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The rise of financial technology (fintech) has significantly reshaped global investment over the last decade. Fintech innovations are increasingly applied in areas such as digital investment platforms, robo-advisors, blockchain-based assets, and cryptocurrency trading. The adoption of fintech in investment continues to grow due to the rising demand for accessibility, transparency, and efficiency in financial markets. Fintech has the potential to democratize investment by lowering entry barriers, expanding financial inclusion, and offering diverse investment instruments for retail investors. Therefore, research on fintech and investment has become an essential topic in recent years. This study uses a qualitative approach with data obtained from the Scopus database, which includes a total of 4,794 articles on fintech and investment published in the last decade (2020–2025). In addition, several software tools such as R Studio, VOSViewer, and Publish or Perish were used for data processing and bibliometric visualization. This study aims to analyze the development of research trends in fintech-driven investment, explore how technology is changing investor behavior, and provide insights for policymakers and practitioners in strengthening a sustainable and inclusive investment ecosystem.

MP3 audio files are often used in a variety of fields, but they are prone to security risks such as eavesdropping and illegal access. This study proposes a super encryption method by combining the algorithms of Rivest Shamir Adleman (RSA) and ElGamal to improve the protection of audio data. RSA was chosen for its efficiency and ease of implementation, while ElGamal offers a high level of security through discrete logarithmic complexity. The combination of the two is expected to address the weaknesses of each algorithm and strengthen file security. The system is developed using the Python programming language with the Visual Studio Code environment. The encryption process is done in layers: MP3 files are first encrypted with RSA, and then the results are encrypted again with ElGamal. The decryption is done in reverse order. Tests are conducted with various MP3 file sizes to measure the effectiveness and performance of the system. The results show that this method is able to secure audio files so that they cannot be accessed without the private keys of both algorithms. Although processing times are increased compared to single encryption, the level of security obtained is much higher. This approach can be an effective solution for protecting digital audio data, particularly MP3 format, and could potentially be applied to a wide range of other data types that require a high level of security.

Currently, stock processing and transactions at Aldi grocery stores are still done manually, making it inefficient. This situation sometimes causes Aldi stores to experience differences in data between the income and expenditure of goods. By creating this application, user errors in recording goods expenditure are minimized. This application has been successfully built using PHP, MySQL, Laravel, Visual Studio and XAMPP. This application aims to make it easier for users to record incoming and outgoing goods and ongoing transactions so that recording is made computerized, and based on the results of black box testing, this application works with the desired output. This website can be accessed via the link http://aplikasikasirtokoaldi.my.id.

The usage of manual keys in door security has become obsolete due to the increasing risk of theft and loss of valuable items. Observations at the Dean’s Office of the Faculty of Engineering at Universitas Negeri Padang reveal the shortcomings of manual key systems, including the possibility of getting stuck, lost keys, and the inability to record access. TCAD (Tap Card Access Door) offers a solution by utilizing NFC and cameras to directly monitor door access. This research aims to develop TCAD that can real-time monitor door access and store usage data. The development method for TCAD follows the waterfall model, and the system is designed using PHP with the Laravel framework, JavaScript, MySQL as the DBMS, and Visual Studio Code as the editor. Test results demonstrate that TCAD with NFC and web-based monitoring simplifies access entry recording, facilitates data collection during user room access, and improves data search efficiency. With TCAD, it is expected that door security and access monitoring can be better controlled and more efficient in line with current technological advancements.

This design aims to determine the cash receipts system for new student registration in order to support the effectiveness of cash receipts for new student registration at SMP KARTIKA XI Bandung. This study uses a qualitative method with a descriptive approach while the software development method uses the water fall method. Data collection techniques using observation, interviews and library studies. Design information system using visual studio and ms.access. Based on the observations made, it turns out that the accounting information system for cash receipts for new student registration is still not perfect. The problems that occur are that the system used is still manual, the reports produced have not been presented quickly and accurately, the files presented are still in the form of hard files. The suggestions that the author gives, it is hoped that the school can manage finances using a good internet network and server. Thus, prospective students can access the software and servers more optimally.