As a peer-to-peer electronic cash representative, Bitcoin is sought after and respected for its decentralization and lack of central authority, but it is also used by some criminals.
We know that all transaction information on the blockchain is public and transparent. Sending bitcoin is sent from one address to another, and these addresses are all composed of numbers and letters. Before the address does not correspond to people, bitcoin It is anonymous, but once this relationship is contacted, it is not anonymous.
Therefore, bitcoin is pseudo-anonymous. Once the address is associated with a person, the digital asset information is equivalent to being exposed, so some people will be particularly worried about this.
- "Dark net" black trading eco exposure: buying and selling personal information, drugs, using bitcoin transactions, multiple large cases were investigated
Based on this demand, there are services on the dark network that can help users hide transaction information, which can further improve privacy and anonymity. This tool is called Bitcoin Obfuscator.
For example, if Pharaoh wants to transfer 10 BTCs to Lao Li, but he wants to hide the trading information, then you can use the Bitcoin blender for a long time. Through the blender, the 10 BTCs will be sent to the random number at different times. Different addresses, these addresses will also be traded multiple times, and finally the address of Lao Li will receive 10 BTCs that are actually transferred by Lao Wang.
So if no one knows the transaction between Lao Wang and Lao Li, it is difficult to link Lao Wang and Lao Li, so the transaction information is further hidden.
This obfuscator that helps users hide transaction information can be divided into two according to the principle, one is a centralized obfuscator, and the other is a distributed obfuscator.
Centralized obfuscator All transactions are processed in the database of the website. In this case, the obfuscator is used to match different wallet addresses and different amounts, and send a random amount of bitcoin to each address until The total amount requested by the sender to arrive at the specified address.
This obfuscator is simple and convenient to use. Just enter the corresponding address in the form on the obfuscator website and press the Enter key. Despite this, its risk is still very obvious, because it is centralized, so the user's digital assets will be stolen and lost.
Centralized obfuscators include MixerTumbler, BestMixer.io, Blender.io, BitcoinFog, GramShelix, and others.
This type of obfuscator does not exist. The middleman is freely exchanged by different users to use the protocol to achieve confusion.
The mode is that there is no intermediary, there is no risk of centralized confusion, but its shortcoming is that there is a need to have people who want to confuse the transaction, if there is no one or the number is not enough to continue.
Distributed bitcoin obfuscators include CoinJoin, SharedCoin and CoinSwap.
About transaction costs
At present, the service fee of most obfuscators is charged according to the percentage of the total amount of confusion, the ratio is between 1% and 3%, but the more service fees are processed, the more the service fee will be reduced accordingly.
About the obfuscator
In July 2017, BitMixer, the world's longest-lived bitcoin obfuscator, announced the closure of the station, because the US government found that a large number of criminals used BitMixer to transfer bitcoin and evade the authorities' tracking, so in this situation Next BitMixer announced that it would stop operating.
After the closure, there are many obfuscators emerging from the market, but it is worth noting that many of them are scams in the name of obfuscators, and they are not actually provided. According to the current confusion in the market, most people who use obfuscators will choose multiple obfuscators to confuse multiple times, which makes it more difficult to track.
There is a market for demand, although there is no clear data to prove how many people use the obfuscator to commit crimes, but it is certain that the use of obfuscators is the most illegal or gray industry, and now the supervision The gradual penetration and the increasing popularity of anonymous coins such as Monroe Das have further weakened the market for Bitcoin confusing devices.