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The dissemination of personal data through digital media has increased significantly alongside the growing use of Quick Response (QR) Codes for various purposes, such as electronic tickets, certificates, and digital identities. Conventional QR Codes are open and can be easily scanned, copied, or manipulated by unauthorized parties. The personal data referred to in this study includes sensitive information such as full name, identity number (NIK/National ID), date of birth, address, phone number, and email address. This research proposes a layered security system that combines the Advanced Encryption Standard (AES) cryptographic algorithm with steganography using the Discrete Cosine Transform (DCT) method. The process begins with encrypting personal data using AES, converting the encrypted result into a QR Code, and embedding the QR Code into a digital image using DCT, hiding it in the image’s frequency domain. The digital images used are of fixed size and formats that preserve visual quality. System evaluation is carried out by testing the visual quality of the stego image, the success rate of QR Code extraction, and the integrity of the encrypted data. The results are expected to conceal sensitive information visually while maintaining its confidentiality, with potential applications in electronic ID cards, digital certificates, e-tickets, and other confidential documents.

This study aims to design and develop an Augmented Reality (AR)-based application for real-time data monitoring of an automatic weather station at PT. XYZ. The system was developed using a prototyping method, involving five key stages: sensor data acquisition via CBOX devices and the Modbus RTU protocol, data transmission through a Flask-based Web API, storage in a MySQL database, QR code-based target image creation using the Vuforia Engine, and a 3D visualization interface developed with Unity integrated with the Vuforia SDK on Android devices. The system successfully received and stored weather data—such as temperature, humidity, and wind speed—into the MySQL database. The AR application also displayed a stable 3D interface panel over QR code markers, providing real-time data updates through an HTTP-based mechanism. This research demonstrates the successful integration of SCADA, Flask, MySQL, and Unity, enhancing both the functionality and commercial appeal of PT. XYZ’s weather station products. Future research should focus on field testing, cloud network integration, and device compatibility.

This study is motivated by the importance of information literacy among students in using the Shopee e-commerce platform. The purpose of this study is to determine the level of information literacy of 2022 cohort students at the Faculty of Languages and Arts, Padang State University, in using the platform e-commerce Shopee. This research employs a quantitative approach with a descriptive method. The population in this study consists of all 2022 cohort students of the Faculty of Languages and Arts, Padang State University, totaling 1,208 students, with a sample of 92 respondents selected using a simple random sampling technique based on the Slovin formula. Data collection in this study was conducted using a questionnaire developed based on the The Seven Faces of Information Literacy model, which was distributed online via WhatsApp in the form of Google Forms and directly through QR codes.Based on the confidence interval calculation, the average level of students’ information literacy falls within the range of 3.05 < μ < 3.27, indicating that the information literacy level of 2022 cohort students in using the platform e-commerce Shopee at the Faculty of Languages and Arts, Padang State University, is categorized as high. In general, it can be concluded that students have a good level of information literacy, particularly in aspects of information technology use, utilization of information sources, information searching processes, information control, knowledge construction, knowledge development, and wisdom in using information on the Shopee e-commerce platform.

Correspondence administration is vital for supporting operational efficiency in schools. However, manual management often leads to issues such as data retrieval delays, recording errors, and the risk of lost archives. This research aims to design and develop a Web-Based Administration Data Monitoring Information System using QR Codes at UPTD SMAN 3 Majene. The study employs the Research and Development (R&D) method with the Waterfall model, encompassing requirements analysis, system design, implementation, testing, and maintenance.The system involves three primary users: Admin/Administrative Staff, Teachers, and the Principal. QR Codes are implemented as digital identities to facilitate easier archive tracking and retrieval. Results indicate that the system enhances effectiveness and efficiency in correspondence management, accelerates letter request services, and simplifies data monitoring for school management. This system is expected to provide a solution for achieving orderly administration at UPTD SMAN 3 Majene. Furthermore, QR Code integration ensures document validity and digital archive security, supporting a more modern, transparent, and sustainable school governance transformation.

This study examines the transportation management flow at PT Xpresindo Logistik Utama Medan Warehouse and its impact on delivery accuracy. The research method used a qualitative approach through direct observation and interviews with warehouse managers and operational staff. The results showed that the distribution flow from receiving goods from Jakarta to shipping to customers in Medan was quite effective, although it was still dominated by manual systems such as the use of Delivery Notes and Excel records. The use of the Monstra tracking application was not evenly distributed, so fleet movement information was not always updated in real time, especially when demand volume increased at the end of the month. To improve efficiency, the study recommended the implementation of a Transportation Management System (TMS), digitalization of barcode/QR code-based inventory processes, and a Key Performance Indicator (KPI) dashboard to monitor delivery timeliness and fleet utilization periodically.

