Public vs Private Blockchain: Features, Functions, and Real-World Examples – MGBX Support Center

What Are Public and Private Blockchains?

A public blockchain, also known as a public chain, is an open blockchain network that anyone can participate in. As long as users follow the network rules, they can view data, submit transactions, and participate in maintaining the blockchain without requiring permission from any central organization.

A private blockchain is a permission-controlled blockchain network. Unlike public blockchains, it is usually managed by a single company or organization, which determines who can access data, submit transactions, and participate in the network’s consensus process.

What Are the Functions of Public and Private Blockchains?

If blockchain is compared to a city, a public blockchain is like the city’s basic infrastructure, such as roads, electricity, and communication networks, providing the foundation for the entire ecosystem to operate. Digital currencies are like the currency used in the city for transferring value and making payments. Wallets are similar to bank accounts, allowing users to manage their digital assets. Exchanges are like currency markets, helping users buy and sell different digital currencies. Decentralized finance (DeFi) is similar to financial services within the city, providing functions such as lending, trading, and asset management.

Without public blockchains, many digital assets would lack the infrastructure needed for operation and circulation. Public blockchains provide the environment for digital currencies to be issued, stored, transferred, and used, allowing users to manage digital assets without relying on centralized institutions.

Different public blockchains are like different countries’ financial systems:

Public Blockchain	Main Uses	Analogy
Bitcoin	Digital gold, store of value	Gold bank
Ethereum	Smart contracts, DeFi, NFTs	Comprehensive financial city
Solana	High-speed transactions, gaming applications	High-performance city
BNB Chain	Trading, DeFi ecosystem	Business hub

A private blockchain is like a dedicated business park built within an organization. Unlike public blockchains, it is not open to everyone. Instead, it is managed by specific organizations, and only authorized members can access and use it. The infrastructure, rules, and access permissions within this environment are controlled by the organization, allowing better management of data access.

In private blockchains, data records, business processes, and information sharing work similarly to internal enterprise management systems. For example, supply chain companies can use private blockchains to record product manufacturing, transportation, and sales processes, while banks can use them to securely share transaction information with partners. Compared with public blockchains, private blockchains place greater emphasis on data privacy, security, and operational efficiency.

If public blockchains solve the problem of building trust between unknown users, private blockchains focus on enabling organizations and partners to share information more efficiently and securely. Therefore, private blockchains are commonly used in enterprise management, supply chains, and financial institutions rather than serving as platforms for publicly traded digital currencies.

Well-Known Public and Private Blockchain Examples

Bitcoin

Bitcoin is one of the earliest and most well-known public blockchains. It operates the BTC network and provides the infrastructure for Bitcoin issuance, management, transaction records, and peer-to-peer transfers. Through the Bitcoin blockchain, users can transfer BTC without the involvement of centralized institutions, while all transaction records are verified by network nodes and permanently stored on the blockchain.

For example, when User A wants to send 1 BTC to User B, the transaction is submitted to the Bitcoin network and verified by nodes around the world. Once confirmed, the transaction is added to the Bitcoin blockchain and the asset records of both users are updated.

Therefore, the Bitcoin blockchain can be understood as a global public digital currency system that provides the underlying infrastructure for BTC operation and circulation.

Hyperledger Fabric

Hyperledger Fabric is an enterprise blockchain platform developed under the Linux Foundation and is a typical example of a private blockchain application. It is mainly used for data management and business collaboration between companies or organizations, including supply chain management, enterprise data sharing, and financial cooperation.

For example, a manufacturing company can use Hyperledger Fabric to record the complete process of a product, from raw material sourcing and production to logistics and final sales. Companies involved in the supply chain can access relevant data based on their permissions and jointly maintain records, while general users cannot access this internal information.

Therefore, Hyperledger Fabric focuses more on data privacy, permission management, and collaboration efficiency in enterprise environments, rather than providing open digital asset trading services like Bitcoin or Ethereum.

FAQ

Is Ethereum a public blockchain?
Yes. Ethereum is a public blockchain that supports ETH transfers and enables decentralized applications such as DeFi and NFTs through smart contracts.
Can private blockchains issue digital currencies?
Yes, but digital assets on private blockchains are usually used for internal management, business settlement, or permission verification rather than public trading.
Which is more secure, public or private blockchains?
They focus on different aspects. Public blockchains rely on decentralized networks for security, while private blockchains use permission controls to protect data privacy and support specific business needs.