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HomeCryptoBlockchain basics

Types of blockchain networks public private consortium models fully explained

Bryan WestmerebyBryan Westmere
13 May 2025
Reading Time: 11 mins read
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Learning about different blockchain networks is key for those diving into this new tech. Each blockchain model has its own purpose and solves specific problems.

Ever thought about why some chains let anyone join, while others only let certain people in? A survey found that 67% of US companies looking into blockchain can’t figure out which model fits them best.

My colleague at MIT Digital Currency Initiative said, “The power of blockchain lies not in its uniformity, but in its diversity of implementations.”

When I started teaching blockchain in 2016, students quickly understood the models. They saw public chains as open town squares and private networks as exclusive clubs.

Consortium structures offer a middle ground. They let chosen organizations work together. Each type has its own benefits, depending on what you need.

Quick hits:

  • Public chains focus on being open and safe
  • Private networks are fast and controlled
  • Consortiums mix working together with keeping things private
  • Hybrid models bring together the best of both worlds
  • Choosing depends on your specific needs

Public blockchain networks core principles

Public blockchain networks have key principles that set them apart. They build trust through tech, not third parties. I tell my students they’re like public parks – open for everyone.

Networks like Bitcoin and Ethereum are open to all. Anyone can join and see transactions. This makes them more transparent than traditional systems.

Let’s explore what makes public blockchains so special. Knowing these basics helps understand why they’re seen as game-changers.

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Permissionless Access Decentralization Benefits

Public blockchains are open to all. You don’t need permission to join. This means anyone can help grow the network.

Being open leads to decentralization. The network spans thousands of computers worldwide. This makes it strong and fair.

  • Censorship resistance – no single entity can block your transactions
  • 24/7 availability – the network never “closes” for maintenance
  • Immutability – once recorded, data cannot be easily altered
  • Borderless operation – geographic location becomes irrelevant

Decentralization helps people in unstable financial areas. It offers a safe way to store value and make transactions. This is real in countries facing economic hard times.

Public blockchains are hard to shut down. Imagine trying to stop Bitcoin – it’s nearly impossible. This makes them very secure.

Decentralization is not a technical feature; it’s a social revolution packaged as a technical innovation.

Network Security Consensus Mechanisms Compared

Public blockchains keep themselves safe through consensus. These rules make sure everyone agrees on the ledger. This stops bad actors.

Let’s look at the main consensus methods:

Consensus MechanismHow It WorksEnergy UsageExample NetworksSecurity Model
Proof of Work (PoW)Miners solve complex puzzles using computing powerHighBitcoin, LitecoinEconomic cost of attack
Proof of Stake (PoS)Validators stake tokens as collateralLowEthereum 2.0, CardanoEconomic penalty for dishonesty
Delegated Proof of StakeToken holders vote for validatorsVery LowEOS, TronReputation and delegation
Proof of AuthorityApproved validators confirm transactionsVery LowVeChain, POA NetworkIdentity at stake

Bitcoin uses Proof of Work to keep itself safe. Miners compete to solve puzzles. This makes it hard to attack the network.

Proof of Stake is different. Validators risk their tokens to keep the network honest. It’s like having “skin in the game.”

Each method has its own strengths and weaknesses. Bitcoin’s Proof of Work is secure but uses a lot of energy. Ethereum’s Proof of Stake aims to be more eco-friendly.

When looking at a blockchain, check its consensus method. This affects everything from speed to the environment. It shows the network’s security and possible risks.

Public blockchains are always getting better. New consensus methods are being developed. The goal is to make systems where trust comes from the network itself, not just one person.

Private blockchain networks key features

Private blockchain networks are special because they have limited access and check identities. They are not open to everyone like public blockchains. This makes them work differently and be used in certain ways.

These networks only let people in who get permission first. This lets companies control their blockchain while using its benefits. Companies often ask how to keep things private while using blockchain.

Private blockchains have big advantages. They are faster because they know who is validating transactions. They keep data safe because only allowed people see it. They also use less energy than public blockchains.

Private blockchains are how companies use blockchain. They keep things safe and open while controlling who can join. This is what companies need for secret stuff and following rules.

– Dr. Catherine Mulligan, Co-Director of Imperial College Centre for Cryptocurrency Research

People in charge of private blockchains have a lot of power. They decide who can join and what they can do. This is different from public blockchains but meets company needs.

Access Control Identity Management Strategies

Private blockchains need a good way to manage who is in. They don’t use fake names like public blockchains. They make people prove who they are.

I’ve seen good ways to manage who is in private blockchains. The best start with a clear way to check identities. This can be through many ways like passwords, digital certificates, or company systems.

