Smart City Infrastructure
Description
The wide range of topics presented in this book have been chosen to provide the reader with a better understanding of smart cities integrated with AI and blockchain and related security issues.
The goal of this book is to provide detailed, in-depth information on the state-of-the-art architecture and infrastructure used to develop smart cities using the Internet of Things (IoT), artificial intelligence (AI), and blockchain security-the key technologies of the fourth industrial revolution. The book outlines the theoretical concepts, experimental studies, and various smart city applications that create value for inhabitants of urban areas. Several issues that have arisen with the advent of smart cities and novel solutions to resolve these issues are presented. The IoT along with the integration of blockchain and AI provides efficient, safe, secure, and transparent ways to solve different types of social, governmental, and demographic issues in the dynamic urban environment. A top-down strategy is adopted to introduce the architecture, infrastructure, features, and security.
Audience
The core audience is researchers in artificial intelligence, information technology, electronic and electrical engineering, systems engineering, industrial engineering as well as government and city planners.
More details
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Additional editions
Persons
Vishal Kumar, PhD is an assistant professor in the Department of Computer Science and Engineering at Bipin Tripathi Kumaon Institute of Technology, Dwarahat (an Autonomous Institute of Govt. of Uttarakhand), India.
Vishal Jain, PhD is an associate professor at the Department of Computer Science and Engineering, School of Engineering and Technology, Sharda University, Greater Noida, UP India. He has more than 450 research citation indices with Google Scholar (h-index score 12 and i-10 index 15).
Bharti Sharma, PhD is an assistant professor and academic head of the MCA department of DIT University, Dehradun, India.
Jyotir Moy Chatterjee is an assistant professor in the Information Technology Department at Lord Buddha Education Foundation (LBEF), Kathmandu, Nepal. He has published more than 60 international research paper publications, three conference papers, three authored books, 10 edited books, 16 book chapters, two Master's theses converted into books, and one patent.
Rakesh Shrestha, PhD is a postdoctoral researcher at the Department of Information and Communication Engineering, Yeungnam University, South Korea.
Content
Preface xvii
Acknowledgment xxi
1 Deep Dive Into Blockchain Technology: Characteristics, Security and Privacy Issues, Challenges, and Future Research Directions 1
Bhanu Chander
1.1 Introduction 2
1.2 Blockchain Preliminaries 3
1.2.1 Functioning of Blockchain 3
1.2.2 Design of Blockchain 4
1.2.3 Blockchain Elements 5
1.3 Key Technologies of Blockchain 7
1.3.1 Distributed Ledger 7
1.3.2 Cryptography 8
1.3.3 Consensus 8
1.3.4 Smart Contracts 9
1.3.5 Benchmarks 9
1.4 Consensus Algorithms of Blockchain 9
1.4.1 Proof of Work (PoW) 10
1.4.2 Proof of Stake (PoS) 10
1.4.3 BFT-Based Consensus Algorithms 11
1.4.4 Practical Byzantine Fault Tolerance (PBFT) 12
1.4.5 Sleepy Consensus 12
1.4.6 Proof of Elapsed Time (PoET) 12
1.4.7 Proof of Authority (PoA) 13
1.4.8 Proof of Reputation (PoR) 13
1.4.9 Deputized Proof of Stake (DPoS) 13
1.4.10 SCP Design 13
1.5 Internet of Things and Blockchain 14
1.5.1 Internet of Things 14
1.5.2 IoT Blockchain 16
1.5.3 Up-to-Date Tendency in IoT Blockchain Progress 16
1.6 Applications of Blockchain in Smart City 18
1.6.1 Digital Identity 18
1.6.2 Security of Private Information 19
