Follow blockchain research across journals, conferences, and preprint repositories.
2,071 results · page 79 of 87
Francesco Fusco, Maria Ilaria Lunesu, Filippo Eros Pani, Andrea Pinna
No abstract is available for this record.
Ansgar Fehnker, Kaylash Chaudhary
No abstract is available for this record.
Hong Guo, Hongqiang Zheng, Kai Xu, Xiangrui Kong · 7 authors
No abstract is available for this record.
Neyire Deniz Sarier
No abstract is available for this record.
Gaby G. Dagher, Praneeth Babu Marella, Matea Milojkovic, Jordan Mohler
Voting is a fundamental part of democratic systems; it gives individuals in a community the faculty to voice their opinion. In recent years, voter turnout has diminished while concerns regarding integrity, security, and accessibility of current voting systems have escalated. E-voting was introduced to address those concerns; however, it is not cost-effective and still requires full supervision by a central authority. The blockchain is an emerging, decentralized, and distributed technology that promises to enhance different aspects of many industries. Expanding e-voting into blockchain technology could be the solution to alleviate the present concerns in e-voting. In this paper, we propose a blockchain-based voting system, named BroncoVote, that preserves voter privacy and increases accessibility, while keeping the voting system transparent, secure, and cost-effective. BroncoVote implements a university-scaled voting framework that utilizes Ethereum’s blockchain and smart contracts to achieve voter administration and auditable voting records. In addition, BroncoVote utilizes a few cryptographic techniques, including homomorphic encryption, to promote voter privacy. Our implementation was deployed on Ethereum’s Testnet to demonstrate usability, scalability, and efficiency.
Mingda Liu, Jing Shang, Peng Liu, Yijuan Shi · 5 authors
No abstract is available for this record.
Yinan Pei, Kazumasa Oida
No abstract is available for this record.
Yash Gupta, Rajeev Shorey, Amey Kulkarni, Jeffrey D. Tew
In this paper, we address the applicability of Blockchain technology to ensure security of data transmitted and received by the nodes in an Internet of Things (IoT) network. We propose a Blockchain consensus model that is suitable for resource constrained devices. We also propose a model for implementing IoT security on top of the Blockchain model. We simulate our proposed model to understand its feasibility.
Xinxin Fan
Stealth address prevents public association of a blockchain transaction's output with a recipient's wallet address and hides the actual destination address of a transaction. While stealth address provides an effective privacy-enhancing technology for a cryptocurrency network, it requires blockchain nodes to actively monitor all the transactions and compute the purported destination addresses, which restricts its application for resource-constrained environments like Internet of Things (IoT). In this paper, we propose DKSAP-IoT, a faster dual-key stealth address protocol for blockchain-based IoT systems. DKSAP-IoT utilizes a technique similar to the TLS session resumption to improve the performance and reduce the transaction size at the same time between two communication peers. Our theoretical analysis as well as the extensive experiments on an embedded computing platform demonstrate that DKSAP-IoT is able to reduce the computational overhead by at least 50% when compared to the state-of-the-art scheme, thereby paving the way for its application to blockchain-based IoT systems.
Dong Zheng, Kaixin Deng, Yinghui Zhang, Jiangfan Zhao · 6 authors
No abstract is available for this record.
Nishara Nizamuddin, Haya R. Hasan, Khaled Salah
No abstract is available for this record.
Baocheng Wang, Jiawei Sun, Yunhua He, Dandan Pang · 5 authors
Based on the blockchain, homomorphic ElGamal encryption and ring signature, an electronic voting scheme based on blockchain is proposed for large-scale voting, which has the properties of decentralization, self-management, non-interactive and free-receipt, furthermore the one-time ring signature ensures the anonymity of the vote trading in the blockchain. The public verifiable billboards guarantee the voting fair, and the miner nodes provides ciphertext ballot counting service makes large-scale voting feasible. Finally, we analysis the security of the blockchain voting system and present the performance in large-scale nodes.
Alexander Chepurnoy, Charalampos Papamanthou, Yupeng Zhang
No abstract is available for this record.
