In general, blockchain technology has no major legal problems; it is just an encryption, data storage and distributed ledger technology (sổ cái phân tán).
It is with the use of this technology that legal issues can arise in Vietnam. So it is not that important for ordinary people to understand the technology behind it; they can use blockchain without knowing its code and programming interfaces.
When bitcoin and other cryptocurrencies first appeared, the Vietnamese authorities had no specific regulations on how to classify and handle cryptocurrencies. Accordingly, based on the silence in the law, Vietnamese authorities banned cryptocurrency transactions. The blockchain technology itself does not raise legal issues for the Vietnamese. Only the use of this technology in the form of various types of cryptocurrency tokens raises Vietnamese legal issues.