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Implementing REST in modern applications, security will be a key foundation for its development because the REST architecture requires communication between servers. In this study, we will enhance REST request security by using SHA-1 tokens and the Keccak algorithm. Tokens are the access keys for making requests. The token generation process is carried out on the server; the client will generate a token, and the server will return a valid token. This valid token can be used to request data from the server. Adding a token will impact the security and speed of REST. The token will be verified by the server and declared valid. If valid, the server will return the data; otherwise, the server will send an error message. Compared to using a token, data security is more assured. Furthermore, adding a token parameter will increase the token verification process, thus increasing the number of processes, which will impact speed. The results of this test show that server data security is better maintained and more secure compared to using a token, because anonymous users cannot access the data. The API access speed without a token is 48.8 milliseconds, while using a SHA-1 token is 62.3 milliseconds, and the Keccak algorithm is 58.9 milliseconds. The time efficiency reduction for implementing the SHA-1 token algorithm is 27.67% or 13.5 milliseconds, and the Keccak algorithm is 26.6% or 10 milliseconds.

The increasing demand for interactive web applications has encouraged the adoption of server-driven approaches such as Livewire as an alternative to building Single Page Applications (SPAs) without complex client-side JavaScript. However, the performance implications of this approach compared to conventional methods remain insufficiently explored. This study presents an empirical comparison between Laravel Blade with AJAX and Livewire in an academic attendance system scenario. Performance evaluation was conducted using k6 on the same web server, complemented by manual browser-based testing to observe actual communication patterns. The results indicate that Livewire exhibits approximately 2.7× higher average response time and up to 6× greater bandwidth consumption than Laravel Blade, primarily due to its snapshot mechanism and state synchronization process. Conversely, Livewire demonstrates better stability, reflected by lower maximum response times and a 0% error rate. These findings highlight a clear trade-off between resource efficiency and development convenience, where Livewire favors stability and developer productivity, while Laravel Blade provides superior efficiency in terms of latency and bandwidth usage.

Data security in web services is a critical aspect that must be considered to prevent information leakage and unauthorized access. This study aims to analyze the security level of the Universitas Andalas Repository site, specifically regarding its vulnerability to sniffing attacks due to the use of the unencrypted HTTP protocol. The research employs a penetration testing method with an experimental approach. The testing process is carried out in three main stages: reconnaissance using Nmap to identify the services and protocols in use, sniffing using Wireshark to capture and analyze data packets, and evaluation of results based on modern web security standards to assess the level of risks found. The results of the study indicate that the Universitas Andalas Repository site still uses the HTTP protocol in its communication process, meaning that all data transmitted between the client and server can be read in plaintext. The Nmap scan results confirm that the web service operates on port 80 without SSL/TLS encryption support. Meanwhile, the packet analysis results using Wireshark show that both HTTP requests and responses can be captured and directly observed, including request parameters, cookies, and other potentially sensitive information. These findings suggest that the site has significant vulnerabilities to sniffing attacks and man-in-the-middle attacks, posing a potential risk to user data security.

This study designs and implements Bank Jali, a web-based bank queue system that applies a queue data structure with the First In First Out (FIFO) principle to improve service efficiency. The research and development method includes requirement analysis, design, implementation, testing, and evaluation. The application is built with HTML, CSS, and JavaScript, storing queue data temporarily through localStorage so the entire process runs client-side without a dedicated server. Key features include online queue registration, digital ticket generation, real-time status monitoring with waiting-time estimation, and an admin dashboard for managing teller and customer service queues. Testing shows the system operates reliably, processes queues according to FIFO, and provides a practical, lightweight user experience across devices.

Floods are the most frequent natural disasters and cause material and non-material losses. One of the problems faced is the lack of early warning when floods occur. This problem can be overcome with a flood early warning system. This paper discusses the solution to this problem, namely by designing and implementing a real-time flood early warning system using IoT-based Internet of Things (IoT) technology ESP32 MQTT and APK Kodular. The objective of this research, compared to previous studies, shows a gap in the methods used. While previous studies used an IoT-based flood warning system that sends data via SMS or an HTTP server, this study applies real-time monitoring with the MQTT protocol, which allows sending water level data with low latency to the Kodular application for faster and more responsive warnings. The method used is to connect hardware with IoT where ESP32 is a client that sends data to MQTT and will display it in the Kodular APK. This flood early warning system consists of: ultrasonic sensors, ESP32, MQTT cloud, OLED, buzzer, LED, and APK on the phone to receive notifications through a mobile application created using Kodular. This IoT-based system is installed in the Kudu Regency river and can monitor water levels in real-time. Based on a predetermined threshold, the system can activate the LED indicator or buzzer and send an early warning message to the user via the APK on the phone. Test results show that this system functions effectively in providing flood warnings with an accuracy of 1-2 cm and in a timely manner, making it suitable for community-based flood monitoring solutions

