scholarly journals Research on Blockchain-Based E-Bidding System

2021 ◽  
Vol 11 (9) ◽  
pp. 4011
Author(s):  
Dan Wang ◽  
Jindong Zhao ◽  
Chunxiao Mu
Keyword(s):  
Data Transmission ◽  
Privacy Protection ◽  
Graph Isomorphism ◽  
Third Party ◽  
Business Logic ◽  
Core Concept ◽  
The Core ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Bidding Process

In the field of modern bidding, electronic bidding leads a new trend of development, convenience and efficiency and other significant advantages effectively promote the reform and innovation of China’s bidding field. Nowadays, most systems require a strong and trusted third party to guarantee the integrity and security of the system. However, with the development of blockchain technology and the rise of privacy protection, researchers has begun to emphasize the core concept of decentralization. This paper introduces a decentralized electronic bidding system based on blockchain and smart contract. The system uses blockchain to replace the traditional database and uses chaincode to process business logic. In data interaction, encryption techniques such as zero-knowledge proof based on graph isomorphism are used to improve privacy protection, which improves the anonymity of participants, the privacy of data transmission, and the traceability and verifiable of data. Compared with other electronic bidding systems, this system is more secure and efficient, and has the nature of anonymous operation, which fully protects the privacy information in the bidding process.

scholarly journals Distributed E-Voting and E-Bidding Systems Based on Smart Contract

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 422 ◽  
Author(s):  
Raylin Tso ◽  
Zi-Yuan Liu ◽  
Jen-Ho Hsiao
Keyword(s):  
Data Transmission ◽  
Third Party ◽  
Electronic Voting ◽  
Technology Research ◽  
Guarantee System ◽  
Blockchain Technology ◽  
System Integrity ◽  
Smart Contract ◽  
Cryptographic Techniques ◽  
Opening Phase

Traditional voting and bidding systems largely rely on paperwork and human resources throughout the voting process, which can incur high costs in terms of both time and money. Electronic voting and electronic bidding systems can be used to reduce costs, and many new systems have been introduced. However, most systems require a powerful and trusted third party to guarantee system integrity and security. With developments in blockchain technology, research has begun to highlight the core concept of decentralization. In this study, we introduce the first decentralized electronic voting and bidding systems based on a blockchain and smart contract. We also use cryptographic techniques such as oblivious transfer and homomorphic encryptions to improve privacy protection. Our proposed systems allow voters and bidders to participate in the opening phase and improve participant anonymity, the privacy of data transmission, and data reliability and verifiability. Moreover, compared with other electronic voting and bidding systems, our systems are safer and more efficient.

The Potential Of Blockchain Technology To Change International Mobile Roaming Business Model

2019 ◽  
Vol 5 (1) ◽  
pp. 15-22
Author(s):  
Ardian Thresnantia Atmaja
Keyword(s):  
Business Model ◽  
Current Situation ◽  
Business Value ◽  
Third Party ◽  
Fundamental Aspect ◽  
Clearing House ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Target Architecture ◽  
Architecture Development

The key objectives of this paper is to propose a design implementation of blockchain based on smart contract which have potential to change international mobile roaming business model by eliminating third-party data clearing house (DCH). The analysis method used comparative analysis between current situation and target architecture of international mobile roaming business that commonly used by TOGAF Architecture Development Method. The purposed design of implementation has validated the business value by using Total Cost of Ownership (TCO) calculation. This paper applies the TOGAF approach in order to address architecture gap to evaluate by the enhancement capability that required from these three fundamental aspect which are Business, Technology and Information. With the blockchain smart contract solution able to eliminate the intermediaries Data Clearing House system, which impacted to the business model of international mobile roaming with no more intermediaries fee for call data record (CDR) processing and open up for online billing and settlement among parties. In conclusion the business value of blockchain implementation in the international mobile roaming has been measured using TCO comparison between current situation and target architecture that impacted cost reduction of operational platform is 19%. With this information and understanding the blockchain technology has significant benefit in the international mobile roaming business.

scholarly journals Discussion on Payment Application in Cross-border E-Commerce Platform from the Perspective of Blockchain

2021 ◽  
Vol 235 ◽  
pp. 03020
Author(s):  
Qian Liao ◽  
Mimi Shao
Keyword(s):  
Information Leakage ◽  
Consumer Information ◽  
Third Party ◽  
Cross Border ◽  
Blockchain Technology ◽  
Distributed Ledger ◽  
Smart Contract ◽  
Cash Payment ◽  
Asymmetric Encryption ◽  
Further Development

Features like the distributed ledger, consensus mechanism, asymmetric encryption technology, smart contract and Token of blockchain can lower transaction cost, enhance trust between customers and merchants, as well as eliminate false payment and consumer information leakage, problems which are common in current payment of cross-border E-Commerce platform. Based on the analysis of existing scholars, this paper studied two payment models: digital cash payment based on blockchain technology and the application of blockchain in third-party payment platform. Then the paper discussed the mechanism of blockchain in cross-border e-commerce payment platform, and creatively proposed a blockchain cross-border e-commerce payment platform, serving as reference and guidance for further development of blockchain technology in cross-border payment.1

scholarly journals Reliable Task Management Based on a Smart Contract for Runtime Verification of Sensing and Actuating Tasks in IoT Environments

