In this paper, we propose a decentralized access control scheme for supply chain finance, which takes credit score as an important basis for access policy, establishes a credit score model by using XGBoost algorithm, and mines credit risk characteristics based on user's historical data, so as to improve the assessment accuracy and decision-making reliability. Experiments show that smart contracts can automate the execution of access policies, optimize process efficiency while ensuring transparency and security, and provide stable system performance with good scalability. At the execution level, smart contracts are used to automate the assessment of user credit, ensure the real-time and tamper-proof judgement of privileges, and improve the transparency and security of the system. The experimental results show that the constructed system has good performance stability and scalability in a multi-node environment.
This study aims to improve execution time, CPU utilization, network efficiency, and scalability while upholding robust security measures. The IOTA-DLT-based RA-WRW algorithm is developed in Python, considering node resources and transaction weights for optimal tip selection—verification procedures confirming tip authenticity and transaction validity. The algorithm significantly improves IOTA network transaction processing efficiency tips exhibit high authenticity and consistency, affirming the algorithm's effectiveness. The research presents the innovative IOTA-DLT RA-WRW algorithm, which integrates Resource Allocation (RA) and Weighted Random Walk strategies. This novel approach tackles challenges like lazy tip selection, network congestion, and double spending. By performance parameter and the tip selection process, the algorithm improves comparative analyses against existing methods and confirms the superior performance of our model, boasting high accuracy, f-measure, recall, precision, and scalability in distributed ledger transactions, significantly enhancing the IOTA network's transaction processing capabilities. DOI:https://doi.org/10.52783/pst.1006
Governments and businesses typically utilize tenders or contracts to purchase products or services. When improper techniques are used, improper tender management results in significant losses. This covers issues including favoritism of contractors, poor record-keeping, lack of openness, hacking, data tampering, and other things. We have employed a straightforward and secure block chain method to address this issue. One such technology that has recently caught the interest of governments all around the world is blockchain technology. The blockchain has the possibility to enter many domains thanks to its increased security, enhanced traceability, and least expensive infrastructure. To enable a completely transparent bidding process, we use block chain technology in this scenario to secure transaction-based documents such as tender documents, applications, bid proposals, firm profiles, prior performance records, approval officer details, and rejection details.
Jonas L de Vilas Boas, Antônio Marcos Alberti, Joel J. P. C. Rodrigues
The complementarity of distributed ledger technologies such as Blockchain and the Internet of Things has gained increasing attention in the literature. In order to facilitate the immutable validation and registration of the data collected by the devices, the so-called smart contracts have been used and distributed applications have been developed to increase the adhesion of the actors. Thus, this work presents a tool for experimentation to evaluate the performance and scalability of distributed applications in the context of the Internet of Things. The proposed tool is flexible and allows experimentation with different technologies and configurations. This work contributes to the convergence among immutable information recording, deterministic computation, and sensing of physical world quantities.
This paper discuss the smoke sensor and the relay control in the smart home.STM32 is used as the central part of the whole system and LwIP protocol is also applied to transfer data. The system uses the MQ-2 smoke sensor detect the concentration of combustible gases in air, and uses the SRD-05VDC-SL-C to close and cut off the circuit. The paper also discuss the sensitivity characteristics and the temperature and humidity effect of the smoke sensor. At the end of the paper, it is given the C code in the KEIL MDK environment.