1.6.3 Data Storing, Energy Ingesting, Hybrid Development 19
1.6.4 Citizens Plus Government Frame 20
1.6.5 Vehicle-Oriented Blockchain Appliances in Smart Cities 20
1.6.6 Financial Applications 21
1.7 Security and Privacy Properties of Blockchain 21
1.7.1 Security and Privacy Necessities of Online Business Transaction 21
1.7.2 Secrecy of Connections and Data Privacy 23
1.8 Privacy and Security Practices Employed in Blockchain 24
1.8.1 Mixing 24
1.8.2 Anonymous Signatures 25
1.8.3 Homomorphic Encryption (HE) 25
1.8.4 Attribute-Based Encryption (ABE) 26
1.8.5 Secure Multi-Party Computation (MPC) 26
1.8.6 Non-Interactive Zero-Knowledge (NIZK) 26
1.8.7 The Trusted Execution Environment (TEE) 27
1.8.8 Game-Based Smart Contracts (GBSC) 27
1.9 Challenges of Blockchain 27
1.9.1 Scalability 27
1.9.2 Privacy Outflow 28
1.9.3 Selfish Mining 28
1.9.4 Security 28
1.10 Conclusion 29
References 29
2 Toward Smart Cities Based on the Internet of Things 33
Djamel Saba, Youcef Sahli and Abdelkader Hadidi
2.1 Introduction 34
2.2 Smart City Emergence 36
2.2.1 A Term Popularized by Private Foundations 36
2.2.2 Continuation of Ancient Reflections on the City of the Future 37
2.3 Smart and Sustainable City 38
2.4 Smart City Areas (Sub-Areas) 40
2.4.1 Technology and Data 40
2.4.2 Economy 40
2.4.3 Population 43
2.5 IoT 43
2.5.1 A New Dimension for the Internet and Objects 46
2.5.2 Issues Raised by the IoT 48
2.5.2.1 IoT Scale 48
2.5.2.2 IoT Heterogeneity 48
2.5.2.3 Physical World Influence on the IoT 51
2.5.2.4 Security and Privacy 52
2.5.3 Applications of the IoT That Revolutionize Society 52
2.5.3.1 IoT in the Field of Health 53
2.5.3.2 Digital Revolution in Response to Energy Imperatives 53
2.5.3.3 Home Automation (Connected Home) 54
2.5.3.4 Connected Industry 54
2.5.3.5 IoT in Agriculture 55
2.5.3.6 Smart Retail or Trendy Supermarkets 56
2.5.3.7 Smart and Connected Cities 57
2.5.3.8 IoT at the Service of Road Safety 57
2.5.3.9 Security Systems 59
2.5.3.10 Waste Management 60
2.6 Examples of Smart Cities 60
2.6.1 Barcelona, a Model Smart City 60
2.6.2 Vienna, the Smartest City in the World 61
2.7 Smart City Benefits 61
2.7.1 Security 61
2.7.2 Optimized Management of Drinking and Wastewater 62
2.7.3 Better Visibility of Traffic/Infrastructure Issues 64
2.7.4 Transport 64
2.8 Analysis and Discussion 65
2.9 Conclusion and Perspectives 67
References 68
3 Integration of Blockchain and Artificial Intelligence in Smart City Perspectives 77
R. Krishnamoorthy, K. Kamala, I. D. Soubache, Mamidala Vijay Karthik and M. Amina Begum
3.1 Introduction 78
3.2 Concept of Smart Cities, Blockchain Technology, and Artificial Intelligence 82
3.2.1 Concept and Definition of Smart Cities 82
3.2.1.1 Integration of Smart Cities with New Technologies 83
3.2.1.2 Development of Smart Cities by Integrated Technologies 85
3.2.2 Concept of Blockchain Technology 86
3.2.2.1 Features of Blockchain Technology 87
3.2.2.2 Framework and Working of Blockchain Technology 88
3.2.3 Concept and Definition of Artificial Intelligence 89
3.2.3.1 Classification of Artificial Intelligence- Machine Learning 90
3.3 Smart Cities Integrated with Blockchain Technology 91
3.3.1 Applications of Blockchain Technology in Smart City Development 93
3.3.1.1 Secured Data Transmission 93
3.3.1.2 Digital Transaction-Smart Contracts 94
3.3.1.3 Smart Energy Management 94
3.3.1.4 Modeling of Smart Assets 95
3.3.1.5 Smart Health System 96
3.3.1.6 Smart Citizen 96
3.3.1.7 Improved Safety 96
3.4 Smart Cities Integrated with Artificial Intelligence 97
3.4.1 Importance of AI for Developing Smart Cities 98
3.4.2 Applications of Artificial Intelligence in Smart City Development 99
3.4.2.1 Smart Transportation System 100
