrained IIoT devices, and it is designed for fog and edge computing environments as well. QRF-MFA eliminates the challenges of current methods by combining security, efficiency, and scalability and delivering a resilient and future-ready solution to secure IIoT authentication.  

The Industrial Internet of Things (IIoT) enhances the connectivity and efficiency of living lifestyles. However, it also comes with significant security vulnerabilities. Traditional authentication methods are often inadequate, leading to IIoT devices opened to security threats. This paper proposes a comprehensive security framework integrating blockchain, cryptographic techniques, smart contracts, and deep learning-based Intrusion Detection Systems (IDS) to tackle the mentioned issue. Blockchain ensures data integrity and prevents tampering through a decentralized ledger. A decentralized device identity management system enhances user verification, while secure communication protocols using Hash-based Message Authentication Codes (HMAC) safeguard data integrity. Smart contracts automate transactions, providing transparent, secure record-keeping without a central authority. The deep learning-based IDS, utilizing Contractive Sparse Autoencoder (CSAE) and Attention-Based Bidirectional Long Short-Term Memory (ABiLSTM) networks, effectively detects cyber threats. Evaluation metrics, including precision, recall, F1-score, and False Acceptance Rate (FAR), demonstrate high accuracy and low false alarm rates across datasets. This framework addresses the need for secure, efficient, and scalable authentication in IIoT, combining blockchain's security features with advanced cryptographic and anomaly detection techniques, offering robust defence against cyber threats.

The Industrial Internet of Things (IIoT) has revolutionized industrial processes, offering automation and data-driven decision-making. However, this interconnectedness brings new security challenges, especially in crucial infrastructure sectors. Traditional security measures are inadequate, leading to the exploration of innovative solutions. Blockchain technology has emerged as a promising solution due to its decentralized and immutable nature. This paper proposes a Hybrid Blockchain-Based Authentication Mechanism for IIoT, combining Delegated Proof of Stake (DPoS) and Elliptic Curve Cryptography (ECC). The hybrid architecture utilizes public and private blockchains to ensure scalability, efficiency, and security. Lightweight consensus algorithms, DPoS, are incorporated to optimize performance, while ECC provides efficient cryptographic techniques suitable for IIoT environments. An interoperable framework facilitates seamless integration with existing infrastructure, ensuring regulatory compliance and compatibility. Decentralized identity management further enhances security and privacy. Results and analysis demonstrate the effectiveness of the proposed solution, positioning hybrid blockchain architecture as the most suitable approach for enhancing security in IIoT environments.

This research is normative legal research that uses a normative judicial approach. The research results show that: (1) There are differences of opinion between judges, e-commers and notaries. regarding the strength of proof of a signature on an electronic document in proving civil procedural law in Indonesia. Judges and e-commers are of the opinion that electronic documents that have been signed with an electronic signature have the same evidentiary power as authentic deeds made by authorized officials, after the issuance of Law Number 11 of 2008 concerning Electronic Information and Transactions. Meanwhile, the notary is of the opinion that an electronic document signed with an electronic signature only has the power of proof under the hand, because it does not meet the requirements as an authentic deed, that is, it does not appear before an authorized official; and (2) Settlement of disputes resulting from non-fulfillment of the agreement can be resolved using a court or an institution outside the court, but e-comers generally use institutions outside the court because it is considered easier and faster to resolve and the costs are cheaper.The use of an electronic signature on an electronic document can guarantee the security of an electronic information message, which uses a public network, because electronic signatures are created based on asymmetric cryptography technology. From this research, there are differences of opinion regarding the evidentiary power of electronic documents signed with electronic signatures that are used as evidence in trials. The use of an electronic signature on an electronic document can guarantee the security of an electronic information message, which uses a public network, because electronic signatures are created based on asymmetric cryptography technology. From this research, there are differences of opinion regarding the evidentiary power of electronic documents signed with electronic signatures that are used as evidence in trials. Furthermore, electronic signatures need to be certified so that they have evidentiary power such as authentic deeds and there is no need to carry out digital forensic tests in the evidentiary process at trial.