Blockchain and Its Applications – A Detailed Survey

Aras, Supriya Thakur; Kulkarni, Vrushali

doi:10.5120/ijca2017915994

Cited by 45 publications

(15 citation statements)

References 15 publications

(24 reference statements)

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“…Transparency in Blockchain networks ensure the availability of the transactions to each node in a distributed network, whereas tamper-resistance makes each recorded transaction to be unmodifiable [9] or removable. Over the years, the technology has been profusely researched and experimented to bring its benefits to other application areas [10]. It is because of the decentralized, immutable and transparent nature of blockchain, that its applications have also been witnessed in non-financial areas like education, internet of things IoT, healthcare, big data, cloud computing, supply chain management, cyber security and so on.…”

Section: Introductionmentioning

confidence: 99%

A Survey on Privacy Vulnerabilities in Permissionless Blockchains

Junejo¹,

Hashmani²,

Alabdulatif³

2020

IJACSA

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Blockchain decentralization not only ensures transparency of transactions to eliminate need of trusting third party, but also makes the transactions of the network to be publicly accessible to all the participating peers in the network. As a result, data anonymity and confidentiality are compromised making several business enterprises and industrialists hesitant to adopt the technology. Although research community has proposed various privacy-preserving solutions for blockchain, however, they still lack in efficiency resulting in distrust of industries in opting for the technology. This study is conducted for contributing to the existing body of knowledge corresponding to privacy in blockchains. The fundamental goal of this study is to delve into privacy vulnerabilities of the blockchain network in a permissionless setting by identifying non-trivial roots of factors causing privacy breach in blockchain and presenting limitation of existing privacy preserving mechanisms. Studies with superficial comparison of privacy preserving techniques are available in literature but a detailed and in-depth analysis of their limitations and causes of privacy breach in blockchain is yet not done. Therefore, in this paper we first present comprehensive analysis of various privacy breaching factors of the blockchain networks. Next, we discuss existing cryptographic and noncryptographic solutions in literature. We found out that these existing privacy preserving mechanisms have their own set of limitations and hence are inefficient at current point of time. The existing privacy preserving mechanisms need further consideration of the research community before they're widely adopted and benchmarked. Therefore, in the end, we identified some future directions that need to be addressed to model an efficient privacy preserving mechanism for wider adoption of the blockchain technology.

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Section: Introductionmentioning

confidence: 99%

A Survey on Privacy Vulnerabilities in Permissionless Blockchains

Junejo¹,

Hashmani²,

Alabdulatif³

2020

IJACSA

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“…The private blockchain is also known as the permissioned blockchain, and is only used in private organizations or institutions [27]. Unlike public blockchains, private blockchains are generally not open to the outside world and are only open to individual individuals or institutions.…”

Section: Private Blockchainmentioning

confidence: 99%

A Survey on Consortium Blockchain Consensus Mechanisms

Yao,

Ye,

Murimi

et al. 2021

Preprint

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Blockchain is a distributed ledger that is decentralized, immutable, and transparent, which maintains a continuously growing list of transaction records ordered into blocks. As the core of blockchain, the consensus algorithm is an agreement to validate the correctness of blockchain transactions. For example, Bitcoin is a public blockchain where each node in Bitcoin uses the Proof of Work (PoW) algorithm to reach a consensus by competing to solve a puzzle. Unlike a public blockchain, a consortium blockchain is an enterprise-level blockchain that does not contend with the issues of creating a resource-saving global consensus protocol. This paper highilights several state-of-the art solutions in consensus algorithms for enterprise blockchain. For example, the Hy-perLedger by Linux Foundation includes implementing Practical Byzantine Fault Tolerance (PBFT) as the consensus algorithm. PBFT can tolerate a range of malicious nodes and reach consensus with quadratic complexity. Another consensus algorithm, HotStuff, implemented by Facebook's Libra project, has achieved linear complexity of the authenticator. This paper presents the operational mechanisms of these and other consensus protocols, and analyzes and compares their advantages and drawbacks.

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“…Rothers et al [25] considered that the system must be robust enough to allow data privacy and integrity which could be managed with a unique identity of devices with little scope of tampering. The system should allow scalability and solve problems of data exchange and trading [40,41,46]. With the help of data fusion techniques, the analysis could be done on the cloud, thereby improving the healthcare delivery and reducing operational expenditures.…”

Section: Decentralizing Iot Network Employing Blockchainmentioning

confidence: 99%

Amalgamation of Blockchain Technology and Internet of Things for Healthcare Applications

Bhatia

Mishra

Mukherjee

2021

Blockchain for 5g-Enabled IoT

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The integration of blockchain and the Internet of Things (IoT) helps to strengthen and leverage mutual advantages in a variety of industrial domains including healthcare. The healthcare industry is one of the largest and fastest-growing industries involving more than 10% of the gross domestic product (GDP) of several countries globally. The use of blockchain in IoT can help to track multiple devices in the network, avoid duplication of malicious data entries, disallow data tampering, and provide enhanced security and privacy. Several devices are connected in an IoT network for fast-paced 5G-enabled data transfer environment for different industrial applications for collecting information and processing it, and the chances of failure of this centralized system are much higher. The time required to retrieve data from different devices, existing protocols, and access control mechanism employed presently may not work in the future as they are centralized based mechanisms [1,2]. The deployment of blockchain in IoT allows distributed, decentralized ledger records with high security, privacy, improved efficiency, and authenticity of data [1,3,4].Soon, the blockchain technology would immensely benefit and revolutionize the healthcare sector by ensuring data transparency, reducing costs of service delivery,

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Blockchain and Its Applications – A Detailed Survey

Cited by 45 publications

References 15 publications

A Survey on Privacy Vulnerabilities in Permissionless Blockchains

A Survey on Privacy Vulnerabilities in Permissionless Blockchains

A Survey on Consortium Blockchain Consensus Mechanisms

Amalgamation of Blockchain Technology and Internet of Things for Healthcare Applications

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