3.4.2.2 Smart Surveillance and Monitoring System 102
3.4.2.3 Smart Energy Management System 103
3.4.2.4 Smart Disposal and Waste Management System 106
3.5 Conclusion and Future Work 107
References 108
4 Smart City a Change to a New Future World 113
Sonia Singla and Aman Choudhary
4.1 Introduction 113
4.2 Role in Education 115
4.3 Impact of AI on Smart Cities 116
4.3.1 Botler AI 117
4.3.2 Spot 117
4.3.3 Nimb 117
4.3.4 Sawdhaan Application 117
4.3.5 Basic Use Cases of Traffic AI 118
4.4 AI and IoT Support in Agriculture 119
4.5 Smart Meter Reading 120
4.6 Conclusion 123
References 123
5 Registration of Vehicles With Validation and Obvious Manner Through Blockchain: Smart City Approach in Industry 5.0 127
Rohit Rastogi, Bhuvneshwar Prasad Sharma and Muskan Gupta
5.1 Introduction 128
5.1.1 Concept of Smart Cities 128
5.1.2 Problem of Car Registration and Motivation 129
5.1.2.1 Research Objectives 129
5.1.2.2 Scope of the Research Work 129
5.1.3 5G Technology and Its Implications 130
5.1.4 IoT and Its Applications in Transportation 130
5.1.5 Usage of AI and ML in IoT and Blockchain 131
5.2 Related Work 131
5.2.1 Carchain 132
5.2.2 Fabcar IBM Blockchain 132
5.2.3 Blockchain and Future of Automobiles 132
5.2.4 Significance of 5G Technology 134
5.3 Presented Methodology 134
5.4 Software Requirement Specification 135
5.4.1 Product Perspective 135
5.4.1.1 Similarities Between Carchain and Our Application 135
5.4.1.2 Differences Between Carchain and Our Application 135
5.4.2 System Interfaces 136
5.4.3 Interfaces (Hardware and Software and Communication) 136
5.4.3.1 Hardware Interfaces 137
5.4.3.2 Software Interfaces 137
5.4.3.3 Communications Interfaces 138
5.4.4 Operations (Product Functions, User Characteristics) 138
5.4.4.1 Product Functions 138
5.4.4.2 User Characteristics 138
5.4.5 Use Case, Sequence Diagram 139
5.4.5.1 Use Case 139
5.4.5.2 Sequence Diagrams 141
5.4.5.3 System Design 142
5.4.5.4 Architecture Diagrams 143
5.5 Software and Hardware Requirements 150
5.5.1 Software Requirements 150
5.5.2 Hardware Requirements 151
5.6 Implementation Details 151
5.7 Results and Discussions 155
5.8 Novelty and Recommendations 156
5.9 Future Research Directions 157
5.10 Limitations 157
5.11 Conclusions 158
References 159
6 Designing of Fuzzy Controller for Adaptive Chair and Desk System 163
Puneet Kundra, Rashmi Vashisth and Ashwani Kumar Dubey
6.1 Introduction 163
6.2 Time Spent Sitting in Front of Computer Screen 165
6.3 Posture 166
6.3.1 Need for Correct Posture 167
6.3.2 Causes of Sitting in the Wrong Posture 167
6.4 Designing of Ergonomic Seat 167
6.4.1 Considerate Factors of an Ergonomic Chair and Desk System 168
6.5 Fuzzy Control Designing 170
6.5.1 Fuzzy Logic Controller Algorithm 171
6.5.2 Fuzzy Membership Functions 172
6.5.3 Rule Base 174
6.5.4 Why Fuzzy Controller? 176
6.6 Result of Chair and Desk Control 177
6.7 Conclusions and Further Improvements 177
References 181
7 Blockchain Technology Dislocates Traditional Practice Through Cost Cutting in International Commodity Exchange 185
Arya Kumar
7.1 Introduction 185
7.1.1 Maintenance of Documents of Supply Chain in Commodity Trading 187
7.2 Blockchain Technology 191
7.2.1 Smart Contracts 191
7.3 Blockchain Solutions 193
7.3.1 Monte Carlo Simulation in Blockchain Solution - An Illustration 194
7.3.2 Supporting Blockchain Technology in the Food Industry Through Other Applications 199
7.4 Conclusion 200
7.5 Managerial Implication 201
7.6 Future Scope of Study 201
References 202
8 InterPlanetary File System Protocol-Based Blockchain Framework for Routine Data and Security Management in Smart Farming 205
Sreethi Thangam M., Janeera D.A., Sherubha P., Sasirekha S.P., J. Geetha Ramani and Ruth Anita Shirley D.