Automatic Speech Recognition (ASR) for the Indonesian language faces significant challenges due to high Word Error Rate (WER), especially when using pre-trained models without fine-tuning. This study develops an optimized ASR system using a hybrid cloud architecture that integrates the Faster-Whisper large-v3 engine with advanced audio preprocessing techniques. The system adopts a distributed architecture, with Google Colab (Tesla T4, 15GB VRAM) as the GPU server and Ubuntu 22.04 LTS (8 core, 32GB RAM) as the client. Evaluation was conducted on five Indonesian audio samples covering formal news, informal conversations, and long-duration recordings. The system achieved an 80% success rate in processing, with WER ranging from 27.69% (formal news) to 645.16% (informal conversations). Resource utilization was also efficient, with 21.3% GPU usage and 35.4% RAM usage. Processing time remained stable for normal-sized files but experienced timeouts on large files (>50MB). The results indicate that hybrid cloud architecture is feasible for distributed ASR processing in Indonesian, with several areas still open for optimization toward production deployment.

Perkembangan dunia teknologi informasi saat ini semakin cepat memasuki berbagai bidang, sehingga semakin banyak perusahaan yang berusaha meningkatkan usahanya terutama dalam bidang bisnis yang sangat berkaitan erat dengan teknologi informasi itu sendiri. Di dukung oleh pernyataan bahwa kegunaan komputer pada aplikasi bisnis adalah untuk menyediakan informasi dengan cepat dan tepat. Informasi ini ibarat darah yang mengalir di dalam tubuh suatu perusahaan. Jika suatu perusahaan, informasi tersebut terhenti atau terhambat, maka sistem perusahaan akan menjadi lusuh. Salah satu perkembangan teknologi informasi yang penting adalah semakin di butuhkannya penggunaan alat pengolah data yang berfungsi untuk menghasilkan informasi yang dibutuhkan. Perusahaan-perusahaan yang ingin mengembangkan usaha dan mencapai sukses harus mengikuti era informasi dengan menggunakan alat pendukung pengolah data yaitu komputer. Hal ini didukung oleh pernyataan yang di utarakan bahwa komputer di gunakan untuk mengelola sumber daya yang luas dari perusahaan-perusahaan yang memandang seluruh dunia sebagai pasar mereka di mana pada eksekutif perusahaan melakukan investasi pada teknologi informasi Kata Kunci: Sistem absensi barcode,Sofware Visual besic.

This research proposes a time-based dynamic port knocking technique on Mikrotik routers to enhance SSH access security. The system uses an algorithm for port calculation that changes according to the server’s time, requiring a different knocking sequence for each access session. The technique involves three consecutive knocking stages, where each stage must be passed in order for SSH access to be granted. The results show that this method is effective as a two-factor authentication mechanism, limiting access only to clients who understand the port calculation algorithm. Moreover, this system helps prevent brute-force attacks more efficiently by changing the port every minute, making it more difficult for unauthorized parties to launch an attack. Therefore, this method offers a more dynamic, adaptive, and flexible SSH security solution that can effectively address modern cybersecurity threats.

The sport of fencing is centered on skill tactics like cutting, stabbing, or using hand agility to parry an opponent's sword. In fencing, athletes must have strong reflexes and focus in order to both attack and evade attacks from opponents. An LED lamp, a buzzer, and an ultrasonic sensor were used in the tool's design. When the athlete runs toward the sensor—which is identified by a buzzer that sounds and an LED that illuminates—the gadget functions as follows: the athlete waves his hand at the sensor. The distance between the instruments is positioned according to the athlete's needs and skill level. The website that has been developed will show the ultrasonic sensor's detecting findings. The website's architecture allows for multiple tool function configurations, including training mode, tool delay, tool duration, tool detection distance, and indicators of the number of connected sensors. When the tool's durability was tested against distance, it was found to be able to establish a connection between the client and server up to 20 meters away with an average connected time of 27.39. The tool's delay test yields an average of 14.57 seconds. an average of 0.078 when the tool's point inaccuracy is tested.

