A Survey on Privacy Protection of Blockchain: The Technology and Application

Wang, Dan; Zhao, Jindong; Wang, Yingjie

doi:10.1109/access.2020.2994294

Cited by 63 publications

(36 citation statements)

References 51 publications

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“…These blocks can be used to create and verify transactions using hashing and cryptographic algorithms. Zero-knowledge proof (ZKP) is a new technology to add more security to the blockchain technology by using a third party, called the "prover", who can prove and verify the value without getting any information about the transaction, but who only possesses the secret information [46][47][48]. Liu, in 2019, used ZKP and multi-factor authentications to secure the verifier identity, which can also be used in many IoT devices and applications.…”

Section: Discussionmentioning

confidence: 99%

CustodyBlock: A Distributed Chain of Custody Evidence Framework

Alruwaili

2021

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With the increasing number of cybercrimes, the digital forensics team has no choice but to implement more robust and resilient evidence-handling mechanisms. The capturing of digital evidence, which is a tangible and probative piece of information that can be presented in court and used in trial, is very challenging due to its volatility and improper handling procedures. When computer systems get compromised, digital forensics comes into play to analyze, discover, extract, and preserve all relevant evidence. Therefore, it is imperative to maintain efficient evidence management to guarantee the credibility and admissibility of digital evidence in a court of law. A critical component of this process is to utilize an adequate chain of custody (CoC) approach to preserve the evidence in its original state from compromise and/or contamination. In this paper, a practical and secure CustodyBlock (CB) model using private blockchain protocol and smart contracts to support the control, transfer, analysis, and preservation monitoring is proposed. The smart contracts in CB are utilized to enhance the model automation process for better and more secure evidence preservation and handling. A further research direction in terms of implementing blockchain-based evidence management ecosystems, and the implications on other different areas, are discussed.

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Section: Discussionmentioning

confidence: 99%

CustodyBlock: A Distributed Chain of Custody Evidence Framework

Alruwaili

2021

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“…Consortium blockchain, also known as "permissioned chain", is a semi-closed blockchain, which refers to a blockchain that is jointly managed by multiple industry institutions. Only members of the consortium can read, write and send all or part of the data [17]. It fundamentally closes the channels for unauthorized nodes to access data, realizes complete authority control and security guarantee, and significantly reduces the risk of blockchain privacy leakage [18].…”

Section: Consortium Blockchainmentioning

confidence: 99%

Research on Blockchain-Based E-Bidding System

Wang

Zhao

2021

Applied Sciences

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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.

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“…As blockchain's core lies with P2P network, it has benefited from previous extensive work on P2P systems popularly used in file sharing applications to boost the performance and avoid SPoF. Moreover, blockchain technology has improved some aspects of the P2P Network to provide high-efficiency consensus protocols [9][10][11], identity privacy [12,13] and security of transactions [14]. The distributed topology controlling in blockchain's P2P network is one of the aspects studied.…”

Section: Related Work and Backgroundmentioning

confidence: 99%

Efficient topology control of blockchain peer to peer network based on SDN paradigm

Deshpande

Badis

George

2021

Peer-to-Peer Netw. Appl.

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Blockchain allows to securely store, using cryptography functions, validated transactions and other data across its peer to peer (P2P) network. This P2P network is generated and maintained by the participating peers in a distributed manner through peer discovery, neighbor selection and managing inbound/outbound connections. As these tasks require extra consumption of network bandwidth, energy, memory and CPU usage, resource-limited devices may not support inherent blockchain applications. Further, changes in the topology control functions or reconfiguration should be considered by all peers to fully benefit from the new performance, which can take time. The aim of this paper is to build a blockchain network in a manner that greatly reduce topology control overhead while guaranteeing the properties such as high flexibility, fast reconfigurability, connectivity, small diameter and clustering. For this, we propose to use the Software-Defined Networking (SDN) paradigm to manage the blockchain P2P network. This way, the topology control tasks are moved off the peers to a secure overlay layer composed of multiple servers having synchronized databases. This new layer is responsible for building and managing the topological structure of the P2P network layer based on random r-out digraphs. Next, we mathematically discuss r-out digraphs generation using binomial distribution and preferential attachment models. Then, and in order to reduce the number of connections per peer, we establish lower and minimum upper bounds on outbound and inbound connections respectively that still guarantee the P2P network feasibility and connectivity. Further, we investigate topological properties of blockchain P2P network such as connectivity, diameter and clustering. Finally, we provide extensive simulation and numerical results to verify the efficiency of our approach and illustrate the effects of centralized topology control on network performance.

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A Survey on Privacy Protection of Blockchain: The Technology and Application

Cited by 63 publications

References 51 publications

CustodyBlock: A Distributed Chain of Custody Evidence Framework

CustodyBlock: A Distributed Chain of Custody Evidence Framework

Research on Blockchain-Based E-Bidding System

Efficient topology control of blockchain peer to peer network based on SDN paradigm

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