Administrative letter services at the village (nagari) level are still largely conducted using conventional methods, resulting in various issues such as limited service hours, slow processing times, and risks of document loss. This study aims to develop a web-based letter service system with the implementation of digital signatures in Nagari Bukit Bais to improve efficiency, security, and transparency of public services. The research adopts the Agile Development method with an iterative approach, including requirement analysis, system design, implementation, and testing. The developed system enables citizens to submit requests online and is equipped with features such as officer verification, digital signing by the village head, automatic notifications, digital archiving, and document verification using QR Codes. Security mechanisms are implemented using SHA-256 cryptographic hashing and RSA-2048 digital signature algorithms, supported by X.509 digital certificates. Functional testing using end-to-end methods shows that all system features operate successfully without failures, while non-functional testing confirms the reliability of document security and integrity. The resulting system is able to automate the entire service process, reduce processing time, and ensure document authenticity and security. Therefore, this system can serve as a solution to support the digital transformation of public services at the village level.

Fixed asset management is a crucial component in supporting the performance of local governments. However, the Polewali Mandar Regency Government still faces obstacles in managing assets conventionally, such as the risk of recording errors, duplicate data, and difficulties in field data verification which is time-consuming. This study aims to design and build a Web-Based Fixed Asset Management Information System integrated with Quick Response Code (QR Code) technology as a digital solution for real-time asset data collection, tracking, and monitoring. The approach taken for system development is known as the Waterfall approach, encompassing the phases of analyzing requirements, system design, execution, evaluation, and ongoing support. The creation of the system was carried out utilizing the PHP coding language, the MySQL database system, and Tailwind CSS to achieve a mobile-friendly interface. Data collection techniques were conducted through observation, interviews, and literature studies at the General Affairs Division of the Regional Secretariat of Polewali Mandar Regency. The result of this research is a fixed asset management information system featuring the generation of unique QR Code labels for each asset, category and location management, and reporting features divided into three access levels: Admin, Operator, and Verificator. Based on the system testing results, an average score of above 4.00 was obtained for indicators of ease of use (user-friendly), access speed, and information accuracy. In conclusion, the implementation of this QR Code-based system is proven to increase the efficiency of the asset identification process in the field, minimize manual input errors, and improve accountability in regional asset management in Polewali Mandar Regency.

The digitalization of payment systems constitutes an integral part of economic digital transformation, driving a shift in transactions from cash-based to technology-based cashless payments. In Indonesia, this digitalization is manifested through the development of the Quick Response Code Indonesian Standard (QRIS) by Bank Indonesia as a national standard for QR code–based payments. Along with its development, QRIS has not only been used in domestic transactions but has also been implemented in cross-border transactions through intercountry payment system cooperation, particularly within the ASEAN region. However, the rapid expansion of QRIS has not been accompanied by comprehensive and structured legal regulation. This study aims to analyze the structure and hierarchy of QRIS regulation within Indonesia’s payment system as well as the forms of legal protection for consumers in cross-border QRIS transactions. The research employs a normative juridical method using statutory, historical, and conceptual approaches. The findings indicate that QRIS does not yet have a Bank Indonesia Regulation as a primary regulatory framework and is regulated solely through a Regulation of Members of the Board of Governors, which hierarchically functions as an implementing regulation. Consequently, QRIS regulation refers to several different Bank Indonesia Regulations, resulting in regulatory fragmentation. This condition has implications for legal uncertainty and the suboptimal legal protection of consumers in cross-border QRIS transactions.

The SMK N 3 Kendal Library is a vital resource supporting teaching and learning activities at the school. However, the manual process of registering and identifying library members often presents various challenges, such as data entry errors, service delays, and difficulties in membership verification. Based on these challenges, a QR Code-based member and library book registration system was designed and developed to improve the efficiency and accuracy of membership data management. This system was built using the Waterfall system development method, with stages including needs analysis, system design, implementation, testing, and maintenance. QR Code technology serves as a unique identifier for each member, stored in the database and can be scanned using a digital device to expedite the identification process. System testing results indicate that implementing QR Codes in the member registration system can accelerate the library's book borrowing process at the school, including registration, data retrieval, and member verification, by up to 80% compared to manual methods. Therefore, this system can help the library improve service effectiveness, minimize data input errors, and support more modern and integrated library administration.