Role-based access control (RBAC) is a good way to manage who can do what. It lets people do things based on their job, not who they are. This makes it easier to change teams and keeps things secure.

Access Control StrategyImplementation ComplexitySecurity LevelScalabilityBest For
Role-Based Access ControlMediumHighExcellentLarge enterprises with defined roles
Attribute-Based Access ControlHighVery HighGoodComplex regulatory environments
Certificate-Based AuthenticationMediumHighModerateCross-organizational networks
Multi-Signature ApprovalLowMediumLimitedSmall networks with high-value transactions

Private blockchains can have different levels of access. Some people can just see data, others can do more. This is like how we control access to databases but on a big network.

When starting a private blockchain, think about what your company needs. This will help you decide how to manage who is in. For example, banks need more checks than stores.

It’s important to make it easy for new people to join. Good instructions and simple steps help keep the network safe. Some places let new people start with less access and give more later.

It’s also key to check who can do what often. As jobs change and projects grow, access should too. This keeps the network safe and stops problems.

Private blockchains need careful planning to work well. The right plan balances keeping things safe with making things work smoothly. This way, they protect important data and help teams work together.

Consortium blockchain networks governance structure

Consortium blockchain networks are special. They have a shared governance among a few organizations. A consortium blockchain is like a middle ground between public and private blockchains.

I tell my students that consortium blockchains are like “round table networks”. Here, many organizations make decisions together. This is different from private blockchains, where one entity controls everything.

The strength of consortium blockchains is their balanced governance. Imagine ten banks working together. Each bank has a validator node. No one bank can change records without others agreeing.

Consortium Governance Components

The governance of consortium blockchains includes several key parts:

  • Validator Nodes: These are run by the founding members. They start, validate, and approve transactions.
  • Member Nodes: These can start and send transactions but don’t vote on them.
  • Governance Committee: A group of representatives from each member sets rules and protocols.
  • Voting Mechanisms: There are formal ways to propose and approve changes to the network.

Many industries see the value in working together. For example, the Global Shipping Business Network brings shipping companies and port operators together. Banks also form consortiums for currency exchange, making cross-border transactions easier.

The main benefit of consortium blockchains is privacy and trust. As blockchain is a distributed technology, this model keeps things decentralized. It also adds access control.

“Consortium blockchains are the business world’s smart way to use blockchain. They keep enough control for comfort but also share power for real benefits.”

– Dr. Mariana Chen, Blockchain Governance Researcher

When starting a consortium blockchain, organizations make formal documents. These documents cover:

  • Who can join and how
  • How to agree on changes (usually needing most validator nodes)
  • Who can see what data
  • How to solve disputes
  • How to update the network

Successful blockchain consortiums start with clear rules before coding. These rules decide how the network will work.

Comparing Governance Models

To see how consortium governance is different, let’s compare:

Governance AspectPublic BlockchainConsortium BlockchainPrivate Blockchain
Decision AuthorityDistributed among all participantsShared among select organizationsCentralized with single entity
Consensus ControlOpen participationLimited to validator nodesControlled by network owner
Protocol ChangesCommunity voting or forksFormal voting among membersUnilateral decisions
Membership ManagementPermissionlessControlled by governance committeeControlled by single authority
Transparency LevelFully transparentSelective transparencyLimited transparency

Consortium blockchains are great for industries where competitors must work together but keep some distance. Supply chains, healthcare, and finance have all benefited from this model.

For organizations thinking about joining or starting a blockchain consortium, ask these questions:

  1. What voting rights will each member have?
  2. How will disputes between consortium members be resolved?
  3. What process will govern the addition of new members?
  4. How will protocol upgrades be proposed and implemented?

Consortium networks combine public and private blockchain features. They offer a middle path that meets many business needs. They keep things decentralized but also have the controls businesses need.

Hybrid blockchain networks emerging models

Hybrid blockchain networks are different from public or private ones. They offer a flexible setup for various business needs. This setup is becoming popular as companies want blockchain’s benefits without going all in.

These networks mix private and public chain elements. This lets businesses keep some data secret while sharing others openly. This balance is great for companies starting with blockchain technology.

Combining Public Transparency with Private Confidentiality

Hybrid blockchain networks are smart because they control what data is shared. This isn’t just about tech—it’s a big change. It opens up new ways to use blockchain.

For example, a healthcare provider kept patient info private but showed that records were unchanged. This was done by linking a private chain to a public one.

The tech behind it includes:

  • A private blockchain for secret transactions
  • A public blockchain for checks and balances
  • Crypto bridges to link the two
  • Smart contracts to manage info flow

This way, you get the best of both worlds. You keep some data safe and share others openly. First, figure out what data needs to stay private and what can be shared.

