Preface xix
1 Introduction to Classical Cryptography 1
Vani Rajasekar, Premalatha J., Rajesh Kumar Dhanaraj and Oana Geman
1.1 Introduction 2
1.2 Substitution Ciphers 2
1.3 Transposition Cipher 8
1.4 Symmetric Encryption Technique 10
1.5 Asymmetric Encryption Technique 17
1.6 Digital Signatures 22
References 28
2 Quantum Cryptographic Techniques 31
Malathy S., Santhiya M. and Rajesh Kumar Dhanaraj
2.1 Post-Quantum Cryptography 32
2.2 Strength of Quantum Cryptography 32
2.3 Working Principle of Quantum Cryptography 32
2.4 Example of Quantum Cryptography 33
2.5 Fundamentals of Quantum Cryptography 34
2.6 Problems With the One-Time Pad and Key Distribution 35
2.7 Quantum No-Cloning Property 36
2.8 Heisenberg Uncertainty Principle 37
2.9 Quantum Key Distribution 38
2.10 Cybersecurity Risks Prevailing in Current Cryptographic Techniques 39
2.11 Implementation of Quantum-Safe Cryptography 40
2.12 Practical Usage of Existing QKD Solutions 41
2.13 Attributes of Quantum Key Distribution 41
2.14 Quantum Key Distribution Protocols 44
2.15 Applications of Quantum Cryptography 49
2.16 Conclusion 52
References 52
3 Evolution of Quantum Blockchain 55
Dinesh Komarasamy and Jenita Hermina J.
3.1 Introduction of Blockchain 55
3.2 Introduction of Quantum Computing 62
3.3 Restrictions of Blockchain Quantum 65
3.4 Post-Quantum Cryptography Features 72
3.5 Quantum Cryptography 73
3.6 Comparison Between Traditional and Quantum-Resistant Cryptosystems 76
3.7 Quantum Blockchain Applications 77
3.8 Blockchain Applications 77
3.9 Limitations of Blockchain 78
3.10 Conclusion 79
References 79
4 Development of the Quantum Bitcoin (BTC) 83
Gaurav Dhuriya, Aradhna Saini and Prashant Johari
4.1 Introduction of BTC 84
4.2 Extract 87
4.3 Preservation 89
4.4 The Growth of BTC 97
4.5 Quantum Computing (History and Future) 98
4.6 Quantum Computation 99
4.7 The Proposal of Quantum Calculation 101
4.8 What Are Quantum Computers and How They Exertion? 102
4.9 Post-Quantum Cryptography 104
4.10 Difficulties Facing BTC 105
4.11 Conclusion 106
References 107
5 A Conceptual Model for Quantum Blockchain 109
Vijayalakshmi P., Abraham Dinakaran and Korhan Cengiz
5.1 Introduction 110
5.2 Distributed Ledger Technology 110
5.3 Hardware Composition of the Quantum Computer 115
5.4 Framework Styles of Quantum Blockchain 115
5.5 Fundamental Integrants 122
5.6 Conclusion 124
References 124
6 Challenges and Research Perspective of Postâ"Quantum Blockchain 127
Venu K. and Krishnakumar B.
6.1 Introduction 128
6.2 Postâ"Quantum Blockchain Cryptosystems 136
6.3 Postâ"Quantum Blockchain Performance Comparison 154
6.4 Future Scopes of Postâ"Quantum Blockchain 168
6.5 Conclusion 170
References 170
7 Post-Quantum Cryptosystems for Blockchain 173
K. Tamil Selvi and R. Thamilselvan
7.1 Introduction 174
7.2 Basics of Blockchain 174
7.3 Quantum and Post-Quantum Cryptography 177
7.4 Post-Quantum Cryptosystems for Blockchain 180
7.5 Other Cryptosystems for Post-Quantum Blockchain 195
7.6 Conclusion 196
References 199
8 Post-Quantum Confidential Transaction Protocols 201
R. Manjula Devi, P. Keerthika, P. Suresh, R. Venkatesan, M. Sangeetha, C. Sagana and K. Devendran
8.1 Introduction 201
8.2 Confidential Transactions 202
8.3 Zero-Knowledge Protocol 203
8.4 Zero-Knowledge Protocols 212
8.5 Transformation Methods 216
8.6 Conclusion 217
References 218
9 A Study on Post-Quantum Blockchain: The Next Innovation for Smarter and Safer Cities 221
G.K. Kamalam and R.S. Shudapreyaa
9.1 Blockchain: The Next Big Thing in Smart City Technology 222
9.2 Application of Blockchain Technology in Smart Cities 226
9.3 Using Blockchain to Secure Smart Cities 228
9.4 Blockchain Public Key Security 231
9.5 Quantum Threats on Blockchain Enabled Smart City 233
9.6 Post-Quantum Blockchainâ"Based Smart City Solutions 235
9.7 Quantum Computing Fast Evolution 236
9.8 Conclusion 238
References 239
10 Quantum Protocols for Hash-Based Blockchain 241
Sathya K., Premalatha J., Balamurugan Balusamy and Sarumathi Murali
10.1 Introduction 242
10.2 Consensus Protocols 242
10.3 Quantum Blockchain 246
10.4 Quantum Honest-Success Byzantine Agreement (QHBA) Protocol 255
10.5 MatRiCT Protocol 258
10.6 Conclusion 261
References 261
11 Post-Quantum Blockchainâ"Enabled Services in Scalable Smart Cities 263
Kumar Prateek and Soumyadev Maity
11.1 Introduction 264
11.2 Preliminaries 267
11.3 Related Work 273
11.4 Background of Proposed Work 274
11.5 Proposed Work 278
11.6 Conclusion 287
References 288
12 Security Threats and Privacy Challenges in the Quantum Blockchain: A Contemporary Survey 293
K. Sentamilselvan, Suresh P., Kamalam G. K., Muthukrishnan H., Logeswaran K. and Keerthika P.
12.1 Introduction 294
12.2 Types of Blockchain 297
12.3 Quantum Blockchain: State of the Art 298
12.4 Voting Protocol 303
12.5 Security and Privacy Issues in Quantum Blockchain 306
12.6 Challenges and Research Perspective in Quantum Blockchain 308
12.7 Security Threats in Quantum Blockchain 310
12.8 Applications of Quantum Blockchain 311
12.9 Characteristics of Post-Quantum Blockchain Schemes 313
12.10 Conclusion 314
References 314
13 Exploration of Quantum Blockchain Techniques Towards Sustainable Future Cybersecurity 317
H. Muthukrishnan, P. Suresh, K. Logeswaran and K. Sentamilselvan
13.1 Introduction to Blockchain 318
13.2 Insights on Quantum Computing 322
13.3 Quantum Computing Algorithms 332
13.4 Quantum Secured Blockchain 333
13.5 Conclusion 339
References 339
14 Estimation of Bitcoin Price Trends Using Supervised Learning Approaches 341
Prasannavenkatesan Theerthagiri
14.1 Introduction 341
14.2 Related Work 343
14.3 Methodology 344
14.4 Implementation of the Proposed Work 349
14.5 Results Evaluation and Discussion 352
14.6 Conclusion 353
References 353
Index 357
