{"id":4159,"date":"2022-11-24T17:58:04","date_gmt":"2022-11-24T12:28:04","guid":{"rendered":"https:\/\/mudrex.com\/blog\/?p=4159"},"modified":"2024-03-24T16:28:40","modified_gmt":"2024-03-24T16:28:40","slug":"blockchain-consensus-mechanisms","status":"publish","type":"post","link":"https:\/\/mudrex.com\/learn\/blockchain-consensus-mechanisms\/","title":{"rendered":"What Is Consensus in Blockchain, and What Kinds of Mechanisms Are There?"},"content":{"rendered":"\n

Are you part of a joint family? Or have you worked on any group projects? Or have you planned a trip with your friends?<\/p>

\"\"<\/a><\/div>\n\n\n\n

If your answer is ‘yes’ to any of these questions, you would know how difficult it is to agree unanimously on something as a group. When many people are involved, it takes a lot of time to convince everyone to reach a conclusion.<\/p>\n\n\n\n

Now think of blockchain, which is decentralized. Several nodes across the globe work together to make critical decisions.<\/p>\n\n\n\n

How do they even do that? Well, they use a tool called \u2018Consensus Mechanism.\u2019<\/p>\n\n\n\n

In this post, we will explore the concept of the consensus mechanism and its types. Also, I will answer how nodes reach a consensus in the blockchain network using these methods.<\/p>\n\n\n\n

But before jumping into the consensus mechanism, we hope cryptocurrency is part of your investment portfolio; if not, check out Mudrex Coin Sets<\/a>. It is an index fund-like product suitable for long-term wealth generation.<\/p>\n\n\n\n

<\/span>Definition of Consensus Mechanisms<\/span><\/h2>\n\n\n\n

The technical definition of ‘Consensus Mechanism’ goes like this.<\/p>\n\n\n\n

A consensus mechanism is a fault-tolerant method used by multiple agents or network participants in blockchain protocol to agree upon a single network state. It is mainly helpful in distributed record-keeping.<\/p>\n\n\n\n

I know it might be confusing. Let me break it down further.<\/p>\n\n\n\n

So the term ‘Consensus’ means a general agreement. It is the opinion or decision reached by a group as a whole.<\/p>\n\n\n\n

From a blockchain standpoint, a consensus is a process by which a group of participants (or nodes) on a network finalizes whether a blockchain transaction is valid.<\/p>\n\n\n\n

Consensus mechanisms are the methods utilized to reach this agreement. They are a standard set of rules that safeguard the network from bad actors. The consensus mechanisms are also known as consensus protocols or consensus algorithms.<\/p>\n\n\n\n

There are different types of consensus mechanisms, and they vary based on several factors. These factors include security level, throughput capability, energy consumption, etc.<\/p>\n\n\n\n

But all of them share one common goal: to ensure the ledger records are honest.<\/p>\n\n\n\n

<\/span>Why Blockchains Require Consensus Mechanisms<\/span><\/h2>\n\n\n\n

Consensus mechanisms are the foundation for blockchain networks to function seamlessly.<\/p>\n\n\n\n

Before we explore its importance, let’s look at how blockchain protocols work.<\/p>\n\n\n\n

A public blockchain is a decentralized<\/a>, distributed ledger that records transactions in the form of blocks of data. Peer-to-peer computer nodes must independently validate these blocks before adding them to the chain.<\/p>\n\n\n\n

This method helps in securing the network against fraudulent transactions and double-spending. As multiple parties must agree on a single version of the ledger, the networks implement consensus mechanisms to achieve it.<\/p>\n\n\n\n

<\/span>Types of Blockchain Consensus Mechanisms<\/span><\/h2>\n\n\n\n

If you are following cryptocurrencies and blockchain, you might have heard of terms like Proof of Work or Proof of Stake<\/a>.<\/p>\n\n\n\n

Well, these are some of the well-known consensus mechanisms. But apart from these two, there are many other algorithms in use.<\/p>\n\n\n\n

We will look into the top eight protocols in detail.<\/p>\n\n\n\n

<\/span>1. Proof of Work (PoW)<\/span><\/h3>\n\n\n\n

Proof of Work (PoW)<\/a> was the first consensus mechanism to come into existence. The term was first coined during the 1990s but was implemented by Satoshi Nakamoto<\/a> in Bitcoin<\/a>. After which it was adopted by other blockchains of that time. PoW is typically considered the most secure and reliable protocol compared to others.<\/p>\n\n\n\n

Stakeholders: <\/strong>Miners<\/p>\n\n\n\n

Working Mechanism: <\/strong>Miners use sophisticated hardware infrastructure and mining methods to compete with each other to crack highly complex mathematical puzzles. They can solve these with numerous trials and errors. Hence, miners require a staggering amount of computational power to solve the puzzles quickly. The first miner to find the 64-digit hexadecimal number (known as ‘hash’) wins the right to form a new block and validate the transactions.<\/p>\n\n\n\n

Reward System: <\/strong>The successful miner is rewarded with a predetermined amount of crypto, known as the block reward. <\/p>\n\n\n\n

Merits:<\/strong><\/p>\n\n\n\n