Blockchain Technology and Application: 5th CCF China Blockchain Conference, CBCC 2022, Wuxi, China, December 23–25, 2022, Proceedings ()

Description

This book constitutes the refereed proceedings of the 5th CCF China Blockchain Conference, CBCC 2022, held in Wuxi, China, in December 2022.  The 7 revised full papers presented were carefully reviewed and selected from 67 submissions. The papers deal with research results and development activities in all aspects of blockchain science and technology.   Preface Organization Contents A Proxy Re-encryption Scheme of Medical Data Sharing Based on Consortium Blockchain 1 Introduction 2 Preliminary 2.1 Blockchain Technology 2.2 NTRU Encryption Algorithm 2.3 Identity-Based Proxy Re-encryption Technology 3 Security Sharing of Medical Data 3.1 Scheme System Description 3.2 Identity-Based Hierarchical Re-encryption Process 3.3 Consortium Blockchain Medical Data Sharing Process 4 Security Analysis and Performance Analysis 4.1 Security Analysis 4.2 Performance Analysis 4.3 The Proposed Solution is Compared with the Existing Work 5 Conclusion References A Leadership Transfer Algorithm for the Raft 1 Introduction 2 The Node Failure Time and the LWLR Algorithm 2.1 Raft Overview 2.2 The Node Failure Time 2.3 The LWLR Algorithm 3 The Leadership Transfer Algorithm 3.1 The Network Split Probability Model 3.2 The Leader Selection Algorithm 3.3 The Leadership Transfer Algorithm 4 Simulation and Analysis 4.1 Experimental Environment 4.2 Using the LWLR Algorithm to Predict the Node Failure Time 4.3 The Leadership Transfer Algorithm 5 Conclusion References Blockchain Multi-signature Wallet System Based on QR Code Communication 1 Introduction 2 Related Works 3 System Overview 3.1 Distributed Key Management 3.2 Private Key Share Cold Storage 3.3 Multi-party Signature Process 4 Multi-party Signature Implementation 4.1 Practicability of Multi-signature Scheme 4.2 Signature Algorithm 4.3 Homomorphic Encryption 4.4 Secret Sharing 4.5 Threshold Signature 5 Communication Mechanism of Cold Wallet 5.1 Cold Wallet Design Concept 5.2 Implementation of Cold Wallet Communication 6 Hardware Design of Cold Wallet 7 Hardware Design of Cold Wallet 7.1 Common Attacks on Hardware Wallets 7.2 Anti-interference QR Code Communication 7.3 Defense Against Electromagnetic Side-Channel Attacks 8 Communication Efficiency of Cold Wallet 8.1 Comparison of Coding Efficiency 8.2 Optimization of Communication Process 8.3 Efficiency of Signature Calculation Program 9 Conclusion References EthMB+: A Tamper-Proof Data Query Model Based on B+ Tree and Merkle Tree 1 Introduction 2 Preliminaries 2.1 Ethereum 2.2 Blockchain Organization 3 EthMB+ Description 3.1 MB+ Tree 3.2 Blockchain Data Extraction and Insertion 3.3 Blockchain Data Query 4 Implementation and Evaluation 4.1 Storage Usage 4.2 Insertion Performance 4.3 Query Performance 5 Conclusion References Overview of Zero-Knowledge Proof and Its Applications in Blockchain 1 Introduction 2 First Zero-Knowledge Proofs 2.1 Interactive Zero-Knowledge Proofs 2.2 Non-interactive Zero-Knowledge Proofs 3 Zk-SNARKs Based on CRS 4 Universal Updatable zk-SNARK 5 Transparent zk-SNARK 6 MPC-in-the-Head 7 Applications in Blockchain 7.1 Privacy Protection 7.2 Expansion 7.3 Applications 8 Trends and Outlook 9 Conclusion References PCT: A Relay-Based Privacy-Preserving Cross-Chain Transaction Scheme 1 Introduction 2 Preliminaries 2.1 Cross-Chain Technology 2.2 Pedersen Commitment 2.3 Ring Signature 3 System Architecture and Models 3.1 System Roles 3.2 Transaction Models 4 Privacy-Preserving Cross-Chain Transaction Scheme (PCT) 4.1 Cross-Chain Transaction 4.2 Lending Transaction 5 Security Analysis 5.1 Anonymity 5.2 Confidentiality 5.3 Reliability 6 Experiments 6.1 The Performance of Commitment Range Proof 6.2 The Performance of Transaction Generation and Verification 7 Conclusion References An Illegal Data Supervision Scheme for the Consortium Blockchain 1 Introduction 2 Related Works 3 System Model and Design Goals 3.1 System Model 4 Proposed Illegal Data Supervision Scheme 4.1 Blocking Method Based on Regular Expression 4.2 Lightweight Transaction Mark Blocking Method 5 Analysis and Comparison 5.1 Security Analysis 5.2 Theoretical Analysis 5.3 Experiment Analysis 6 Conclusion References Author Index