Kashif Mehboob Khan, Junaid Arshad, Muhammad Mubashir Khan
Electronic voting or e-voting has been used in varying forms since 1970s with fundamental benefits over paper-based systems such as increased efficiency and reduced errors. However, challenges remain to the achieving of wide spread adoption of such systems, especially with respect to improving their resilience against potential faults. Blockchain is a disruptive technology of the current era and promises to improve the overall resilience of e-voting systems. This article presents an effort to leverage benefits of blockchain such as cryptographic foundations and transparency to achieve an effective scheme for e-voting. The proposed scheme conforms to the fundamental requirements for e-voting schemes and achieves end-to-end verifiability. The article presents details of the proposed e-voting scheme along with its implementation using Multichain platform. The article also presents an in-depth evaluation of the scheme which successfully demonstrates its effectiveness to achieve an end-to-end verifiable e-voting scheme.
Yi Liu, Xingtong Liu, Chaojing Tang, Jian Wang · 5 authors
Bitcoin combines a peer-to-peer network and cryptographic algorithm to implement a distributed digital currency system, which keeps all transaction history on a public blockchain. Since all transactions recorded on the blockchain are public to everyone, Bitcoin users face a threat of leaking financial privacy. Many analysis and deanonymization approaches have been proposed to link transaction records to real identities. To eliminate this threat, we present an unlinkable coin mixing scheme that allows users to mix their bitcoins without trusting a third party. This mixing scheme employs a primitive known as ring signature with elliptic curve digital signature algorithm (ECDSA) to conceal the transfer of coins between addresses. The mixing server is only able to check whether the output addresses belong to its customers, but it cannot tell which address owned by which customer. Customers do not have to rely on the reputation of a third party to ensure his money will be returned, and his privacy will not be leaked. This scheme needs no modifications on current Bitcoin system and is convenient to deploy by any communities. We implemented a prototype of our scheme and tested it under the Bitcoin core's regtest mode. Security and privacy of our mixing scheme are ensured through the standard ring signature and ECDSA unforgeability.
Haya R. Hasan, Khaled Salah
There is an immense need of a proof of delivery (PoD) of today's digital media and content, especially those that are subject to payment. Current PoD systems are mostly centralized and heavily dependent on a trusted third party (TTP) especially for payment. Such existing PoD systems often lack security, transparency, and visibility, and are not highly credible, as the TTP can be subject to failure, manipulation, corruption, compromise, and hacking. In this paper, we propose a decentralized PoD solution for PoD of digital assets. Our solution leverages key features of blockchain and Ethereum smart contracts to provide immutable and tamper-proof logs, accountability, and traceability. Ethereum smart contracts are used to orchestrate and govern all interactions and transactions including automatic payments in Ether cryptocurrency between customers, digital-content provider, and the file server hosting the digital content. All entities are incentivized to act honestly, and our solution has a mechanism to handle dispute if arisen among participants. The solution has an off-chain secure download phase involving the file server and customers. Moreover, our solution leverages the benefits of interplanetary file system to store the agreed upon terms and conditions between the smart contract actors. A security analysis of our proposed system has been provided. The full code of the smart contract has been publicly made available on Github.
Huijuan Zhang, Chengxin Jin, Hejie Cui
No abstract is available for this record.
Roman Matzutt, Jens Hiller, Martin Henze, Jan Henrik Ziegeldorf · 7 authors
No abstract is available for this record.
Dmitry Efanov, Pavel Roschin
Conceptually, the blockchain is a distributed database containing records of transactions that are shared among participating members. Each transaction is confirmed by the consensus of a majority of the members, making fraudulent transactions unable to pass collective confirmation. Once a record is created and accepted by the blockchain, it can never be altered or disappear. Nowadays the blockchain technology is considered as the most significant invention after the Internet. If the latter connects people to realize on-line business processes, the former could decide the trust problem by peer-to-peer networking and public-key cryptography. The purpose of this paper is to consider on distinct use cases at the all-pervasive impact of the blockchain technology and look at this as an inalienable part of our daily life.
