This three-volume set, CCIS 2637-2639, constitutes the refereed proceedings of the 7th International Conference on Blockchain, Artificial Intelligence, and Trustworthy Systems, BlockSys 2025, held in Zhuhai, China, during May 3031, 2025.

The 110 full papers included in this book were carefully reviewed and selected from 254 submissions. They were organized in topical sections as follows:
Part I: Blockchain Security & Attack Mitigation; Identity Authentication & Data Privacy; Blockchain Applications & Industry Solutions.
Part II: Deep Learning Architectures & Optimization; Computer Vision & Medical Image Analysis; Natural Language Processing & Multimodal Learning; Reinforcement Learning & Edge Computing Systems.
part III: Blockchain & Smart Contract Trustworthiness; Federated Learning & Edge Computing ; Industrial & IoT System Reliability.

Inhalt

.- Blockchain Security & Attack Mitigation
.- BM-PAW: A Profitable Mining Attack in the PoW-based Blockchain System.
.- Smart Contract Vulnerability Detection Method Based on Vulnerability Propagation Path.
.- Correlation-Sampling Based Graph Learning Method for Blockchain Abnormal Account Detection.
.- Detection and Analysis of Bitcoin Mixing Transactions.
.- Unveiling Latent Information in Transaction Hashes: Hypergraph Learning for Ethereum Ponzi Scheme Detection.
.- Defensive Strategies Against Sandwich Attacks:A Review.
.- Systemic Risk Assessment in CEXs and DEXs: An Application of a Tail Dependence-Based MST and CoVaR Approach.
**.- Consensus Mechanisms & Performance Optimization
** .- Broker2Balance: Profit Maximization and Equitable Distribution for Sharded Blockchains.
.- An Efficient Encoding Storage Framework for Blockchain.
.- DR-DPoS: A Fair Delegated Proof-of-Stake Consensus Algorithm Based on Dynamic Reputation Authorization.
.- UB-MCSVD: Smart Grid Multi-cloud Storage and Verifiable Deletion Scheme Based on ULS-PBFT Consensus.
.- Blockchain Beyond Limits: New Frontiers in Oracles, Scalability and Consensus.
.- Definition and Analysis of Defects in Cross-chain Bridge Decentralized Applications.
.- Optimizing Blockchain ETL Algorithms: Improvement Strategies Based on RPC Interfaces.
.- Few-Shot Decentralized Application Identification via Encrypted Traffic Analysis Using Graph Contrastive Learning.
**.- Identity Authentication & Data Privacy
** .- A Blockchain-Based Terminal-UAV-Cloud Collaborative Identity Authentication Scheme.
.- BCAAH: A Blockchain-Based Cross-Domain Anonymous Authentication Scheme for Heterogeneous Domains.
.- VeryFL: A Verify Federated Learning Framework Embedded with Blockchain.
.- Enabling Public Verifiable Keyword Search over Encrypted Cloud Data Using Consortium Blockchain.
.- A Secure Electronic Notary Scheme Based on InterPlanetary File System and Blockchain.
.- Multi Keyword Dynamic Searchable Encryption Scheme Based on Blockchain.
.- A Distributed Identity Authentication Scheme for The Metaverse.
.- Homomorphic Encryption-Driven Low-Loss P2P Energy Privacy-Preserving Auction.
**.- Blockchain Applications & Industry Solutions
** .- TDTS:A Trusted Data Trading System Framework Based on Blockchain Data Identification and Private Information Retrieval.
.- Blockchain-based Cybersecurity Threat Intelligence Sharing Platform by Integrating Incentive Mechanisms.
.- Research on a Trusted Blockchain Electronic Evidence System for Agricultural Products.
.- Decentralized Multichain Blockchain System for Logistics Management.
.- A More Secure Blockchain-Based Crowdfunding Platform.
.- Innovative Pathways for Blockchain-Enabled Intellectual Property Pledge Financing: A Case Study of the "Zhiyirong" Platform.
.- DNACP: A Method of Copyright Protection for Works of Art.
.- Efficient Aggregate Signature Verification for DID-based Digital Asset Trading Platforms.
.- Blockchain-based Electronic Medical Record Access Framework.
.- Status Quo of Blockchain Technology in Germany: Industry Adoption, Research Initiatives, and Policy Frameworks.
.- Cryptocurrency Interdependency and Market Dynamics: A Network-Based Approach to Return Forecasting.
.- Analysis of Bitcoin Trading Behavior in Darknet Markets.
.- Research on the Scheme of Blockchain and RFID Technology in the Traceability of High-Value Medical Consumables.