Taiwan's grassroots police officer training test "Currency Flow Tracking"
Fraud is so rampant in Taiwan that the Police Department has even launched an "Anti-Fraud Dashboard" to count the amount of fraud reported daily. In many fraud cases, many criminals will use blockchain transfers to transfer stolen money or launder money, thinking that they can hide the cash flow and prevent the police from catching it.
However, in recent years, the Taiwan police have gradually kept up with the times and begun to learn how to track gold flows on the chain (currency flow tracking). Recently, a netizen shared on Threads the topic of the subject training for grassroots police officers in the second half of 2013, which tests the police officers’ basic currency flow tracking capabilities.
Basic currency flow tracking questions
The question is: Please find the wallet address of the currency merchant (Party A) from this picture.
Party B purchased 19,194 Tether coins ($USDT) from Party A for NT$610,000. Party B’s account address (wallet) is as shown in the picture, and you need to find the correct answer from the following 4 wallet addresses:
A) TFAkdCwqwSPDe6vLRHf4dP6hFUMfYcZhGf
B) TZEbLz4FpLCfknRHA65DA8KmS6gpfnq7eM
C) TWDiH4DhZxxFdSodY56Bw2hDUmXrX57eM
D) TXQDNcLx5Yao12q9TEwf3rQwrD6PN8je6S
Picture source: Threads netizens photographed the problem of tracking the currency flow of grassroots police officers in 113 years
Although the question pointed out: "This is just a preliminary test question on currency flow tracking!" However, the netizen who posted the post (now deleted) said: "Brother, this is too difficult." The netizen who left a message below was also curious: "Only Party B is mentioned (Address), how can I find Party A?”
Answers to police coin flow tracking questions?
In fact, this is indeed a very basic currency flow tracking problem. I believe that citizens who have a certain foundation in blockchain browsers and know how to query wallet address transfer records should already know how to find the answer, right?
It doesn’t matter if you don’t know how to solve it at all. Below (Crypto City) will provide the answer and teach you how to query blockchain records in daily life.
The steps to solve the problem are as follows:
Step 1: Open the blockchain analysis tool
Open a blockchain browser or analysis tool (Arkham, OKlink, Tronscan, etc.). OKLink is used as an example below. Because it supports Chinese and the interface is simple and intuitive, it is easy for novices to get started.
Under normal problem-solving steps, it is usually enough to paste Party B's address on the search page. However, since the handwritten address in the picture of this question is difficult to see clearly, we can back-reference from the four answers.
Step 2: Paste the address and set search conditions
After pasting the address of option A, we can see the cryptocurrency currently held by the wallet, and sliding below is his transfer record.
Then we can use the two pieces of information provided by the question: transfer amount (19,194) and token name (USDT) to see if option A meets the conditions. The query method is: select "Token Transfer" > "TRC20" (Note) > "Set search conditions: Token name USDT, transaction amount 19,194".
If the conditions are not met, copy and paste the addresses of options B, C, and D in order to search.
Note: TRC-20 is the token standard issued by Tether ($USDT) on the TRON blockchain. The address of USDT-TRC20 starts with a capital T.
Source: OKLink Taiwan Police Blockchain Transfer Currency Tracking Questions and Answers
Source: OKLink Taiwan Police Blockchain Transfer Currency Tracking Questions and Answers
Step 3: The solution is found to be D
According to the search results of (CryptoCity), only option D can find the transfer record of 19,194 $USDT. At this time, we see the recipient's address. Is it the same as the handwritten "Party B's address"?
Source: OKLink Taiwan Police Blockchain Transfer Currency Tracking Questions and Answers
Source: OKLink Taiwan Police Blockchain Transfer Currency Tracking Questions and Answers
If you want to fully learn about blockchain transfers and currency flow tracking, you can refer to: Cryptocurrency novices can use it too! 7 Free On-Chain Analysis Tools An Introduction What is Blockchain? Blockchain Lazy Pack helps you understand the advantages and features of blockchain in a simple way
The High People’s Procuratorate already has a currency flow analysis team
Pushing back the sender/receiver wallet address through the unilateral address, transfer currency and amount can be said to be one of the must-learn knowledge for novices in the currency circle, so it is not surprising that it is listed as a basic currency flow tracking topic.
In fact, in order to better "handle cases on the chain," the Taiwan High Prosecutor's Office has adopted the on-chain analysis tool Chainalysis Reactor in 2023, and assigned 5 prosecutorial officers to set up a virtual currency cash flow analysis team to participate in the original factory training. All have obtained the original factory certification analysis certificate.
Advantages of decentralized ledgers: Everyone can check transfer records
In a cash flow structure dominated by banks, personal accounts and transfer records are usually private information that can only be seen by the account holder or specific parties, and the bank keeps accounts for you.
But in the concept of distributed ledger, everyone can participate in accounting, and the transactions, actions or transfer records recorded through this ledger can also be searched through the blockchain browser. In the "Creative Private House Incident", the currency circle self-media (blockchain) used tools to find the criminal cash flow, but he himself was not a policeman.
Extended reading: Creative private rooms block the Internet! Legislator: Blockchain records criminal evidence of "earning 30 million", can the leader be caught?
Just like a few years after the development of the Internet and smartphones, most people now know how to operate computers and mobile phones. Perhaps after blockchain is really popular, people in the future will also have the opportunity to treat currency flow tracking as basic knowledge!