8.1 Introduction 206
8.1.1 Blockchain Technology for Agriculture 207
8.2 Data Management in Smart Farming 208
8.2.1 Agricultural Information 209
8.2.2 Supply Chain Efficiency 209
8.2.3 Quality Management 210
8.2.4 Nutritional Value 210
8.2.5 Food Safety 211
8.2.6 IoT Automation 211
8.3 Proposed Smart Farming Framework 212
8.3.1 Wireless Sensors 212
8.3.2 Communication Channels 213
8.3.3 IoT and Cloud Computing 214
8.3.4 Blockchain and IPFS Integration 215
8.4 Farmers Support System 217
8.4.1 Sustainable Farming 218
8.5 Results and Discussions 219
8.5.1 Benefits and Challenges 219
8.6 Conclusion 221
8.7 Future Scope 221
References 221
9 A Review on Blockchain Technology 225
Er. Aarti
9.1 Introduction 226
9.1.1 Characteristics of Blockchain Technology 227
9.1.1.1 Decentralization 228
9.1.1.2 Transparency 228
9.1.1.3 Immutability 228
9.2 Related Work 229
9.3 Architecture of Blockchain and Its Components 229
9.4 Blockchain Taxonomy 231
9.4.1 Public Blockchain 231
9.4.2 Consortium Blockchain 231
9.4.3 Private Blockchain 232
9.5 Consensus Algorithms 233
9.5.1 Functions of Blockchain Consensus Mechanisms 233
9.5.2 Some Approaches to Consensus 234
9.5.2.1 Proof of Work (PoW) 234
9.5.2.2 Proof of Stake (PoS) 235
9.5.2.3 Delegated Proof of Stake (DPoS) 236
9.5.2.4 Leased Proof of Stake (LPoS) 237
9.5.2.5 Practical Byzantine Fault Tolerance (PBFT) 237
9.5.2.6 Proof of Burn (PoB) 238
9.5.2.7 Proof of Elapsed Time (PoET) 239
9.6 Challenges in Terms of Technologies 239
9.7 Major Application Areas 240
9.7.1 Finance 240
9.7.2 Education 240
9.7.3 Secured Connection 240
9.7.4 Health 240
9.7.5 Insurance 241
9.7.6 E-Voting 241
9.7.7 Smart Contracts 241
9.7.8 Waste and Sanitation 241
9.8 Conclusion 242
References 242
10 Technological Dimension of a Smart City 247
Laxmi Kumari Pathak, Shalini Mahato and Soni Sweta
10.1 Introduction 247
10.2 Major Advanced Technological Components of ICT in Smart City 249
10.2.1 Internet of Things 249
10.2.2 Big Data 250
10.2.3 Artificial Intelligence 250
10.3 Different Dimensions of Smart Cities 250
10.4 Issues Related to Smart Cities 250
10.5 Conclusion 265
References 266
11 Blockchain-Does It Unleash the Hitched Chains of Contemporary Technologies 269
Abigail Christina Fernandez and Thamarai Selvi Rajukannu
11.1 Introduction 270
11.2 Historic Culmination of Blockchain 271
11.3 The Hustle About Blockchain-Revealed 272
11.3.1 How Does It Work? 273
11.3.2 Consent in Accordance-Consensus Algorithm 273
11.4 The Unique Upfront Statuesque of Blockchain 275
11.4.1 Key Elements of Blockchain 275
11.4.2 Adversaries Manoeuvred by Blockchain 276
11.4.2.1 Double Spending Problem 276
11.4.2.2 Selfish Mining and Eclipse Attacks 276
11.4.2.3 Smart Contracts 277
11.4.3 Breaking the Clutches of Centralized Operations 277
11.5 Blockchain Compeers Complexity 278
11.6 Paradigm Shift to Deciphering Technologies Adjoining Blockchain 279
11.7 Convergence of Blockchain and AI Toward a Sustainable Smart City 280
11.8 Business Manifestations of Blockchain 282
11.9 Constraints to Adapt to the Resilient Blockchain 287
11.10 Conclusion 287
References 288
12 An Overview of Blockchain Technology: Architecture and Consensus Protocols 293
Himanshu Rastogi
12.1 Introduction 294
12.2 Blockchain Architecture 295
12.2.1 Block Structure 296
12.2.2 Hashing and Digital Signature 297
12.3 Consensus Algorithm 298
12.3.1 Compute-Intensive-Based Consensus (CIBC) Protocols 300