The E-Kinerja Program is a policy innovation developed by the Madiun City Government to support the digitalization of civil servant performance management as part of bureaucratic reform and the implementation of the Electronic-Based Government System (SPBE). This study aims to evaluate the implementation of the E-Kinerja Program in Madiun City using six policy evaluation criteria proposed by William N. Dunn, namely effectiveness, efficiency, adequacy, equity, responsiveness, and appropriateness. This research employs a qualitative descriptive approach, with data collected through interviews, direct observation of the E-Kinerja application usage, and documentation review of related policies. The findings indicate that the E-Kinerja Program is relatively effective and efficient in supporting the monitoring of civil servant attendance and daily activities through features such as QR Code-based attendance, photo documentation, and daily activity reporting. However, several challenges remain, including unstable GPS accuracy, limited internet connectivity, and the practice of non real time input of daily activities. In addition, differences in digital literacy levels and device compatibility among civil servants affect the equitable utilization of the application. Overall, the implementation of the E-Kinerja Program is considered appropriate as part of bureaucratic digital transformation in Madiun City, although further improvements in technical aspects and human resource capacity are required to optimize its implementation.

: The empowerment of micro, small, and medium enterprises (MSMEs) plays a crucial role in strengthening local economic resilience, increasing community welfare, and enhancing competitiveness in the digital era. This international community service program focuses on developing the Kedung Aren Banana Chips MSME through the implementation of product-based QR Codes as a digital marketing tool. The program aims to improve digital literacy, strengthen branding, and expand market reach, particularly toward potential international consumers. The activities conducted include training on QR Code creation, guidance on integrating digital information into product packaging, monitoring marketing practices, and evaluating the program’s effectiveness. Feedback from Malaysian partners and participants indicates that optimizing QR Codes with dynamic and informative digital content significantly enhances market accessibility, consumer trust, and promotional effectiveness. The program generates positive economic impacts through increased sales potential, social benefits through improved human resource capabilities, and environmental benefits by reducing the use of printed promotional materials. Overall, the program provides a sustainable foundation for MSME modernization and positions Kedung Aren banana chip products to compete more effectively in both domestic and global markets.

In the 21st century learning era that demands the integration of 4C skills and digital literacy, the textbook Akidah Akhlak Class IV MI based on the 2019 KMA 183 Curriculum needs to be evaluated for its suitability to be relevant in shaping students' Islamic character. This study aims to analyze the suitability of the book's content, presentation, language, and graphics according to BSNP standards, with a focus on the strengths of active learning and the weaknesses of technology integration such as QR codes and science-technology interconnections. The descriptive qualitative method through library research uses the 2020 Kemenag textbook by Subkhiaton Noor as primary data, supported by BSNP instruments and comparisons with other books. The results show that the book is very suitable overall: very good content suitability (accurate material, relevant KI-KD, supports 4C through discussion and reflection), good presentation (systematic structure, HOTS-LOTS, glossary), good language (communicative, appropriate to students' cognition), graphics pass with minor improvements in visual consistency, so it is effective for contextual learning even though it needs additional digital features.

This study analyzes the effectiveness of using BNI Bank’s QRIS in improving transaction convenience and efficiency at the canteen of Universitas 17 Agustus 1945 (UNTAG) Surabaya. The research was conducted by a team led by Ida Ayu Nuh Kartini, S.E., M.M., together with students of the Management Study Program, during November–December 2025. The rapid development of digital banking has encouraged the adoption of QRIS as a standardized non-cash payment system regulated by Bank Indonesia. This study aims to examine the level of QRIS BNI utilization, assess ease of use (application access and QR code scanning), and evaluate transaction efficiency, including time savings, queue reduction, and error minimization. A descriptive quantitative approach was employed using a survey method with a five-point Likert scale questionnaire distributed to 36 respondents consisting of students, lecturers, and administrative staff who had used QRIS at the canteen. Primary data were analyzed descriptively using averages and percentages, supported by relevant literature. The results show that QRIS is perceived as highly effective, with scores above 90% for ease of use (95%), transaction speed (92.78%), reduction of change-related issues (97.78%), support for digitalization (97.22%), and security (91.11%). The main limitation identified is dependence on internet connectivity (85%). Overall, respondents strongly support the full implementation of non-cash payment systems at the campus canteen.

