Svmuu News: The South China Morning Post reported that Sun Shengbin of the Wenzhou Municipal Public Security Bureau, Lou Yandi of the Criminal Investigation Corps of the Zhejiang Provincial Public Security Department, and others published a technical paper on June 4 in the journal *Criminal Technology*, systematically detailing the processes for evidence collection, tracking, seizure, and freezing in cases involving cryptocurrency.
The report indicates that investigators can identify assets by scanning private keys, mnemonic phrases, screenshots, and chat logs from mobile phones, computers, and hardware wallets; if private keys cannot be directly obtained, they can conduct tracking by combining blockchain transaction records, cross-chain transfer paths, the flow of mixed funds, and real-name information from exchanges. For confirmed assets related to the case, police can transfer them to a controlled wallet by replacing the private key or coordinate with exchanges to freeze accounts. The report also emphasizes that the custody of private keys must be separated from case handling, and complete supervisory records must be retained.