Electricity is a primary human need today. Because nowadays all equipment is electronic-based, it allows the use of large amounts of power every day. It can be seen clearly that every year the use of electricity is increasing. An example that we can see the development of the times at this time, so many restaurants are emerging. Each restaurant requires a large amount of electrical power for their production equipment. With the need for large electrical power, a tool is also needed to be able to monitor the power. One of the advances that can be felt is in the field of control, currently with the network technology, computers can be solved, especially those based on the internet / IOT (Internet Off Things) which have grown rapidly making the problem of distance and time barriers can be solved solution and time. The interface used for operation is App Invetor, which system-wise, App Inventor consists of two components, namely the server and the client. The App Inventor server functions to store all program assets and provide other services related to application (project) file management.

In an increasingly interconnected world, computer networks play a crucial role in business operations. This research focuses on the analysis of the client-server network system at PT. XYZ, which shares a building with several other companies. The objective is to evaluate the current network infrastructure, identify potential issues, and propose improvements to enhance performance and security. A qualitative approach was employed, utilizing case study methods, interviews, and observations to gather in-depth data on the network's configuration, IP address management, and security measures. The findings indicate that while the existing network functions adequately, there are significant risks associated with user access rights and the need for regular maintenance. The implications of this study suggest that implementing stricter security policies and upgrading bandwidth could mitigate risks and improve overall network reliability, thereby supporting business productivity.

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.

At this moment, IoT technology was implemented in a broader area. The development of IoT technology can help human life become more manageable. IoT systems can help human activity through the natural time control system provided before. But there are some drawbacks when implementing the IoT system. One of them is the transmission process in the networking area. It’s happened because of weather, and other natural problems. Sometimes, IoT transmission can’t reach on time. It can make errors reading data on the user side. We proposed a transmission system, namely a Hybrid MP-QUIC transmission protocol, for helping in sending the data. Using this transmission protocol can reduce the response time between client and server.

Building a computer network needs significant care in selecting a configuration to ensure its efficacy and efficiency. It involves decisions about network topology, types, and device use. Security measures are essential for protecting networks with internet access from external attacks. A study conducted at an Islamic university in Indonesia indicated the use of a star network architecture and a client-server network model. The servers utilize Debian Linux. The university's security infrastructure includes a server authentication system and the setting up of a Virtual Private Network (VPN). If the server authentication difficulty is caused by a power outage, it is recommended that you use an UPS (uninterruptible power supply) to preserve power stability. Overall, security methods show up to be more effective when firewalls are installed.

This research begins with data collection through a combination of interview, observation, and literature study techniques. The problem analysis found was the slow sales service and purchase process at the store. The further impact is customer disappointment and the use of more time and energy resources. The solution offered in this research is the design of a computer-based information system that integrates workflow and optimal utilization of client server-based computer technology. The analysis in this study is presented in the form of a flowchart of the new system to be developed and analysis of the data structure using the Entity Relationship Diagram technique. Then the design results are presented in the form of a representative form design with workflow analysis described in the analysis and deployment diagram that illustrates how the system will be distributed with a client server computer technology approach. In conclusion, it is explained that the new system proposed in this design has been successfully presented logically, systematically, and easily developed into an integrative and systematic software project.

SDI Umamapu currently uses a Telkom Internet Service Provider (ISP) internet connection with a bandwidth capacity of 50 Mbps, which is only used in the principal's office and laboratory and does not cover other SDI Umamapu educational areas and limits SDI Umamapu teachers and staff from carrying out related tasks. with the Internet network. Therefore, the aim of this research is to design an Internet network using Mikrotik to help teachers and staff work more efficiently and expand the coverage area of ​​the SDI Umamapu Internet network. Apart from that, the SDI Umamapu Online Computer-Based National Examination (UNBK) is facilitated by 30 computers/laptops connected to the Internet network and other clients. In conducting research, the author uses the Network Development Life Cycle (NDLC) methodology: analysis, design, simulation, implementation, management and monitoring to build an Internet network to solve research problems. Through this research the author can learn a little more about the concept of a hotspot network and its configuration which can provide the author with knowledge about the advantages and disadvantages of Mikrotik RouterOS as a hotspot server. When measured from the results of QoS (Quality of Service) analysis before implementation, the throughput was 36.238 kbit/s (Kbps), packet loss was 1.3%, average delay was 0.389072 seconds, and throughput was 1.5% after implementation. 161.657 kbit/s (kilobits per second), average latency 0.5157133 seconds, packet loss 36%. This means that the speed of Internet access at SDI Umamapu has decreased by up to 36% due to the increase in the area of ​​the Internet network. However, even though network performance has decreased, the newly created Internet network continues to function well and smoothly.  