The Marketing Mix strategy is a combination of various marketing elements that include product, price, distribution place, and promotion. The Marketing Mix strategy, also known as the marketing mix is a concept in marketing that explains four main elements that must be managed in an integrated manner to achieve marketing objectives. In general practice, the using of QRIS is a payment standard using a QR code developed by Bank Indonesia and the Indonesian Payment System Association to simplify and accelerate digital transactions. Through VOSviewer analysis, the implementation of QRIS can have a positive impact on the operations and business performance of MSMEs, and the marketing mix strategy in the context of business digitalization becomes an important approach to maintaining MSME competitiveness. The results of the VOSviewer visual map analysis and the review of previous State of the Art research indicate that most existing studies still focus on aspects of QRIS adoption and transaction efficiency alone. These studies generally highlight how digital payment system is able to  improve the speed, security, and convenience of transactions but have not yet widely linked them directly to marketing mix strategies and consumer purchasing decisions. This indicates a research gap in understanding the role of QRIS is not only as a transaction tool but also as part of the marketing strategy that influences consumer behaviour.

The design of the 3:30 Kopi website poster was carried out as an effort to present an effective and modern promotional medium to support information needs and introduce the café’s digital platform to the wider community. In line with the development of the digital era, local SMEs such as 3:30 Kopi are required to remain competitive by utilizing visual media that is both communicative and appealing. This poster functions not only as an information tool but also as a branding strategy to strengthen the café’s identity in the eyes of consumers, particularly in the Ciledug area and its surroundings. The visual concept of the poster was designed with careful consideration of both aesthetics and function. The use of brown and cream tones symbolizes the warm and natural character of coffee, while also creating a friendly and elegant impression. Typography was chosen with a simple yet bold style to ensure information is easy to understand. The main elements, featuring a mockup of the website displayed on both laptop and mobile devices, emphasize the flexibility and responsiveness of the platform, which can be accessed anytime and anywhere. In addition, the inclusion of a QR code provides a modern solution that facilitates quick and practical interaction between the audience and the website. Cultural-inspired ornaments derived from 3:30 Kopi’s signature menu further reinforce its visual identity while adding aesthetic value. Through this poster design, 3:30 Kopi is expected to increase brand awareness, attract new visitors, and strengthen its image as a café that not only offers coffee but also provides a productive social space suited to the needs of modern society.

This community service activity aims to improve the literacy of residents in Penambangan Village through the implementation of a QR Code-based digital library at the Educational Center. The background of this program lies in the low level of literacy in rural areas, which is strongly influenced by the limited access to reading materials and the absence of library facilities. In the current digital era, the need for fast, easy, and affordable access to information has become increasingly important. Therefore, the application of simple technology such as QR Codes is considered an innovative solution to bridge the literacy gap between rural and urban communities. The method used in this activity was Participatory Action Research (PAR), which emphasizes active involvement of the community. The stages of the program consisted of initial observation to identify literacy needs, collaborative planning with local residents, implementation of the QR Code-based digital library, and reflection to evaluate achievements and challenges. This method ensured that the community was not only an object but also an active subject in the process of improving literacy. The results show an increase in reading interest and access to digital literacy, especially among young people. QR Codes installed at several strategic points enabled residents to access various digital reading resources using smartphones. Nevertheless, some obstacles were identified, including limited internet infrastructure and low digital literacy among the older population. Despite these challenges, the program successfully demonstrated that simple, technology-based approaches can significantly enhance literacy in rural areas. In conclusion, the implementation of a QR Code-based digital library supported by a PAR approach can serve as an effective alternative to increase literacy in rural communities. The success of the program strongly depends on collaboration among local residents, academics, and stakeholders to ensure its sustainability in the long term.

Attendance is an essential activity in both educational institutions and companies, serving as an indicator of discipline, presence, and individual responsibility. Conventional attendance systems that still rely on manual journals often face several problems, such as vulnerability to manipulation, data loss, and physical damage. Meanwhile, modern methods such as fingerprint, QR code, RFID, and GPS are not entirely ideal since each has its own limitations in terms of cost, accuracy, user convenience, and potential misuse. For instance, fingerprint systems raise hygiene concerns due to shared use, while QR code and GPS methods are prone to fraud and location spoofing. To address these challenges, this study proposes a face-based attendance simulation system by integrating the YOLOv8 algorithm for face detection and Local Binary Pattern Histogram (LBPH) for face recognition. YOLOv8 was chosen for its ability to detect faces in real time with high speed and accuracy, while LBPH is employed for face recognition due to its robustness in handling variations in facial features and its relatively low computational requirements. This makes the system efficient even when implemented on medium-specification devices. The system was tested on 25 participants with a total of 250 attendance attempts. Based on the confusion matrix analysis, the system achieved outstanding performance with 98.4% accuracy, 98.4% precision, 100% recall, and a 99.2% F1-score. Furthermore, the system automatically recorded attendance dates and times with an average latency of 69.185 ms, proving its capability to operate quickly and reliably in real-world scenarios. Nevertheless, several limitations were observed, such as decreased accuracy when the face moved too quickly during image capture, as well as potential performance degradation under extreme lighting conditions. Despite these challenges, the proposed system demonstrates excellent performance and offers a promising solution for efficient, hygienic, and fraud-resistant attendance management applicable to both educational and professional environments.

