What is Blockchain?
Blockchain is a technology for storing and managing data in the form of a distributed ledger, where information is recorded in blocks that are cryptographically linked together and continuously expanded over time. Each block contains transaction data and is validated by the network before being added to the chain, forming a continuous and tamper-resistant record-keeping system.
You can think of blockchain as a shared digital ledger that is publicly accessible, where data can only be appended (append-only) and cannot be modified or deleted once it has been accepted by the network.
Blockchain is a key technology in digital transformation, unlocking the potential to fundamentally change how data is stored, verified, and shared—not only in finance, but also in public administration, education, healthcare, logistics, and even digital asset ownership.
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The Evolution of Blockchain: From Bitcoin to National-Scale Applications
Blockchain did not emerge as a fully developed infrastructure from the beginning. Instead, it has evolved through multiple stages-from a technology initially designed to support cryptocurrencies to a foundational platform for data governance and large-scale applications.
1. Blockchain 1.0: The Era of Digital Currency (Internet of Money)
The journey began with the emergence of Bitcoin in 2009, introduced by the mysterious entity Satoshi Nakamoto. Blockchain 1.0 focused solely on its role as a peer-to-peer payment protocol. This phase marked the birth of the “Internet of Money,” enabling cross-border value transfers without relying on central banks, and laying the foundation for the world’s first decentralized ledger system.
2. Blockchain 2.0: The Era of Smart Contracts
In 2013, the introduction of Ethereum elevated blockchain to a new level. By integrating smart contracts, blockchain evolved from a simple payment tool into a programmable platform. This phase enabled the automation of legal agreements, significantly reduced the need for intermediaries, and minimized the risk of fraud in transactions.
3. Blockchain 3.0: The Era of Decentralized Applications (DApps)
The period from 2019 to 2022 witnessed an explosion of DApps (Decentralized Applications), expanding into entertainment and digital art sectors such as GameFi and NFTs. Blockchain 3.0 addressed the challenge of interoperability, enabling different networks to “communicate” and exchange data, thereby forming a dynamic early-stage Web 3.0 ecosystem.
4. Blockchain 4.0: The Era of Mass Adoption (Blockchain for Mass Use)
This is the current phase (from 2024 to present), where blockchain is entering real-world commerce and national governance. The focus of Blockchain 4.0 lies in unlimited scalability, strict regulatory compliance, and widespread adoption through models like BaaS (Blockchain as a Service). In this stage, blockchain closely integrates with AI, IoT, and real-world assets (phygital) to directly address challenges faced by governments and large enterprises.
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Core Characteristics of Blockchain
1. Decentralization: Eliminating Centralized Control
Blockchain operates on a peer-to-peer (P2P) network, where data is simultaneously distributed across thousands of nodes rather than stored on a single server. This characteristic completely removes the risk of a “single point of failure,” ensuring continuous system operation and preventing control or manipulation by any individual or organization.
2. Transparency: Public and Verifiable
All transactions on the blockchain are publicly recorded and access is shared among all participants in the network. This transparency allows anyone to inspect and verify the authenticity of the data, creating a business environment with no informational “blind spots.”
3. Security: A Cryptographic Shield
Data on the blockchain is protected by advanced cryptographic algorithms and strict consensus mechanisms. Attempting to attack or alter the data would require enormous computational power across the entire network, making blockchain one of the most secure storage technologies today against unauthorized access.
4. Automation: Human-Free Operation
Through Smart Contracts, blockchain can automatically execute transaction terms once predefined conditions are met. This capability eliminates cumbersome administrative procedures, reduces human error, and accelerates operational efficiency for businesses.
5. Anonymity: Protecting Digital Privacy
Although all transactions are transparent, users’ real identities are typically protected through encrypted wallet addresses. This anonymity (or pseudonymity) enables secure transactions without revealing sensitive personal information, unless required under Self-Sovereign Identity (SSI) compliance frameworks.
6. Immutability: A Tamper-Proof Ledger
Once data has been validated and recorded into a block, it remains permanent and cannot be altered or deleted. This immutability creates a verifiable historical record (Proof of Existence), serving as a critical foundation for resolving legal disputes and protecting ownership rights.
7. Traceability: Tracking the Flow of Data
Blockchain records the entire history of data from its origin to the present. This end-to-end traceability is a key advantage for the logistics industry, enabling real-time tracking of goods, ensuring authenticity, and preventing counterfeiting and fraud.
8. Trustless: Trusting Math Instead of Promises
Within the blockchain ecosystem, parties do not need prior relationships or mutual trust to conduct transactions. Trust is placed in mathematical algorithms and open-source code. The system guarantees that once rules are defined, transactions will be executed exactly as intended.
9. Global: Removing All Boundaries
Blockchain is a borderless internet protocol that enables the transfer of value and data across countries almost instantly. This characteristic empowers Vietnamese businesses to seamlessly connect and trade with global markets without facing barriers related to payment infrastructure or complex intermediaries.
Blockchain at the National Scale: A Sustainable Digital Trust Infrastructure
In Vietnam, NDAChain is being implemented in alignment with Decision No. 1131/QĐ-TTg, in which blockchain is identified as one of the country’s strategic technologies and products. This serves as a foundation for deploying digital infrastructure that supports national digital transformation in a structured and well-regulated manner.
NDAChain is developed as a Layer 1 blockchain platform, designed to support authentication, identity, and data traceability functions. Built on this foundation are applications such as NDAKey (self-sovereign identity) and NDATrace (product and goods traceability), which aim to enhance data management and improve information verification across multiple sectors. These systems are designed in accordance with international standards such as World Wide Web Consortium DID, enabling interoperability and compatibility with global data ecosystems—particularly in trade and export activities.
Vietnam is currently among the countries with the highest rates of cryptocurrency and blockchain adoption in the world, with over 20 million users—accounting for nearly 20% of the population. With the launch of NDAChain, Vietnam is demonstrating a strong commitment to building a secure, trustworthy, and transparent digital infrastructure to support its national digital transformation strategy.
Unlike many countries where blockchain has developed in a largely organic and unregulated manner, Vietnam is taking a structured approach: “state-led, enterprise-driven, and citizen-centered.” Through NDAChain, pressing challenges faced by a rapidly developing nation—such as counterfeit goods, online fraud, data falsification, non-transparent transactions, and misuse of personal data—are being addressed in a proactive, secure, and controlled way.
As a data authentication infrastructure, NDAChain contributes to the creation of a digital environment where information can be verified, traced, and reused across multiple systems. This is considered a foundational element in building digital trust, enabling a wide range of future applications—from e-commerce to public services.
Core Infrastructure Safeguarding National Digital Sovereignty
NDAChain is the result of the expertise and dedication of Vietnamese engineers and technology specialists, many of whom have worked in Silicon Valley, bringing back international experience and translating it into locally adapted solutions suited to Vietnam’s legal and social context. More than just a technology platform, NDAChain represents a vision of a Vietnam that dares to think big, masters its core technologies, and reduces dependence on foreign platforms.
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In a context where many countries are still debating how to regulate blockchain, Vietnam has taken a proactive approach—shaping the playing field and building a national technology ecosystem that is both open and secure. NDAChain is expected to serve as a foundational data authentication layer, supporting digital government, the digital economy, and digital society systems, while ensuring requirements for information security and national data sovereignty are met.
