Based on the characteristics of blockchain such as decentralization, independence, security and anonymity, audit entities can explore the feasibility and application logic of its application in food security audits by leveraging technologies such as smart contracts, consensus mechanisms, asymmetric encryption and distributed ledgers. The article first analyzes the current situation and problems of food security auditing at both the practical and theoretical levels. Then, it constructs a logical framework for the application of blockchain technology in food security auditing by combining the advantages of blockchain technology, and specifically elaborates on the food security auditing process under blockchain technology. Finally, fully consider the problems faced by blockchain technology in its application and make prospects for its future development.
In recent years, various digital currencies have emerged, among which Bitcoin has been widely accepted as an alternative to sovereign currencies for commodity trading. However, the dramatic volatility of bitcoin prices can pose a risk to global financial markets. In this paper, we firstly construct a more comprehensive forecasting index system from seven aspects, and then construct a VMD-GRU model. This model uses the variational modal decomposition (VMD) to decompose the time series into intrinsic mode functions (IMFs) and use gated recurrent unit (GRU) to forecast different IMFs. This paper also compares the forecast results with classical machine learning models and deep learning models, and the results show that the forecast accuracy of the VMD-GRU model is more than 16% better than other models.
Dayong Pu, Tao Li, Zhaoqi Jin, Shihan Liu ¡ 5 authors
With the development of the Internet of Things (IoT) and intelligent transportation systems, networked toll systems have become an essential part of modern traffic management. However, traditional identity authentication mechanisms rely on centralized trust institutions, which are prone to issues such as vulnerability to data storage attacks, identity information leakage, and poor interoperability between systems. These problems not only compromise the security and stability of toll systems but also risk user privacy and economic losses. To address these challenges, this paper proposes a distributed identity authentication mechanism based on blockchain technology. This mechanism leverages the decentralized, tamper-resistant, and smart contract features of blockchain technology to achieve an identity authentication process without the involvement of centralized institutions by storing user identity information in a distributed manner on the blockchain. The system utilizes distributed ledger technology to record identity authentication information across multiple nodes, thereby eliminating the risk of single-point failures and ensuring data consistency and integrity through consensus algorithms. Additionally, an automated identity authentication process based on smart contracts is designed to enable efficient identity verification between different networked toll subsystems, ensuring the security of the authentication process and consistency of user experience. The blockchain-based distributed identity authentication mechanism not only enhances the overall security level of networked toll systems but also provides a new solution for identity authentication in intelligent transportation systems.
Diana Stepanova, N. B. A. Yousif, Raya Karlibaeva, Alexey Mikhaylov
In this regard the key factor determining the success of the mining industry is the cost of electricity. By understanding the risks associated with crypto mining industry. The method is based on systemic literature review and bibliometric analysis exploring keyword âbitcoin miningâ. This review paper studies 50 papers for the period of 2019â2023. The results propose recommendations for crypto miners. Currently, the results confirm that bitcoin mainly depends on the consumption of inexpensive electricity. Consequently, the bitcoin network predominantly uses energy in regions where it is abundant and cannot be stored or exported. Most miners rely on electricity generated from hydroelectric power plants, geysers and geothermal sources, which are not easy to transport or store. Bitcoin will continue to look for such cost-effective and underutilized energy sources, as mining in urban areas or industrial centers will remain financially unviable. If the price of bitcoin stabilizes and a sufficient number of miners enter the market, it is quite possible that in the near future we may witness a fivefold increase in their energy consumption.
Nodes in Mobile Ad Hoc Networks (MANETs) are limited battery powered. Thatâs why energy efficient routing has become an important optimization criterion in MANETs. The conventional routing protocols do not consider energy of the nodes while selecting routes which leads to early exhaustion of nodes and partitioning of the network. This paper attempts to provide an energy aware routing algorithm. The proposed algorithm finds the transmission energy between the nodes relative to the distance and the performance of the algorithm is analyzed between two metrics Total Transmission energy of a route and Maximum Number of Hops. The proposed algorithm shows efficient energy utilization and increased network lifetime with total transmission energy metric.