12.3.1.1 Pure Proof of Work (PoW) 300
12.3.1.2 Prime Number Proof of Work
(Prime Number PoW) 300
12.3.1.3 Delayed Proof of Work (DPoW) 301
12.3.2 Capability-Based Consensus Protocols 302
12.3.2.1 Proof of Stake (PoS) 302
12.3.2.2 Delegated Proof of Stake (DPoS) 303
12.3.2.3 Proof of Stake Velocity (PoSV) 303
12.3.2.4 Proof of Burn (PoB) 304
12.3.2.5 Proof of Space (PoSpace) 304
12.3.2.6 Proof of History (PoH) 305
12.3.2.7 Proof of Importance (PoI) 305
12.3.2.8 Proof of Believability (PoBelievability) 306
12.3.2.9 Proof of Authority (PoAuthority) 307
12.3.2.10 Proof of Elapsed Time (PoET) 307
12.3.2.11 Proof of Activity (PoA) 308
12.3.3 Voting-Based Consensus Protocols 308
12.3.3.1 Practical Byzantine Fault Tolerance (PBFT) 309
12.3.3.2 Delegated Byzantine Fault Tolerance (DBFT) 310
12.3.3.3 Federated Byzantine Arrangement (FBA) 310
12.3.3.4 Combined Delegated Proof of Stake and Byzantine Fault Tolerance (DPoS+BFT) 311
12.4 Conclusion 312
References 312
13 Applicability of Utilizing Blockchain Technology in Smart Cities Development 317
Auwal Alhassan Musa, Shashivendra Dulawat, Kabeer Tijjani Saleh and Isyaku Auwalu Alhassan
13.1 Introduction 318
13.2 Smart Cities Concept 319
13.3 Definition of Smart Cities 320
13.4 Legal Framework by EU/AIOTI of Smart Cities 321
13.5 The Characteristic of Smart Cities 322
13.5.1 Climate and Environmentally Friendly 322
13.5.2 Livability 322
13.5.3 Sustainability 323
13.5.4 Efficient Resources Management 323
13.5.5 Resilient 323
13.5.6 Dynamism 323
13.5.7 Mobility 323
13.6 Challenges Faced by Smart Cities 324
13.6.1 Security Challenge 324
13.6.2 Generation of Huge Data 324
13.6.3 Concurrent Information Update 325
13.6.4 Energy Consumption Challenge 325
13.7 Blockchain Technology at Glance 325
13.8 Key Drivers to the Implementation of Blockchain Technology for Smart Cities Development 327
13.8.1 Internet of Things (IoT) 328
13.8.2 Architectural Organization of the Internet of Things 328
13.9 Challenges of Utilizing Blockchain in Smart City Development 329
13.9.1 Security and Privacy as a Challenge to Blockchain Technology 330
13.9.2 Lack of Cooperation 331
13.9.3 Lack of Regulatory Clarity and Good Governance 331
13.9.4 Energy Consumption and Environmental Cost 332
13.10 Solution Offered by Blockchain to Smart Cities Challenges 332
13.10.1 Secured Data 333
13.10.2 Smart Contract 333
13.10.3 Easing the Smart Citizen Involvement 333
13.10.4 Ease of Doing Business 333
13.10.5 Development of Sustainable Infrastructure 333
13.10.6 Transparency in Protection and Security 334
13.10.7 Consistency and Auditability of Data Record 334
13.10.8 Effective, Efficient Automation Process 334
13.10.9 Secure Authentication 335
13.10.10 Reliability and Continuity of the Basic Services 335
13.10.11 Crisis and Violence Management 335
13.11 Conclusion 335
References 336
About the Editors 341
Index 343
1
Deep Dive Into Blockchain Technology: Characteristics, Security and Privacy Issues, Challenges, and Future Research Directions
Bhanu Chander
Department of Computer Science and Engineering, Pondicherry University, Pondicherry, India
Abstract
