Core Content: Full Cryptocurrency Forensics Workflow
According to a report by the South China Morning Post, Sun Shengbin from the Wenzhou Public Security Bureau and Lou Yandi from the Criminal Investigation Corps of Zhejiang Provincial Public Security Department published a technical paper on June 4 in the journal 'Criminal Technology' (Xingshi Jishu). The paper systematically discloses Chinese police forensic tools and case-handling procedures for virtual currencies such as Bitcoin and Ethereum. It covers device cracking, evidence collection, on-chain transaction tracing, and asset freezing and seizure.
Tracing Methods: Transaction Fee Analysis and Exchange KYC Acquisition
The paper outlines several tracing methods, one of which involves tracking transaction fees to trace back to exchanges like Binance, enabling police to obtain user data. Through legal channels, authorities can acquire Know Your Customer (KYC) records from major exchanges including Binance, OKX, and HTX. For funds held on exchanges, police can freeze accounts for six months, and the freeze period can be extended.
Operational Boundaries: Private Key Management and Supervision Mechanisms
The paper emphasizes strict operational boundaries: investigators must not hold private keys themselves. The principle of 'separation of case handling and custody' must be adhered to, with comprehensive supervision and a clear chain of custody records to ensure the legality and traceability of the forensic process.