Mail management in higher education institutions, particularly at the Nurul Fikri Integrated Technology College (STT), is still carried out manually or conventionally. This process involves physically recording and distributing letters, which in practice often creates various obstacles. Some common obstacles include the long time required to manage letters, the risk of document loss or damage, and the high possibility of errors in letter numbering. Furthermore, the document validation process is also less effective due to the lack of a system that supports electronic signatures or digital verification of document authenticity. Based on these conditions, this study aims to design and develop a digital system that can help manage letters more efficiently and securely. This system is designed not only to speed up the administrative flow of correspondence but also to simplify the document validation process through the application of digital technology. Thus, this system is expected to reduce administrative errors, increase work efficiency, and ensure the security and validity of official documents. The method used in this study is Design Thinking, which consists of five main stages: empathize, define, ideate, prototype, and test. This approach enabled researchers to deeply understand user needs, explore various alternative solutions, and create an intuitive and user-friendly interface design for all parties involved in the administrative process. The research results showed that the designed system can accelerate the administration process for official letters and documents. The embedded superior features include digital validation and electronic signatures integrated with QR Code technology, thus providing a higher level of transparency and security in document management within the university environment.

The Printed Circuit Board (PCB) industry increasingly relies on automation and digitalization to improve efficiency and accuracy in production and distribution processes. One common practice is the use of labels containing product information in the form of barcodes or QR codes, which allow automatic data input and reduce the risk of human error compared to manual writing. However, in current practices, these labels are only attached to PCBs after they have been placed inside casings. This creates a significant limitation, as access to the label information requires disassembling the casing whenever product verification, tracking, or troubleshooting is needed. Such a process not only consumes additional time and resources but also increases the risk of damaging the product. To overcome this challenge, this study proposes the development of a traceability system designed to accurately monitor the location, identity, and status of PCBs throughout the distribution process. The system was implemented as a web-based application capable of generating and printing product information labels in the form of barcodes and QR codes. Each label functions as a unique identifier, ensuring that every PCB can be distinctly tracked from production to final product assembly. All data associated with the labels is automatically stored in a centralized database, providing real-time accessibility, simplifying information management, and enabling faster decision-making in the event of quality control issues. System evaluation was carried out through rigorous testing, which showed a 100% success rate in generating, storing, and retrieving product information without errors. The findings indicate that the proposed traceability system is both effective and efficient, and it offers a practical solution for industries seeking to enhance supply chain visibility, improve product accountability, and reduce operational inefficiencies in PCB distribution and lifecycle management.

PT Udara jadi Bersih Bekasi is a company engaged in testing Heating, Ventilation, and Air Conditioning (HVAC) systems. So far, the process of recording test results is still carried out manually using paper media. This process poses a number of obstacles, such as delays in recording, potential input errors, and limitations in accuracy and data storage. This condition also has an impact on delays in the submission of test results information to supervisors, who should need fast and accurate data for decision-making. To answer this problem, a web-based application is needed to design a web-based application that is able to digitize the entire workflow of recording and reporting HVAC test results. With a web-based system, data can be managed centrally, more structured, and easily accessible at any time. This application is also equipped with QR Code technology to speed up access to test results. Supervisors and technicians only need to scan the code for complete information, so they no longer rely on manual searches that are time-consuming and prone to serious errors in technical documentation. The design of this application uses the Waterfall method which consists of the stages of needs analysis, system design, implementation, testing, and maintenance. UML is used as a tool to describe business processes and system activity flows in detail, so that development can be carried out more systematically, efficiently, and in a targeted manner according to applicable software engineering standards. With the implementation of this application, PT Udara jadi Bersih Bekasi is expected to be able to improve operational efficiency, reduce recording errors, and speed up the information distribution process. In the end, this digitalization will support companies in providing services that are more professional, accurate, innovative, reliable, and according to the needs of the modern HVAC industry in the era of global digitalization.