Privacy Protection Issues in Blockchain Technology (original) (raw)
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Security and Privacy Issues of Blockchain Technology
Studies in Big Data, 2019
Block-chain is getting popular and it is one of the most common topics that can be considered. it has also changed the lifestyles of many people in certain fields, because of the impact on businesses and combines. Blockchain ensures more reliable and appropriate resources and it is very crucial to keep in mind that the security and privacy have some obstacles as any technology in this fields. The spectrum of blockchain applications is very extended into different areas in banking, health, automotive, the Internet of Things (IoT) etc. Many studies concentrate on using the block-chain data model in different implementations. In this paper we try to describe block-chain technology by discussing its model of a data protection and privacy perspective with different consensus algorithms, as well as issues and opportunities in blockchains.
Communications in Computer and Information Science, 2020
Due to the offering of many benefits, blockchain is a useful environment to build many applications in multiple fields such as cryptocurrency, Internet of Things (IoT), mobile applications and healthcare industry. However, it has a problem in ensuring the privacy of user data due to its public nature. Data on a blockchain is public and can reveal someone's personal data or transactions. Many applications that venture in blockchain such as financial applications, Internet of Things (IoT) and healthcare applications can fall victim to revelation of personal data and linking attack. Many solutions such as automated access-control protocol that does not require a third party, a local miner operating in a local private blockchain that enforces users' access control policy, a cryptographic protocol that lets contractual parties interact by using zero-knowledge proof, and computation of data query in a distributed way by using secure multi-party computation have been proposed to tackle this privacy issue in using blockchain. Hence, this paper provides a review on the current solutions that addresses the privacy issues of blockchain in different platforms. However, these solutions have some limitations that cannot be overlooked and proper measures must be taken to make blockchain to be able to better protect the privacy of its users. This paper also discusses the limitations of the solutions and looks into the aspects that need to be addressed.
An Analysis of Blockchain Technology A Security and Privacy Perspective
An Analysis of Blockchain Technology A Security and Privacy Perspective, 2022
A distributed ledger technology that took over the world in recent days is Blockchain technology. It is simply a list that grows continuously holding the records of the transactions and data records securely in the form of blocks. It is also referred to as technology similar to linked lists where blocks are interlinked to each other [20]. A header block and the body block are the two main components of each block in the blockchain [41]. Usually, the header block holds the information about the management information of the block and the chain. The nodes of the blockchain communicate directly with each other through a peer-to-peer network. Every node consists of its digital signature [30] to validate the transactions. Blockchain technology brings the features like transparency, decentralisation, anonymity, and audibility. These features have gained the interest of both researchers and industries. Nowadays blockchains are extensively used in the fields of finance, medicine, agriculture, transportation, and Internet of Things [25] [38]. But we need to consider the security and privacy-related challenges in order to effectively use this new technology. Today most of the researches are going on the security and the privacy issues of the blockchain. The researches mainly focus on two concepts, analyzing the attacks which have been suffered by the blockchain recently and proposing some of the countermeasures against the type of attack. However, there are very little researches that provide an in-depth analysis of these issues The focus of this chapter is on examining current trends in blockchain security and privacy problems. The chapter is laid out in a fairly orderly fashion. The first portion of the chapter covers the fundamentals of blockchain technology, including the various types of blockchains, blockchain architecture, and consensus methods. The most recent and likely cyberattacks and issues on blockchains are described in the next section. The solutions section lists some of the legitimate current countermeasures to the attacks presented. Finally, the article highlights the unresolved concerns that will need to be handled effectively in the future.
Blockchain Technology : A Tool to Secure Data
International Journal of Scientific Research in Computer Science, Engineering and Information Technology, 2021
Data security is the key to the development of modern Internet technology. The distributed, decentralized, and secured hashed mechanism of the blockchain gives a complete new point of view for the evolution of data security technology. Block chain technology is one of the major technological innovations of this century. In the last couple of years, the interest around blockchain technologies is increasing. Many implementation of blockchain technology are widely available today. Blockchain,the foundation of Bitcoin, has gain much attention in this era. Blockchain is an encrypted, immutable, distributed ledger, which allows transactions take place in a decentralized manner. Blockchain based applications expected to alter numerous fields including financial services, health care, entertainment media, Internet of Things (IoT), and many more. The Blockchain technology plays important role in the process of data security. In this paper, we will discuss about the research being done on this new domain of Computer Science. It is not only the most popular topic to discuss about, but is the most technological innovation, that is all set to reform the entire world.
The Most Secured Technology: Blockchain and Its application in Various Sectors
International Journal of Computer Trends and Technology, 2019
Blockchain is the most amazing technology for upcoming inflictions in computing. It is a decentralized, digitized, creative and innovative invention of the present world by an individual or a group work under the pseudonym, Satoshi Nakamoto in 2008. Distributed ledger of records is immutable and verifiable in Blockchain that's why it is impossible to manipulate any data in existing blocks. Although the most common assumption of blockchain is cryptocurrency, there are explorations in different other sectors. This paper analysis the scope of reviewing the blockchain technology which will introduce the latest research field of its applications. However, it will also highlight the opportunities as well as the challenges in front of the recent technology which is developing our digital world.
