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Satoshi Nakamoto said, don't panic. Under his mechanism, no one uses a real identity to trade, but uses a unique code to trade.
He showed the magical things in his hand, saying that these two things are called confidential seal and seal scanner. Later, he will send a confidential seal and a seal scanner to every household in the village. The roles of the two are as follows:
Confidential seals can be stamped on paper, and each stamp stamped implies a string of characters unique to the village, but it is invisible to the naked eye. It is also impossible to make a corresponding seal through observation.
The seal scanner can scan an already stamped seal, read out the hidden information, and display a string of characters on the LCD screen.
With these two magical things, everyone can trade without revealing their true identity, and the string of characters implied by the seal is the code name of the family. How to use confidential seals and seal scanners for transactions will be detailed below.