Blockchain Basics

Blockchain Overview:

• Blockchain is a type of digital ledger technology that makes it possible to build decentralized, transparent, and safe networks. A blockchain is a distributed database that is not controlled by a single entity but rather by a network of computers called nodes. A copy of the database, which holds a history of every transaction made on the blockchain, is kept on every node in the network.

• Numerous nodes inside the network use complex cryptographic methods to verify and confirm every transaction on the blockchain. A new block is added to the blockchain when a transaction is approved and verified, completing the chain. All nodes inside the network get this block and update their respective copies of the blockchain accordingly.

• The reason the blockchain is regarded as safe is that each block in the chain is connected to the one before it, forming an unbreakable transaction chain. A block is a tamper-proof record of every transaction that has ever taken place on the blockchain since once it is added, it cannot be removed or changed.

• Applications for blockchain technology are numerous and include voting systems, healthcare, supply chain management, finance, and more. Its potential is found in its capacity to foster security, trust, and openness across a range of industries, do away with the need for middlemen, and open the door to new business models.

Why do we need blockchain?

1. Decentralization: Establishing decentralized systems is one of the main goals of employing blockchain technology. A decentralized network is more transparent, safe, and resistant to censorship and corruption since it lacks a central authority or middleman to exert control over it.

2. Security: Cryptographic algorithms are used by blockchain technology to protect data and transactions. Multiple parties validate and verify each transaction on the blockchain, making it more difficult for an unauthorized person to change the data or steal information.

3. Transparency: By generating an immutable ledger of every transaction, blockchain technology promotes transparency. As a result, trust and accountability are encouraged because every member of the network can view every transaction that has occurred and confirm its legitimacy.

4. Efficiency: Through the removal of middlemen and the automation of procedures, blockchain technology can lower transaction costs and boost efficiency. Businesses can cut expenses and boost revenues by expediting and streamlining transactions by doing away with middlemen.

Types of Blockchain:

There are generally three types of blockchain: public, private, and hybrid.

1. Public Blockchain: Anyone can access and participate in a public blockchain, which is a decentralized blockchain network. Anyone can read and write data on the network and join it. The public blockchains of Ethereum, Litecoin, and Bitcoin are examples.

2. Private Blockchain: A permissioned blockchain network is one in which only individuals with permission are able to access and engage with the network. Private blockchains are usually utilized by businesses or by a select group of reliable and well-known individuals. The Quorum, Corda, and Hyperledger Fabric private blockchains are a few examples.

3. Hybrid Blockchain: A hybrid blockchain is made up of elements from both private and public blockchains. Because it enables authorized users to access and engage with both the public blockchain network and the private network, it provides the best of both worlds. Aion, Dragonchain and other hybrid blockchains are examples of it.

Apart from the aforementioned trio of blockchain styles, there exist additional varieties or adjustments to the three main types of blockchains. A type of private blockchain known as a consortium blockchain, for instance, is one in which a number of businesses band together to cooperatively run and maintain the network.

Blockchain Applications:

Blockchain technology has a wide range of applications across various industries. Here are four examples of how blockchain is being used:

1. Cryptocurrencies: The development and utilization of cryptocurrencies such as Bitcoin, Ethereum, and Litecoin is the most well-known application of blockchain technology. These digital currencies employ blockchain technology to enable safe, peer-to-peer transactions. They are decentralized, which means they are not governed by any financial organization or government.

2. Supply Chain Management: By generating a safe, transparent record of each transaction that takes place in the supply chain, blockchain technology is being utilized to enhance supply chain management. This promotes efficiency, lowers fraud, and strengthens confidence between all supply chain participants.

3. Identity Verification: People can establish safe, immutable digital identities for themselves using blockchain technology. This can lessen fraud and identity theft and make it simpler for people to authenticate themselves in a range of situations.

4. Smart Contracts: Smart contracts are self-executing agreements that automatically carry out their terms by utilizing blockchain technology. This can improve contract execution efficiency and speed while also lessening the need for middlemen like banks and lawyers. Financial services, insurance, and real estate are just a few of the businesses using smart contracts.

Ethereum Vs Bitcoin:

Ethereum and Bitcoin are both decentralized blockchain platforms that have some similarities but also some
important differences. Here are some key differences between Ethereum and Bitcoin:

1. Ethereum was intended to serve as a platform for smart contracts and decentralized applications (Dapps), whereas Bitcoin was intended to serve as a decentralized digital currency.

2. Bitcoin uses a Proof of Work (PoW) mining method, which, in order to validate transactions and add new blocks to the blockchain, consumes a significant amount of processing power and energy. Nowadays, Ethereum employs the more energy-efficient PoS algorithm.

3. While Bitcoin has a limited scripting language for transactions, Ethereum allows developers to create custom smart contracts and decentralized applications using a variety of programming languages, such as Solidity, Vyper , and Rust.

4. The processing speed of Ethereum transactions (15-20 tps) is generally faster than that of Bitcoin (7/8 tps), with an average block time of approximately 15 seconds, as opposed to 10 minutes for Bitcoin. This is achieved through scalability. The network congestion that causes high fees and delayed transaction times during peak demand is one of Ethereum's scalability problems.

5. Ethereum does not have a fixed supply; instead, new Ethereum tokens are created through mining and transaction fees. Bitcoin has a finite quantity of 21 million coins.

6. In Bitcon, miners will get 6.25BTC(halving in every 4 years) and in Ethereum, they will get 2 ETH.