{"id":66675,"date":"2023-03-19T21:37:38","date_gmt":"2023-03-19T16:07:38","guid":{"rendered":"https:\/\/mudrex.com\/blog\/?p=66675"},"modified":"2024-03-24T16:30:33","modified_gmt":"2024-03-24T16:30:33","slug":"public-vs-private-blockchain","status":"publish","type":"post","link":"https:\/\/mudrex.com\/learn\/public-vs-private-blockchain\/","title":{"rendered":"Public Vs. Private Blockchain: What Are the Differences?"},"content":{"rendered":"\n

Blockchain has proved to be a valuable tool for businesses. It offers solutions to various problems like data security, transparency, etc. Well, it all started in 2008 when Bitcoin<\/a>, the first decentralized cryptocurrency, launched. And Blockchain is the underlying technology behind Bitcoin. Initially, only \u2018public blockchains\u2019 existed where anyone could participate in the network. But with time, the potential of this technology became increasingly apparent. Thus organizations began to explore the possibility of \u2018private blockchains\u2019 for internal use. Public and private blockchains have unique characteristics that make them more suitable for specific use cases than others. Here we will understand their fundamental differences and provide insights into which one may fit your business.<\/p>

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<\/span>Public Blockchain Explained<\/strong><\/span><\/h2>\n\n\n\n

First, let’s define what a public blockchain is.<\/p>\n\n\n\n

Simply put, it’s a distributed ledger that anyone can access and use without needing any permission. That means anyone can participate in the network, whether you’re an individual, a business, or a government.<\/p>\n\n\n\n

Now, let’s talk about how public blockchains work.<\/p>\n\n\n\n

Imagine a big notebook where everyone can write, and every page has a unique code. Every time someone writes a new entry, it gets added to the end of the book and brings its own unique code. From a blockchain perspective, each page is a \u2018block,\u2019 and the unique code is a \u2018hash<\/a>.\u2019<\/p>\n\n\n\n

Every block in the chain has a hash linked to the previous block’s hash. It creates a chain that you can’t alter without breaking it. If someone tries to change one block, it will change the hash of every block after it. It becomes instantly apparent that something has been tampered with.<\/p>\n\n\n\n

Also, the data verification happens with the help of \u2018Consensus Mechanisms<\/a>.\u2019<\/p>\n\n\n\n

A consensus mechanism is a process by which the network participants agree on the validity of transactions. It ensures the network remains secure and transparent by adding legitimate transactions only.<\/p>\n\n\n\n

There are different types of consensus mechanisms \u2014 Proof of Work (PoW)<\/a>, Proof of Stake (PoS)<\/a>, Delegated Proof of Stake (DPoS)<\/a>, etc.<\/p>\n\n\n\n

For instance, Bitcoin uses PoW, and Ethereum <\/a>uses PoS. Each type has a different approach to validating the transaction.<\/p>\n\n\n\n

So what can you do with a public blockchain? Well, the possibilities are endless!<\/p>\n\n\n\n

Public blockchains are helpful for everything from digital currencies (like Bitcoin) to supply chain management.<\/p>\n\n\n\n

The beauty of a public blockchain is that it’s completely transparent and open. Thus it makes it easy to track and verify transactions without relying on a central authority.<\/p>\n\n\n\n

<\/span>Private Blockchain Explained<\/strong><\/span><\/h2>\n\n\n\n

Now, let\u2019s explore the private blockchain!<\/p>\n\n\n\n

A private blockchain is like a secret club. Unlike public blockchains, only a select few can join this club. They need permission from someone else to participate. These \u2018members\u2019 are typically organizations that want to use the blockchain for internal purposes, like managing their supply chain or tracking inventory.<\/p>\n\n\n\n

It’s also more secure since only trusted members can participate in the network. Thus, it is less susceptible to fraud or hacking attempts.<\/p>\n\n\n\n

Despite this, you still require a consensus mechanism in a private blockchain to validate transactions. But it\u2019s more efficient than those used in a public blockchain.<\/p>\n\n\n\n

<\/span>Differences Between Public and Private Blockchains<\/strong><\/span><\/h2>\n\n\n\n

Let’s dive into the differences between public and private blockchains.<\/p>\n\n\n\n

<\/span>1. Network access<\/strong><\/span><\/h3>\n\n\n\n

A public blockchain is open to anyone who wants to join, and there’s no need for permission. Bitcoin is an excellent example of a public blockchain.<\/p>\n\n\n\n

A private blockchain is a restricted network where only invited members can join. It’s usually used by organizations that want to keep their data secure and confidential. For example, JPMorgan Chase uses a private blockchain for their internal business operations.<\/p>\n\n\n\n

<\/span>2. Security<\/strong><\/span><\/h3>\n\n\n\n

Public blockchains have more participants, making it harder for any single node to control the network. Its decentralized nature means no central point of failure, making them more resilient to attacks.<\/p>\n\n\n\n

Private blockchains are also secure but differently. They have fewer participants, making them easier to manage and control. Private blockchains also use more advanced security features like \u2018permissioning,\u2019 which only provides access to authorized participants.<\/p>\n\n\n\n

<\/span>3. Consensus mechanism<\/strong><\/span><\/h3>\n\n\n\n

Proof of Work (PoW) and Proof of Stake (PoS)<\/a> are commonly used consensus mechanisms in public blockchains.<\/p>\n\n\n\n

PoW requires participants to solve complex mathematical problems to validate transactions, making it an energy-intensive process. PoS requires participants to hold a stake in the network to validate transactions and uses less energy.<\/p>\n\n\n\n

In contrast, a private blockchain is restricted to a limited number of participants who may already have established trust with each other.<\/p>\n\n\n\n

So, private blockchains can use less resource-intensive and more efficient consensus mechanisms, such as Practical Byzantine Fault Tolerance (PBFT). Private blockchains can also use more flexible mechanisms that can be customized to the specific requirements of the use case.<\/p>\n\n\n\n

<\/span>4. Scalability<\/strong><\/span><\/h3>\n\n\n\n

Public blockchains can handle larger transactions, but they also have scalability issues. The more transactions on a public blockchain, the slower the network becomes.<\/p>\n\n\n\n

On the other hand, private blockchains have fewer participants and handle only a smaller number of transactions. Thus, they’re faster and more efficient.<\/p>\n\n\n\n

<\/span>5. Governance<\/strong><\/span><\/h3>\n\n\n\n

Public blockchains are decentralized. It means no single entity or organization has control over the network. Instead, changes are made through community consensus. Thus, it takes time to bring changes to the network.<\/p>\n\n\n\n

Private blockchains are centralized and controlled by a single or a group of organizations. It means changes can be made more quickly, but there’s less transparency and accountability.<\/p>\n\n\n\n

<\/span>Pros and Cons of Public and Private Blockchains<\/strong><\/span><\/h2>\n\n\n\n

Let\u2019s start with the pros and cons of public blockchains.<\/p>\n\n\n\n

<\/span>Public blockchain \u2014 Pros<\/strong><\/span><\/h3>\n\n\n\n