Decentralized secure money using blockchain
International Journal of Advance Research Ideas and Innovations in Technology
The blockchain is a decentralized transaction and managing the data. This technology introduced on the first for Bitcoin cryptocurrency which makes easier for the transaction. Blockchain technology has highly raised up in 2008. The main purpose of the Blockchain technology is to provide security, anonymity and data integrity without any third party organization in control of the transactions. This helps on improving in research areas especially from the perspective of technical challenges and limitations. In this research, we have conducted survive mapping study with the goal of presenting the Blockchain technology. The main objective of the researchers is to make the challenges in understanding the current research areas. This the future way to developing more and more on Blockchain technology. A blockchain is just a chain and list of blocks which secures the transfer of funds, by using a digital signature algorithm to prove ownership. Each block in the blockchain will have its own digital signature. We create a web page that contains the login and registration page. We create a key pair of each user that contains the private key and public key. Every time we check this blockchain is valid or not. The main reason for the paper is to research and focus on revealing and improving limitations of Blockchain from privacy and security perspectives. On the basis of this studying the blockchain we highly recommend the researchers to develop in the future.
Algorithms And Security Concern In Blockchain Technology: A Brief Review
SSRN Electronic Journal, 2018
The Blockchain is an ingenious and remarkable invention. This technology created the backbone of a new type of internet. It was originally designed for the digital currency, Bitcoin, in which you can send digital money to anyone, even a stranger. Originally, it transmits bitcoin. It is considered a revolutionary technology. Blockchain helps in creating the record whose authenticity can be verified by the entire community. To make centralized and distributed systems it stores the data over a network of computers, which anyone can use this system, no central organization or person owns a system. It contains a number of blocks that contain data. The database of Blockchain is not stored at a single location, it is an open-source database which can be accessed by anyone and it is easily verifiable. No one owns the blockchain technology. As the blockchain’s nature is distributed, there must be a simple way by which all the nodes reach an agreement; Consensus agreement is a way by which all the participants agree on the contents of the blockchain. Here we will tell you about the basic principles and characteristics of the Consensus Algorithms so that you can decide which of the algorithm the best one to work with is. In this paper, we will research on the number of technical aspects of Blockchain technology, the pace in which this technology is booming and most importantly its implementation on the Bitcoin cryptocurrency which has totally revolutionized the financial infrastructure of the World. Along with this, we will also consider a number of security concerns, challenges and other technical vulnerabilities associated with the Bitcoin technology. The decentralized mechanism, distributed mechanism, scripted mechanism and the mechanism of the password related to Blockchain has opened a new view on the rapidly developing internet technology. There is no need for participants or any third party who are needed to be known to each other. The responsibility is included in the recording, transmission and the activities regarding transferring the storage by distributed technology. That is how the assurance is guaranteed by keeping these aloof from tampering and forged. With the assistance of asymmetric cryptographic algorithm, each and every participant can reach towards consensus on the information of the blockchain. The blockchain technology has the potential to play a key role in the case for information security technology. Hence, in this paper we will also cover the impact of the blockchain will ensure the expansion in the sphere of information security
Blockchain Technology: A Review on Architecture, Security Issues and Challenges
International Journal of Engineering Applied Sciences and Technology
Data is one of the most significant resources. In this digital era, cyber security has become the worldwide issue. Since cyber criminals are getting progressively skilful in their attempts to destroy the valuable data, securing this data has become mandatory. Different procedures have been developed in the past to secure the data, but there are no bounds to security threats, resulting in theft of information from the devices. Currently Blockchain technology is the best tool to secure the data. Blockchain, originally known as Bitcoin, has become very popular technology to digitally create and manage transactions. It is a form of distributed public ledger which analyses and verifies transactions in decentralized manner and data is not under the control of any third party organization. This rapidly evolving technology can possibly change the opinion about digital transactions in various areas such as energy supply, peer-to-peer global payments, financial transactions, agriculture and industry. Regardless, this rising innovation is still in its beginning period of progression. Inspite of several opportunities offered by blockchain, it has limitations such as transaction cost, scalability, consistency security and administration issues which has not yet been addressed and investigated. In spite of the fact that there are a couple of studies on the security and privacy issues of the blockchain, they do not have an efficient assessment of the securing blockchain architectures. This paper presents a detailed architecture of blockchain technology along with systematic study of the security attacks rising in blockchain technology.
A survey paper on blockchain and its implementation to reduce security risks in various domains
Lahore Garrison University research journal of computer science and information technology, 2022
Every technology with its powerful uses has issues connected to it, and security is at the top. As for the changing environment, the world has been shifting to Virtual Reality; the new coming world seems to be the internet and blockchain technology which is more powerful than others and has its applications in every field, be it quantum computing, internet of things, security or others. This survey paper covers blockchain and its security in different sciences and technology fields. We begin with the introduction of blockchain and then discuss its structure. After that, security issues have been highlighted, including attacks and their behavior in quantum computing, internet of things, and cloud computing. Furthermore, we have discussed the most common types of attacks and the SRM model of blockchain, followed by the conclusion.
BLOCKCHAIN CRYPTOGRAPHY AND SECURITY ISSUES
International Journal of Computer Science and Engineering Survey (IJCSES), 2022
Transaction records and other user information are stored in blocks that form a distributed ledger called blockchain. For blockchain to gain widespread adoption, it is crucial that user and transaction data be kept safe. This technology provides cryptographically safe and anonymous financial transactions among the user nodes of the network allowing the transactions to be evaluated and authorized by all the users in a transparent environment. In this paper, we provide a comprehensive overview and classification scheme for all cryptographic ideas currently used in blockchain. Moreover, the current security issues of blockchain are shown, and a future research objective is predicted.