Since the innovation, blockchain technology has exposed ingenious applications in our daily passing life. From the beginning of crypto-currency to the current smart contract, blockchain is practiced in numerous fields like digital forensics, insurance payments, online micro-payments, healthcare records sharing, and supply chain tracking. Through enlarge the blockchain talent to the Internet of Things (IoT), Wireless Sensor Networks (WSNs), and Cyber-Physical Systems (CPS), we can obtain a provable and noticeable record transaction data offline-to-online data verification and optimize existing network performance. The abovementioned works aimed at expanded safety measures, automatic transaction command, decentralized stands, etc. The incorporation of blockchain technology has modernized the traditional trade due to its distributed ledger characteristic. Every record is secure by rules of cryptography which makes it more secure and impregnable. Therefore, blockchain can modify the way we buy and sell, how we intermingle with the government, and prove the legitimacy of everything from property names to natural fresh vegetables.
In recent times, the rapid expansion in urbanization population causes various cost-effective and environmental issues, influencing people's living circumstances and class of life. The thought of a smart city that developed with the rise of IoT brings the ability to solve urban issues. Information and Communication Technology (ICT), IoTs, and WSNs play a vital part in executing smart cities. Blockchain has several good creations like pseudonymity, trust-free, intelligibility, democratic state, computerization, decentralization, and safety measures. These creations of blockchain useful to progress smart city services then endorse the expansion of smart cities. On the other hand, to use blockchain efficiently, it must consider security and privacy portions.
This chapter presents the exceptional safety as well as privacy sides of blockchain. Mainly, we present a detailed explanation of the background work of blockchain and consensus methods. After that, we shifted focus to blockchain integration with smart city development, challenges, and applications. Further, we review common security attacks on blockchain and security improvement solutions and the directions for future research.
Keywords: Blockchain, smart city, security, privacy, Internet of Things
1.1 Introduction
Blockchain has gained tremendous popularity in recent times because of its fundamental properties and peer-to-peer operations. Blockchain theory was the future of well-known researcher Santoshi Nakamotos in 2008 with Bitcoin crypto-currency innovation. More than 2,500 crypto-currencies exist, but the authentic utilization of Bitcoin is still not explored effusively. Various issues like secure document transferring, anti-money laundering, decentralization, and authorized and unauthorized mining actions are near related to Bitcoin [1-5]. The Bitcoin system model nearly takes 5 to 8 minutes for the mining process and validation of the transaction, which plays a crucial role in numerous appliances such as industry, economics, supply chain management, healthcare, and the Internet of Things (IoT). In present situations, digital information streams from one-end to a new dissimilar end via an unauthorized transmission channel. Where securities models and privacy are the two significant worries in any transaction, blockchain produces a protected peer-to-peer broadcast. Moreover, all the transactions of blockchain publicly accessible for analyzing although none can amend the transaction one time it is recorded [1-6].
