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Evolution of Blockchain Technologies and its Fundamental Characteristics

Aradhna Saini1*, R. Gopal2, S. Suganthi3 and T. Poongodi4

1Department of Computer Science and Engineering, Noida Institute of Engineering and Technology, Greater Noida, Uttar Pradesh, India

2Information and Communication Engineering, College of Engineering, University of Buraimi, Al Buraimi, Oman

3Department of Computer Science, Cauvery College for Women, Tiruchirapalli, Tamilnadu, India

4School of Computing Science and Engineering Galgotias University, Greater Noida, Delhi-NCR, India

Abstract

Blockchain technology facilitates a way to organize business activities, commercial transactions, minimizes costs and time incurred because of intermediaries, and increases trust of the complete ecosystem. Blockchain is a decentralized transaction technology that was first developed for the cryptocurrency known as bitcoin. Since the concept was first proposed in 2008, there has been a growing interest in blockchain technology. The primary traits of blockchain are as follows: provide security, data integrity and anonymity without the involvement of any third-party organization for tracking the transactions, which drives interest in this technology and opens up new research areas, particularly in solving several technical challenges. A systematic review is conducted to present all relevant fundamental concepts on blockchain technology in this study. Our goal is to gain a technical understanding of current research issues, challenges, and future directions in blockchain technology. The focus of this research work is in providing a high-level overview of blockchain from the context of its categories and various use cases. Researchers interested in this area would gain a better understanding of this technology with this article.

Keywords: Blockchain, bitcoin, cryptographic, private, public, consortium

1.1 An Overview of Blockchain Technology

Blockchain in the early stage is known by cryptocurrency, which is known as bitcoin. It is peer-to-peer network and everyone can use without their authentication details. The public can be a part of blockchain and also carryout transactions. According to Gartner report, the estimation of blockchain till 2030 is $3.1 trillion investment. Blockchain plays a very vital and important role in digital cryptocurrency bitcoin [1]. Blockchain can be defined as a scatter database include information or a set of sheets that spot each and every event and agreement, implement and split into examine parties. The transaction data between sender and receiver can never be removed, and each and every transaction had checkable documentation. Blockchain emulates an assigned database by including information by assimilate information identical across the web in real time. At present has become a slang in both industry and academic community [3]. As one of the most victorious cryptocurrencies, bitcoin has appreciated with its capital retail reaching 1 tn dollars in February 2021. In the beginning, scalability is a colossal have to do cover. The size of bitcoin block is restricted to 1MB, at the moment spam a block is mined regarding about every 10 minutes.

There are some properties of blockchain:

1. i. It has authenticated data, if data change or improve, it has to be confirmed by users using a cryptographic approach.
2. ii. It has a database that is secured by cryptographic symmetric and asymmetric public/private key.
3. iii. The transaction of bitcoin between two devices/parties is very trustworthiness.

Blockchain is conceivable consider as a general ledger, and all carry-out transactions are stocked in a record of blocks. These bonds expend as latest blocks are attached to it continuously. Asymmetric cryptography and allocated consensus algorithms have been executed for customer safety along with register stability. The blockchain technology normally has pointer attribute of decentralized, persistency, anonymity, and audibility. Using these properties, blockchain save cost, improve ability, and increase security.

1.1.1 Evolution of Blockchain Technology

Blockchain has progressed into an additional established technology, and the merchandise for the technology is stretching very fast. The blockchain contributes fetters market awaiting to enlarge at a CAGR of 81.7% atop predict interval 2021 to 2026. Blockchain technology is most intelligible independent, and consortiums from incompatible pasture are applied on different applications of blockchain that expand far away from the origin of cryptocurrency and other different intelligent models. In the uncondensed shareholder, banking plays the earliest major industry investor in the blockchain. Simultaneously, blockchain flatters as undetectable in the online pursuit, and it is very significant to resolve the cybersecurity problem or prevent from methods of attack.

1.1.2 Significant Characteristics of Blockchain Technology

A blockchain is registered effectively in all production in which benefits are supervised and undertaking takes place. It is very powerful in the main aspect of security, it is imparts immovable fetters of tutelage for both, first is digital and second is physical benefits through its protection characteristics that provide between transaction between two different compatible devices. In Figure 1.1 it is very clear to understand the characteristics of blockchain. There are important characteristics described below as coincidental, security, consensus, and other as decentralized. These details of blockchain are very helpful in the research of following transaction. Transaction is the interchange of recommendation that helps to control under the whole amenities rules. These rules help to up and run, with the help of scripting language as bitcoin and also used for state-of-the-art performance. The behavior of blockchain is very credulous, and it is also delineated to get rid of the requirement for all or one setup to gate transactions. Blockchain can be confidential like public, private, or hybrid modification, turn on their appeal public. In the public blockchain, there are no possessors, and anyone can easily access without any authorization, and they are overflowing broadcast. An example of public blockchain is bitcoin. In private blockchain, there are uses of concession to authorize to read and write to the blockchain. Consensus algorithm and mining are not required as sole operation has possession and power block formation. In hybrid blockchain, it works as public but only for a privileged category, and it is controlled by consensus, privileged dependent using a group of rules concurred by all functions. The different characteristics of blockchain is shown in Figure 1.1.

• Faster settlement: The head ascendancy of blockchain technology is that it can pace up settlement, twain by acquiring purge of a shattered gestation framework and by instrumenting a more settlement rotation. It decides to clasp time transaction between parties (sender/receiver). It helps to settle the payment broadcast to Peer-2-Peer (P2P) network consisting of devices that are known by nodes. The payment between these parties, cryptocurrency involved, consists of all records of transactions or also other information.

  Figure 1.1 Different characteristics of blockchain.

• Distributed ledgers: It is represents the database that is a two-way split and harmonized covering different sites and foundations. This technology is the one important key of technologies, and it is responsible for conducting the cryptographic. Block represents the records, each block keeps the encipher hash of the last block and checksum onward the transaction data.
• Consensus: As it is known, the blockchain works on block, and using blocks create a blockchain, the consensus use for surety that every block is added in blockchain [9]. It is the only version that decides which block is added or rejected.
• Enhanced Security: Blockchain automation has superior security, it is almost impossible to shut down the system. In history, bitcoin is the second decentralized and had never been hacked, and the single reason is that blockchain trellis is highly secured by a number of computers, which is known by nodes, and nodes are used to affirm the transaction of bitcoin on this network.
• Decentralized: This technology plays a vital role in the administration of resources, for both hardware and also for software [7]. Blockchain is worn in a decentralized procedure where a single person nor groups has control, preferably everyone in concert keep jurisdiction.
• Immutability: Generating immutably is the foremost values of the blockchain. Blockchain like bitcoin keeps its register in a never-finished state of redirecting momentum. The database is not hacked because of a third party, a third party keeps the data more secure. To command the bitcoin, first, it needs to command over 51% of the whole market.

1.2 Blockchain Architecture and Its Components

A structure of blockchain is an order of blocks, blocks work as a store in an out-and-out list of transaction information like conventional public ledger [5]. Figure 1.2 refers the architecture of blockchain (a) that represents the connection between parties, whole system, and BitCoin connected with each...