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1207 ◽  
Author(s):  
Lei Hang ◽  
Do-Hyeun Kim
Keyword(s):  
Access Control ◽  
Comprehensive Evaluation ◽  
Runtime Verification ◽  
Security And Privacy ◽  
Raspberry Pi ◽  
Task Management ◽  
Business Logic ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Networking Technologies

With the gradual popularization of Internet-of-Things (IoT) applications and the development of wireless networking technologies, the use of heterogeneous devices and runtime verification of task fulfillment with different constraints are required in real-world IoT scenarios. As far as IoT systems are concerned, most of them are built on centralized architectures, which reveal various assailable points in data security and privacy threats. Hence, this paper aims to investigate these issues by delegating the responsibility of a verification monitor from a centralized architecture to a decentralized manner using blockchain technology. We present a smart contract-based task management scheme to provide runtime verification of device behaviors and allows trustworthy access control to these devices. The business logic of the proposed system is specified by the smart contract, which automates all time-consuming processes cryptographically and correctly. The usability of the proposed solution is further demonstrated by implementing a prototype application in which the Hyperledger Fabric is utilized to implement the business logic for runtime verification and access control with one desktop and one Raspberry Pi. A comprehensive evaluation experiment is conducted, and the results indicate the effectiveness and efficiency of the proposed system.

scholarly journals Blockchain Technology and It’s Applications in E-Governance Services

2019 ◽  
Vol 8 (4) ◽  
pp. 5795-5802
Keyword(s):  
Supply Chain ◽  
Data Structure ◽  
Open Source ◽  
Smart Cities ◽  
Third Party ◽  
Technical Aspects ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Peer Network ◽  
Peer To Peer Network

Blockchain Technology is one of the most popular technologies of present days. This technology has the capability to eliminate the requirement of third party to validate the transactions over the Peer-to-Peer network. Due to various features of Blockchain like smart contract, consensus mechanism, network transactions are completed securely, efficiently and timely. This technology is very useful in many areas including medical, IoT, e-Governance services, smart cities, taxation, supply chain, banking etc. In this paper, we discuss the Blockchain Technology in detail, its data structure, open source platform like Ethereum and Hyperledger, technical aspects of this technology, possible applications of this technology, challenges and limitations in adaptation of this technology.

Blockchain Based Bidding System

2021 ◽  
Vol 9 (VIII) ◽  
pp. 51-53
Author(s):  
Mr. C. K Srinivas
Keyword(s):  
Third Party ◽  
Start Time ◽  
Plain Text ◽  
The Public ◽  
Aes Algorithm ◽  
Cipher Text ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Sealed Bid ◽  
Final Output

The E-auction, one of the most common e-commerce events, allows bidders to bid directly on the Internet. As with the sealed deal, additional transaction costs are needed with intermediaries, as the third party plays an essential role between buyers and sellers in helping to negotiate both during the auction. In fact, it never confirms that a third party is trustworthy. To solve the problems, we propose the low transaction cost blockchain technology which is used to build the public bid and sealed bid smart contract. The smart contract consists of the Auctioneer address, the start time for the auction, the deadline, the current winner's address, and the current highest price. The project demonstrates the bidding framework with blockchain technology. This bidding application prepared by using Advanced Encryption Standard(AES) Algorithm. This algorithm contains AES cipher specifiers the number of repetitions of transformation rounds, that converts the input called the plain text, then into the final output called cipher text.

scholarly journals SLA-Based Sharing Economy Service with Smart Contract for Resource Integrity in the Internet of Things

2019 ◽  
Vol 9 (17) ◽  
pp. 3602 ◽  
Author(s):  
Lei Hang ◽  
Do-Hyeun Kim
Keyword(s):  
Performance Metrics ◽  
Service Level Agreement ◽  
Dynamic Environment ◽  
Experimental Tests ◽  
Service Level ◽  
Sharing Economy ◽  
Third Party ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Trading Partners

Recently, technology startups have leveraged the potential of blockchain-based technologies to govern institutions or interpersonal trust by enforcing signed treaties among different individuals in a decentralized environment. However, it is going to be hard enough convincing that the blockchain technology could completely replace the trust among trading partners in the sharing economy as sharing services always operate in a highly dynamic environment. With the rapid expanding of the rental market, the sharing economy faces more and more severe challenges in the form of regulatory uncertainty and concerns about abuses. This paper proposes an enhanced decentralized sharing economy service using the service level agreement (SLA), which documents the services the provider will furnish and defines the service standards the provider is obligated to meet. The SLA specifications are defined as the smart contract, which facilitates multi-user collaboration and automates the process with no involvement of the third party. To demonstrate the usability of the proposed solution in the sharing economy, a notebook sharing case study is implemented using the Hyperledger Fabric. The functionalities of the smart contract are tested using the Hyperledger Composer. Moreover, the efficiency of the designed approach is demonstrated through a series of experimental tests using different performance metrics.