Blockchain is a scattered data catalog that monitors an emergent directory of transaction reports with systematizing them into a hierarchical series of blocks because of database management. Coming to safety potential, blockchain builds and maintains with peer-to-peer overlie setup and secured with intellectual, decentralized exploitation of cryptography techniques. Experts forecasted that blockchain-related annual revenue would reach approximately 22 billion dollars at the end of 2030, with an annual growth rate of 29.6%. Numerous distinguished organizations like Accenture, Cisco, Morgan Stanley, Google, Citibank, Ali baba, IBM and IT vendors, financial consultancies, and internet giants designed and developed a high-standard research laboratory to make a capital layout blockchain knowledge [3-6]. Moreover, blockchain with Artificial Intelligence (AI), Machine Learning (ML), and big data are considered the heart of computing skills for the upcoming generation financial inducts. A few governments have released methodological reports along with white papers on blockchain utilization for a positive approach. Some of them like the European Central Bank unconfined credentials on distributed ledger expertise, and the UK government liberated a fresh testimony that illustrates the outlook of distributed ledger technology. The Chinese administration liberated white papers on the blockchain tools besides improvement in China; the USA builds an authorized and authoritarian background for blockchain knowledge development. In academe, several documents are available on blockchain in the earlier period, consist of a dozen of the article, and provide information on safety then secrecy risks of blockchain. Furthermore, most of the safety then secrecy risk-based articles of blockchain-focused on uncovering attacks that suffer blockchain, and some target specific proposals for employing some current countermeasure adjacent to a subset of various attacks. Among these, very few attempts describe a complete investigation of the safety then confidentiality characteristics of blockchain along with different protocol implementation methods [2-8].
1.2 Blockchain Preliminaries
1.2.1 Functioning of Blockchain
Blockchain is a collection of heterogeneous distributed networks. It considers as a unique technology of this century among other famous innovations because of its elements like crypto techniques, consensus algorithms, and public ledger; working procedure of blockchain consists of various styles, among those we mentioned some of them: customer, client, or node who desire to make a transaction will record and broadcasts the data to the appropriate setup, next to the receiver or the node who interest to receive the data validate the genuineness of data received, and after validation stores data in a block inside the network, every node or the customer in the network authorize the transaction through implementing the PoW or else PoS algorithms which need the validation, and finally, the network that utilized the consensus models will be stored into the block and connected to the blockchain list. Then, every single node in the setup acknowledges the relevant block and then enlarges the chain position on block.
1.2.2 Design of Blockchain
The expansion of the blockchain system will make tremendous changes and impact approximately every industrial, educational, and scientific field in the coming days. In particular, financial transactions are progressing in inventive ways, making it exceptionally important for one and all to understand the blockchain mechanism's architecture and working style. Blockchain blocks are continuously enhance, secure with crypto techniques [6-10]. Here, each block holds a crypto-based hash value of the preceding block, a timestamp, along with transaction info.
In the design of blockchain, information or records are professional along with a related listing of transaction blocks well-maintained in a balanced catalog in the pattern of smooth files. Each block, linked with the preceding block, the initial block entitled the source block. The blockchain database visualized as a good stack, blocks mounded on the peak of one another, finished as the initial block as the stack's base. Every block of blockchain authorized with cryptography has a function by implementing the SHA-256 algorithm and stored in the block's header. One parent block can hold multiple children block; every child block encloses some parent hash value. The characteristics of child blocks purely depend on the parent block's identity and properties. This procedure prolongs until getting each grandchild blocks [6-12]. The cascade consequences confirm that, just once a block has several productions, it cannot interfere with all the successive blocks' forceful recalculations. For more understanding, we mentioned some ingredients with more explanations [4-16].
- i. Data: In blockchain, data stored in the database mostly depend on the respective services and applications, like recording the transmission particulars and banking with IoT. They were storing if data performed peer-to-peer, cloud formation, etc.
- ii. Hash: In the hash function, we can give any length message as input, but it produces unique predetermined length output. If any assailant made changes in the message, then the output comes out entirely differently. For example, if anyone client makes an effort to modify the info kept in a block, then afterward, the block shows an entirely different hash value. To avoid this kind of situation, there must be an assurance that minors of the network must have the knowledge prepared by revising the ledger replicate of...