Cryptocurrency has become a pivotal player in global financial transactions due to its decentralized mining process, which eliminates the need for intermediaries. However, the operation of cryptocurrency mining devices (CMDs) requires significant electrical power, leading to an increase in network-connected cryptocurrency mining loads (CMLs) that pose challenges for power grid operators. This paper evaluates the integration of CMLs into power grids, focusing on distribution network performance. A technology-accepted model for assessing cryptocurrency mining performance is presented, along with an analysis of the impacts of high CML penetration on power grid planning and operation. Findings reveal that high CML penetration can complicate load forecasting, congest transmission lines, and increase the coincident peak load in distribution networks. A case study of Iranâs power network indicates that CMLs account for approximately 2.8% of the nationâs electricity consumption. Furthermore, if 5% of residential customers in Tehran install CMDs, the average coincident peak demand for this group rises by 26.81%. Additionally, the average power factor of a sample CMD is about 0.99, while total current distortion and third harmonic current exceed permissible limits, indicating potential power quality issues. This study highlights the challenges posed by CMLs and proposes strategies for their sustainable integration into power grids.
With the advantages of mass storage and easy expansion, distributed storage architecture has become the main way of user big data storage, but the confidentiality, integrity and availability of data are facing serious challenges.As a new distributed shared ledger, blockchain technology has become an important technology to ensure data security since it was proposed by virtue of its characteristics of decentralization, tamper-proof and anonymity.Based on blockchain technology, this paper studies the key technology and application scheme design of data distributed storage, and verifies the feasibility of the scheme.
This research aims to develop a tool to assess the impact of social media on the market by collecting and analyzing cryptocurrency-related tweets on Twitter.Python and relevant libraries are utilized for scraping tweets and cryptocurrency trading data, followed by data preprocessing.The VADER model is then employed for sentiment analysis of the tweets, extracting sentiment polarity and intensity.Considering the influence of tweets, an overall sentiment score is calculated.
Most of the blockchain-based identity authentication systems are based on public blockchain, which are still essentially traditional centralized identity management and verification methods, making it difficult to meet the needs of trusted access and fine-grained access control in microgrids. Therefore, based on the FISCO BCOS consortium blockchain technology, a distributed identity authentication system supporting multi-center was designed. A DID-based identity management protocol to achieve autonomous control of user identity in a practical scenarios was designed. Distributed trusted access technology for end nodes in microgrids was studied, and privacy-protecting credentials based on zero-knowledge proof were designed. This scheme meets the requirements of trustworthy and verifiable user identity in different privacy security scenarios, and achieves autonomous control of entity identity, fine-grained access control and trusted data exchange. The usability and effectiveness of the proposed algorithm are demonstrated through system experiments and performance analysis.
Abstract As a decentralized, open, transparent, fair and peer-to-peer distributed database technology, blockchain has the technical characteristics of anti-counterfeiting, anti tampering, traceability and efficiency improvement, which had attracted the attention of many industries including energy and power industry. This paper first analyzed the pain points such as data security sharing, power transaction security and power transaction mode and so on, in current energy and power business, expounded the role of blockchain in solving the above business pain points. Then designed an application framework of blockchain in power business, and illustrated power transaction and supply chain finance to describe the application of blockchain. Finally, prospected the application prospect of blockchain in power industry.
With the successful application of Bitcoin, the underlying blockchain technology has been attracted the attention by more and more scholars, financial institutions and commercial companies. Blockchain technology integrates some key technologies such as finance, cryptography, computer science, and game theory, and builds a distributed record system that is decentralized, mutually trusted, and tamper-proof. This paper demonstrates the basic principles and features of blockchain, then analyzes the key technologies and characteristics of blockchain technology including asymmetric encryption, P2P, consensus mechanisms, smart contracts. In the last part of the paper, the author summarizes the potential application scenarios to blockchain and focuses on applications of the blockchain technology in the power industry.
The CPS system senses and recognizes the physical world through numerous node devices and processes the collected data accordingly, then it can achieve the interconnection of the physical world and the virtual network world. However, under the existing conditions, the CPS system has not yet realized the interconnection between nodes and nodes and the physical world. Block chain technology is a distributed ledger in which nodes can freely enter and exit. This article proposes to combine the block chain with the CPS system to improve the efficiency and security of the CPS system. Through theoretical analysis and experiments, it is proved that the combination of block chain and CPS system can effectively improve the scalability of CPS system and improve the ability of CPS system to communicate with the physical world. Through the combination of the public chain and private chain of the block chain, the production speed of the block is improved, and the actual demand of the CPS system is better satisfied.