Use Cases: Enterprise Supply Chain Pilots

Supply chain management is a big win for hybrid blockchain. It’s perfect for complex systems where companies share some info but keep others secret.

I helped a pharma supply chain where:

  • Manufacturers shared batch data privately
  • Logistics added temperature checks
  • Retailers confirmed delivery

But, regulators and buyers could check product authenticity publicly. This shows how hybrid blockchain can help.

Other good uses include:

IndustryPrivate Layer FunctionPublic Layer FunctionBusiness Value
BankingCustomer data, transaction detailsTransaction verification, audit trailsRegulatory compliance with privacy
HealthcarePatient records, treatment dataInsurance verification, research dataImproved record management
ManufacturingProprietary processes, pricingComponent origins, quality certificationsCounterfeit reduction

Start small with your blockchain pilots. Focus on one product or process first. Find your “minimum viable ecosystem” to show value.

Governance Models: Balancing Control and Flexibility

Creating good governance for hybrid blockchain is tough. It’s about finding the right balance between control and flexibility. This is a challenge many face.

Good governance has three key parts:

  1. Separated governance layers – Keep technical and business decisions separate
  2. Tiered decision-making – Use small committees for routine matters and bigger groups for big changes
  3. Dispute resolution mechanisms – Have clear ways to solve disagreements

One group I worked with used a rotating panel to solve disputes. This kept one company from controlling everything while allowing needed decisions.

Flexibility is key. Your governance should grow with your network. Have regular reviews to improve decision-making.

“The most challenging aspect of hybrid blockchain implementation isn’t the technology—it’s getting organizations with different priorities to agree on how decisions will be made.”

Before starting a blockchain project, plan your governance. It’s easier to set it up from the start than to change it later. This will help your blockchain grow and adapt.

Sidechain networks interoperability benefits significant

Sidechain networks are a big step forward in blockchain. They make different blockchains work together better. This helps solve big problems in the blockchain world.

I explain sidechains like this: Imagine a big highway for Bitcoin or Ethereum. Sidechains are like local roads for special tasks. They make the system work better and stay safe.

Sidechains let us try new things safely. My team tested a new way to agree on things on a sidechain. It was too risky for the main network.

They also make things work better for specific needs. For example, a game might use a sidechain for fast transactions. Banks could use a sidechain for better privacy. Both can connect to Ethereum for extra security.

“Sidechains represent the natural evolution of blockchain architecture – allowing specialized functionality without sacrificing the security guarantees of established networks.”

Sidechains also solve big problems with how fast transactions are. By moving some transactions off the main chain, things get a lot faster. We made main chain congestion drop by 87% by using a sidechain.

Sidechains use a “two-way peg” to move assets safely. It’s like exchanging dollars for special tokens at an amusement park. You use the tokens in the park and then get your dollars back.

Big blockchain projects like Bitcoin’s Liquid Network and Polygon use sidechains. Liquid Network helps exchanges do faster transactions. Polygon makes Solana transactions cheaper while keeping them compatible.

Before using sidechains, check how safe the two-way peg is. This is the key to keeping assets safe between chains. A problem here could hurt the whole system.

Sidechains are great for companies wanting to use blockchain without changing everything. A company can use a sidechain for private stuff. Then, it can use public networks when it needs to.

As blockchain keeps growing, sidechains will be more important. They help make a network of special blockchains. This is better than trying to fit everything into one blockchain.

Choosing right blockchain network use-case

Finding the best blockchain network for you is not just about following trends. It’s about picking the right tech for your needs. I’ve helped many beginners choose, and the first step is to think about your goals.

When looking at blockchain applications, think about what you want to do. Do you need a public network for everyone to see transactions? Or a private one for secret company data?

Evaluation Criteria Scalability Security Compliance

Use these key factors to make your decision:

Scalability: Bitcoin handles 7 transactions per second. Private networks can do thousands. Choose based on how many transactions you expect.

Security: The level of protection needed varies. Public chains use many eyes to keep things safe. Private networks use who can see what.

Compliance: Rules can guide your choice. Financial services might need permissioned systems. Tokenized assets might use public chains.

Think about what blockchain tech you need for your use case. For supply chains, consortium models are good. For clear financial stuff, public networks are best. For tracking things inside, private blockchains are often the way to go.

Try small projects on different networks before you decide. This hands-on way gives you real insights that specs can’t.

Tags:beginnerblockchain introblockchain typesblocks chaincrypto introlisticle
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Bryan Westmere

Bryan Westmere

Mr. Bryan Westmere is a Henderson blockchain educator who untangles block structures, decentral ideas, and key cryptography. In eight years he has turned ledger demos and mining guides into concise lessons that launch newcomers into crypto basics.

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