Core Viewpoint - The article discusses the evolution of trust in financial transactions, highlighting the shift from centralized systems to decentralized blockchain technology, exemplified by Bitcoin, which aims to establish trust through code rather than intermediaries [3][24]. Group 1: Blockchain Technology - Blockchain technology allows for a decentralized ledger where transactions are recorded transparently, making it difficult to alter past records, thus enhancing trust among users [5][7]. - The mechanism of "proof of work" incentivizes miners to validate transactions by solving complex mathematical problems, ensuring a fair and secure method of record-keeping [8][10]. - The UTXO model in Bitcoin tracks every unspent transaction output, providing clarity on the flow of funds, akin to physical cash management [10][12]. Group 2: Web3.0 and Digital Assets - Web3.0 aims to give users control over their data, utilizing blockchain as a "notary" to prevent arbitrary data manipulation by platforms [14][19]. - NFTs serve as digital certificates on the blockchain, ensuring ownership and provenance of digital assets, which remain secure even if the hosting platform fails [15][17]. - Decentralized finance (DeFi) eliminates the need for traditional banks by allowing users to lend and earn interest on cryptocurrencies through smart contracts, although this comes with significant risks [17][19]. Group 3: Challenges and Future Outlook - Current blockchain systems face scalability issues, with Bitcoin processing only seven transactions per second compared to traditional systems like Alipay, which can handle hundreds of thousands [21]. - Regulatory discrepancies across countries pose challenges for the global adoption of cryptocurrencies, potentially slowing the reformation of trust mechanisms [23]. - The article raises questions about the future of trust in a digital world, suggesting a shift from trusting individuals to trusting mathematics and code, with the reliability of this new trust model still uncertain [26].

Group 1: Wallet Overview - Digital wallets serve as a bridge connecting users to blockchain technology, with a focus on asset security and management [1] - Wallets can be categorized into custodial and non-custodial types, with the former managed by third parties and the latter fully controlled by users [1] - The development cost of wallets is low, but the potential for malicious activities is even lower, highlighting the importance of open-source wallets [1] Group 2: RPC Protocol - The Remote Procedure Call (RPC) protocol is essential for enabling interaction between wallets and blockchains, allowing programs to call subroutines on other computers without additional programming [3] - RPC can be synchronous, requiring the client to wait for a response, or asynchronous, allowing for callback notifications [3] - JSON-RPC has become a mainstream choice due to its stateless and lightweight characteristics, facilitating a focus on business logic rather than protocol details [3] Group 3: Wallet Development Architecture - Reliable wallet construction requires solid underlying blockchain technology support, with developers needing to adapt to various blockchain protocols [3] - For Bitcoin wallets, understanding the UTXO (Unspent Transaction Output) model is crucial for handling transaction creation, signing, and broadcasting [3] - Mobile wallet development frameworks are critical, with iOS favoring Swift or Objective-C and Android preferring Java or Kotlin, while cross-platform frameworks like ReactNative and Flutter enhance code reuse and development efficiency [3] Group 4: Core Functionality - Asset storage and management are central to wallet functionality, necessitating secure storage solutions and encryption algorithms to protect private keys [5] - Transaction functionality must balance convenience and security, ensuring accurate transaction signing and broadcasting, including gas fee calculations for Ethereum transfers [5] - Multi-currency support is becoming a competitive advantage for wallets, requiring developers to understand the technical characteristics of different cryptocurrencies [5] Group 5: Security Practices for Payment Interfaces - Key security elements can be derived from established payment platforms like Alipay, including authorization password verification for sensitive operations and mandatory parameters for transactions [6] - A comprehensive exception handling mechanism is essential for traceability of issues [6] - The development of blockchain wallet interfaces must incorporate these security practices to ensure the wallet acts as a guardian of assets [6]

Core Insights - The report by SlowMist highlights the increasing frequency of on-chain crimes in the cryptocurrency industry, with 531 security incidents reported from 2024 to the first half of 2025, resulting in losses exceeding $4.386 billion. Notably, Wallet Drainer phishing attacks alone caused approximately $534 million in losses [1][13]. Group 1: Introduction and Context - The rise in on-chain crimes includes various scams such as Ponzi schemes, phishing websites, and unauthorized access to exchanges, leading to significant financial losses [13]. - The anonymity of cryptocurrencies complicates the identification of malicious activities, making cross-border cooperation and asset freezing challenging [13][14]. - The report emphasizes the necessity for all participants in the crypto ecosystem to understand on-chain tracking knowledge as a fundamental skill [14][15]. Group 2: On-Chain Tracking Fundamentals - The handbook introduces basic concepts of on-chain tracking, covering major public chains and cryptocurrencies, including Bitcoin, Ethereum, TRON, and BNB Chain, as well as stablecoins like USDT and USDC [1][19]. - It explains core tracking concepts such as hot wallets, cold wallets, deposit addresses, contract addresses, transaction hashes, and various blockchain operations [1][25][26]. Group 3: Tools and Techniques for Tracking - The report discusses blockchain explorers, highlighting Etherscan's functionalities, which allow users to check address balances, token holdings, and transaction details [2]. - It introduces SlowMist's MistTrack tool, which features AML risk scoring and address tagging, supporting multi-chain tracking and cross-chain analysis [2][3]. - Common patterns of fund movement are analyzed, including peel chains, one-to-many distributions, and the use of mixers and cross-chain bridges [2][11]. Group 4: Response Strategies for Asset Theft - The handbook outlines measures to take in the event of asset theft, including loss prevention, preserving evidence, preliminary analysis, contacting professionals, and filing reports [2][11]. - It emphasizes the importance of multi-role collaboration in asset freezing and recovery efforts [2][11]. Group 5: Advanced Tracking Techniques - The report delves into tracking methods for cross-chain bridges, privacy tools, and NFTs, providing case studies for better understanding [2][11]. - It discusses address behavior analysis, including active behavior feature recognition and address clustering, and mentions the application of AI tools in on-chain analysis [2][11].