Qi Wang, Xiangxue Li, Yu Yu
Bitcoin is promoted as decentralized cryptocurrency by using pseudonym to achieve anonymity. Unfortunately, numerous seminal works have demonstrated that Bitcoin only offers weak anonymity in practice. Indeed, the practical technologies of clustering and flow analysis are much effective for tracing Bitcoin transaction and thereby revealing the owner involved. Otherwise said, user's privacy in Bitcoin has been sadly degenerated to be linkable. In this paper, we propose a completely decentralized scheme that can provide full anonymity in Bitcoin. The idea behind the output is to exploit a secure escrow address, which is consensual by all the involved users. The escrow address is generated from the trick of cryptographically secure distributed key generation and can then be used for mixing transactions in Bitcoin. Our protocol is secure against malicious adversaries. The users can jointly perform the protocol and successfully accomplish the transaction without the help of any (trusted) third party and no extra fees. Besides, our proposal is completely compatible with the current Bitcoin architecture.
Yu Liu, Haopeng Chen, Fei Hu
For the sake of protecting users' privacy from the malicious data which is shared by other people and leasing the pressure of the clouds, an approach of verification based on the Blockchain is put forward in our article. By using the Blockchain to record the hash value and other necessary information of data sharing by other people, we can guarantee that the data user received from a third-party source (such as a cloud storage platform) is the original uploaded data indeed. After taking some experiments on the following method. We confirm that it can be easily distinguished whether a data has been modified by malicious people through our Blockchain-based approach. This Blockchain-based approach of verification can effectively help users find out if the data received is the one exactly he wants. In addition, our approach will imply that the data is not the original one and that data cannot be opened or executed.
Meenakshi Bhat, Shafalika Vijayal
The blockchain is a perceptive invention - the discovery of a person or group of people. But since its invention, it has evolved into something greater and present opportunities for tempestuous innovation. Blockchain has tried to allure evreryone across different domains like industrial sector, banking, healthcare, land holdings and even the public and private sector. The blockchain is an imperishable digital log of financial transactions that can be scheduled to record not just efficient transactions but practically everything that holds a price. It enables global business transactions with less conflict and more trust. Blockchain has invented an era into technology in which the digital information can be distributed without being imitated. Bitcoin blockchain is the most popular public blockchain network, with around 10K nodes. The other big cryptocurrency blockchain project is Ethereum. Ethereum however wasn't designed to be a form of currency but instead it is intended to enable "smart contracts". Many cryptocurrencies are built on the top of blockchain, with the most popular being Bitcoin. In this paper we are going to present an overview of the blockchain technology with focus on two most widely used cryptocurrencies and their comparative analysis.
He Sun, Hongliang Mao, Xiaomin Bai, Zhidong Chen · 6 authors
Digital Currency for Central Bank is becoming an important policy for country. CBDC (Central Bank Digital Currency) model should take advantages in the supervision, payment and consumption. Blockchain possesses the feature of de-centrality, tamper-resistant, and traceability. So this paper attempts to use the blockchain as the fundamental technology of CBDC. However, the challenges such as the protection for users privacy, supervision and transaction speed should be overcome. This paper proposes a CBDC model called MBDC which is based on the permission blockchain technology. The model makes use of the multi-blockchain architecture and ChainID to improve the models scalability and process payments more quickly. In this model, central bank and commercial banks and other agencies build and maintain the blockchain. On one hand, central bank could master the issuance of currency. On the other hand, relying on the user account address protocol, central bank could separate the users identity and transaction information. In this way, central bank could avoid double-spending issues and protect users privacy. In addition, the establishment of DC (Data Center) and layers of supervision provide strong supervision for the model. Finally, we also demonstrate, both theoretically and experimentally, the performance of model on the scalability and the speed of transaction execution etc.
Yi Liu, Xiayang Chen, Lei Zhang, Chaojing Tang · 5 authors
Bitcoin is a digital cryptocurrency operating on a peer to peer network, which is currently integrated across a number of businesses and exchange markets. New bitcoins is created by participants who contribute computational resources to maintain a public blockchain as miners. Miners collaborate in a mining pool to reduce their variance and earn steadier rewards in Bitcoin. Each mining pool desires to make a profit in the competition against others. To this end, an intelligent mining strategy to enable a mining pool to attain higher probability to get rewards disproportional to its computational power is proposed in this paper. We deploy some forwarding nodes according to the distribution of Bitcoin nodes. This strategy can reduce time delay for messages propagation and increase the probability for new block to be appended on the longest blockchain. It is also easy to deploy in existing network with low expenditure.