Seiring dengan merebaknya penyakit yang banyak menyerang sapi maka penulis mengangkat judul Sistem pakar dengan metode forward chainning. sistem pakar adalah ilmu informasi yang berisi  seorang pakar sehingga  layak menjadi seorang pakar,  aplikasi ini dirancang dengan basis pengetahuan  fakta dan  penalaran,  dari kumpulan data - data faktual dengan mencari aturan atau gejala gejala yang sesuai hipotesis dapat digunakan untuk menentukan penentuan gejala yang sudah diidentifikasi. Perancangan aplikasi ini  berbasis mobile dengan bahasa pemrograman Java pada Android sebagai client dan database MySQL sebagai server dengan  PHP sebagai link login sehingga aplikasi ini sangat mudah digunakan dan cepat saat ingin mengakses aplikasi tersebut.  expert sistem (sistem pakar) juga dikenal sebagai sistem yang berusaha menerapkan     pemikiran manusia untuk kemudian diimplementasikan dalam  perangkat lunak, sehingga komputer dapat menyelesaikan masalah Topik seperti yang biasanya dilakukan oleh seorang profesional dalam sistem pakar ini menggunakan metode forward chainning  forward chainning ini menggunakan aturan  (if) kemudian dilanjutkan pada kesimpulan atau informasi turunan (then) sehingga menemukan fakta yang dapat ditarik sebagai kesimpulan. Forward chaining berarti menggunakan set aturan tindakan bersyarat. Teknik ini menggunakan data untuk menentukan aturan mana yang akan dieksekusi, atau  menambahkan data ke memori  untuk diproses guna menemukan hasilnya.

Recording financial transactions is an important activity that must be carried out by a business. In accounting, recording financial transactions is a fundamental thing that must be done. With these records, all business financial transactions can be accounted for and brought to the financial statements. Computerized technology using barcodes in payment transactions has the aim of increasing speed, accuracy, and service quality. In carrying out payment administration activities still using the manual system will have an impact on the Administrative officer having difficulty finding data on students who want to pay and the network (LAN) has not been implemented on the computer is also a problem at the research site, because to share data with the treasurer and principal becomes constrained, data can be damaged, lost or misused because its security is not guaranteed. In solving these problems, the researchers collected data and facts that existed at the research site, then designed a payment administration information that was in accordance with the needs of the school. In making Administrative Information System Integrated With Barcode Reader, researchers used Microsoft Visual Basic 6.0 programming language, MySQL Server database as data storage media and Subtime Text as tools to create source code. In the preparation of this application using object-oriented methods.

The Mranggen III Health Center is one of the government agencies in the technical implementing unit of the Demak District health office. Patient registration services and administrative payments at the Mranggen III Health Center are still conventional, causing long queues. In addition, the process of processing data to become information cannot be accessed directly by the leadership because there are no computerized and multi-user or client-server applications. Based on these problems, a Puskesmas administration information system design was made that could suit the needs. Making an information system using the programming language Microsoft Visual Basic 6.0 and SQL Server 2000 as a multiuser-based database. With the design of the development of an administrative information system for the Mranggen III Health Center, it is hoped that it will be able to handle the problems that exist in the Mranggen III Health Center, namely being able to speed up service to patients and by using a multiuser-based information system. Leaders and several staff can access it simultaneously and quickly.

Technological developments at this time are very advanced in various ways, inviting everyone to find new discoveries, therefore an information processing work system that is fast, precise and accurate is expected to improve service to consumers to achieve goals. MA Miftahul Ulum Ngemplak administration includes payment of Education Development Contribution (SPP), extracurricular money (including: scouts, computers, volleyball and drum bands) and Intra-School Student Organization (OSIS) money up to the preparation of financial reports every day, every month to every years to be reported to interested parties, such as the school treasurer, principal and head of the foundation, and all these payments are still recorded manually. This system has a weakness, namely in terms of recording school administration payments it is less effective because it has to record in triplicate, namely on student payment cards, daily data payment report books, and monthly data payment report books, as well as the process of finding data and submitting student payment reports is not fast. With the existence of a system, it is hoped that later the design can assist in the transaction process for paying tuition fees, UTS, UAS and all expenses at MA Miftahul Ulum Ngemplak, besides being able to produce software applications that aim to increase productivity and support facilities in administrative activities, especially tuition payments. , UTS, UAS and expenditure transactions at MA Miftahul Ulum Ngemplak and the recording process becomes more effective because recording is only once during the school financial administration payment process and speeds up the process of searching for data and submitting school financial administration payment reports