scholarly journals Blockchain: Future of Accounting Education

2020 ◽  
Vol 12 (2) ◽  
pp. 14
Author(s):  
Munshi Samaduzzaman
Keyword(s):  
Transaction Cost ◽  
Low Cost ◽  
Accounting Education ◽  
Third Party ◽  
Accounting System ◽  
Accounting Standard ◽  
Peer Communication ◽  
Blockchain Technology ◽  
Distributed Ledger ◽  
Smart Contract

Blockchain will be the future of accounting education. Triple entry accounting system is here, and shared ledger has been considered. From the shared ledger different parties can access transactions. As our discussion reveals that distributed ledger, Smart contract and Blockchain are three important elements in the triple entry accounting system. As a result, blockchain technology is helping the upgrading the process of education system. Blockchain technology is a peer to peer communication that allows participants to secure the settlement of transactions, achieve the transactions and transfer of assets at low cost. With certain advantages there are disadvantages too. Based on performance and acceptance, it is clear that in future the implication of blockchain technology would be developed. The concept of triple accounting has introduced the new way of accounting work replacing accounting standard formula. The blockchain technology eliminates the involvement of third party, maintain transparency and charges low transaction cost. It will save money and time of people as it is secure and due to decentralization, it is not controlled by one single entity. Due to the decentralization, every user of the network can see the file. So, blockchain should the part the Accounting Education in future.

scholarly journals Prototyping a Smart Contract Based Public Procurement to Fight Corruption

Computers ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 85
Author(s):  
Tim Weingärtner ◽  
Danielle Batista ◽  
Sandro Köchli ◽  
Gilles Voutat
Keyword(s):  
Information Disclosure ◽  
Public Procurement ◽  
Smart Contracts ◽  
The Public ◽  
Blockchain Technology ◽  
Smart Contract ◽  
Sample Data ◽  
Procurement Procedure ◽  
Delivery Verification ◽  
Bidding Process

Corruption in public procurement is a worldwide appearance that causes immense financial and reputational damages. Especially in developing countries, corruption is a widespread issue due to secrecy and lack of transparency. An important instrument for transparency and accountability assurance is the record which is managed and controlled by recordkeeping systems. Blockchain technology and more precisely blockchain-based smart contracts are emerging technological tools that can be used as recordkeeping systems and a tool to mitigate some of the fraud involving public procurement records. Immutability, transparency, distribution and automation are some of the features of smart contracts already implemented in several applications to avoid malicious human interference. In this paper, we discuss some of the frauds in public procurement, and we propose smart contracts to automatize different stages of the public procurement procedure attempting to fix their biggest current weaknesses. The processes we have focused on include the bidding process, supplier habilitation and delivery verification. In the three subprocesses, common irregularities include human fallibility, improper information disclosure and hidden agreements which concern not only governments but also civil society. To show the feasibility and usability of our proposal, we have implemented a prototype that demonstrates the process using sample data.

scholarly journals TFCrowd: a blockchain-based crowdsourcing framework with enhanced trustworthiness and fairness

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Chunxiao Li ◽  
Xidi Qu ◽  
Yu Guo
Keyword(s):  
Shapley Value ◽  
Smart Contracts ◽  
The Core ◽  
Blockchain Technology ◽  
Smart Contract ◽  
False Reporting ◽  
Critical Issues ◽  
Evaluation Mechanism ◽  
Core Idea ◽  
Cloud Servers

AbstractBlockchain technology has attracted considerable attention due to the boom of cryptocurrencies and decentralized applications. Among them, the emerging blockchain-based crowdsourcing is a typical paradigm, which gets rid of centralized cloud-servers and leverages smart contracts to realize task recommendation and reward distribution. However, there are still two critical issues yet to be solved urgently. First, malicious evaluation from crowdsourcing requesters will result in honest workers not getting the rewards they deserve even if they have provided valuable solutions. Second, unfair evaluation and reward distribution can lead to low enthusiasm for work. Therefore, the above problems will seriously hinder the development of blockchain-based crowdsourcing platforms. In this paper, we propose a new blockchain-based crowdsourcing framework with enhanced trustworthiness and fairness, named TFCrowd. The core idea of TFCrowd is utilizing a smart contract of blockchain as a trusted authority to fairly evaluate contributions and allocate rewards. To this end, we devise a reputation-based evaluation mechanism to punish the requester who behaves as “false-reporting” and a Shapley value-based method to distribute rewards fairly. By using our proposed schemes, TFCrowd can prevent malicious requesters from making unfair comments and reward honest workers according to their contributions. Extensive simulations and the experiment results demonstrate that TFCrowd can protect the interests of workers and distribute rewards fairly.

Sign in / Sign up

Export Citation Format

Share Document