Blockchain Tutorial

Blockchain technology in simple words is a digital database where information or data is stored in blocks that are linked together to form a chain. This Blockchain Tutorial covers all basic to advanced topics of blockchain like cryptography, Blockchain Algorithms, Blockchain Architecture, Blockchain Security, Smart Contracts, etc.

What is Blockchain?

A Blockchain is a digital ledger of transactions that is secure, immutable, and decentralized. It consists of a chain of blocks and each block contains a secure group of transactions of money, bitcoins, contracts, property, etc. without any need for third-party middle-man such as central authorities, banks, government, etc. Transactions are verified by a network of computers. Once a block of information is created in the chain, it can’t be changed or deleted. This makes the blockchain very secure and trustworthy. It is a software protocol, it never runs without the internet.

A Blockchain is a chain of blocks that contains information about transactions. On completion of a transaction, it will go to the blockchain’s permanent database. It is mainly used for secure transactions without any third-party involvement in between. To visualize blocks, transactions, and blockchain network metrics, you can use blockchain explorer.

Why Do We Use Blockchain?

Blockchain is a distributed digital ledger of transactions. It changes the whole concept of the transaction now we don’t have any need for centralized authorities to verify our transactions, blockchain makes it decentralized and secure. The security is maintained by cryptographic processes performed by p2p users, through the process called Data mining Here are some important features given below:

• Secure
• Transparent
• Tamper-proof
• Peer-to-peer transaction

Recent Articles on Blockchain

• Introduction
• Cryptography
• Consensus Algorithms
• Blockchain Architecture
• Cryptocurrency
• Smart Contracts and DApps

• Blockchain Security
• Blockchain Applications
• Blockchain Implementation
• Miscellaneous
• Interview Questions

Introduction to Blockchain Technology

• Introduction to Blockchain Technology
• History of Blockchain
• Features of Blockchain
• Important Blockchain Terminologies
• Different Versions of Blockchain 
• Types of Blockchain
• Public Blockchain
• Private Blockchain
• Hybrid Blockchain
• Consortium Blockchain
• Applications of Blockchain
• Advantages and Disadvantages of Blockchain 
• Benefits of Blockchain Technology
• How Does the Blockchain Work?
• Need of Blockchain
• Peer-to-Peer Network
• What is Decentralization?
• What is Ledger?
• What is Blockchain Distributed Ledger?
• Difference between Centralized and Distributed Ledgers
• Difference between Public and Private Ledgers

Cryptography

• Cryptography and its Types
• Cryptography in Blockchain
• Blockchain Hash Function
• Blockchain – Block hashing
• How Block Hashes Work in Blockchain
• What is Digital Signature?
• Blockchain – Public Key Cryptography
• Blockchain – Private Key Cryptography
• Blockchain Merkle Trees
• What is Cryptographic Primitive in Blockchain?
• Blockchain – Elliptic Curve Cryptography
• How to Create a Public/Private Key Pair?
• Blockchain – Encrypt & Decrypt Files With Password Using OpenSSL
• Blockchain – Elliptic Curve Digital Signature Algorithm (ECDSA)
• Blockchain Resolving Conflicts
• Applications of Homomorphic Encryption in Blockchain

Consensus Algorithms

• Consensus Algorithms in Blockchain
• Blockchain Proof Of Work
• Proof of Work Consensus algorithm
• Proof of Burn Consensus Algorithm in Blockchain
• Proof of Stake (PoS) in Blockchain
• Byzantine Generals Problem in Blockchain
• Cryptographic Consensus Mechanisms in Blockchain
• Delegated Proof Of Stake (DPoS)
• practical Byzantine Fault Tolerance(pBFT)

Blockchain Architecture

• Blockchain Structure
• Genesis Block in Blockchain
• Candidate Block in Blockchain
• Actors Involved in Blockchain Solution
• Blockchain Transaction Life-cycle
• Blockchain Forks
• Blockchain and Block Header
• Components of Blockchain Network
• Blockchain Incentives to Miners
• Core Component of Blockchain
• Blockchain Protocols and Their Working
• Blockchain – Resolving Conflicts
• What is Blockchain Authentication?

Blockchain and Cryptocurrency

• What is Blockchain Cryptocurrency?
• Cryptocurrencies Benefits
• How are Cryptocurrencies created
• What is a Cryptographic Token
• Non-Fungible Tokens (NFTs)
• What is Cryptoeconomics?
• What is an ICO?
• Generalized Proof-of-Stake Mining in Cryptocurrencies
• Blockchain – Electronic Cash
• What is Blockchain Wallet and How does it work

Smart Contracts and Decentralized Applications (DApps)

• What is Ethereum
• Components of the Ethereum Network
• Difference between Ethereum and Bitcoin
• What is Ether
• Ethereum Accounts
• Nodes and Clients in Ethereum
• What is Ethereum Virtual Machine
• Ethereum – Gas and Fees
• What is a Smart Contract
• How to Test a Smart Contract for Ethereum?
• How to Simply Deploy a Smart Contract on Ethereum
• Hello World – Smart Contract in Remix-IDE
• Decentralized Apps (dApps) in Blockchain
• What is an Ethereum API
• Pros and Cons of Dapps
• What is a Dao?

Blockchain Security

• Blockchain and Data Privacy
• Blockchain and KYC
• Role of Blockchain in Cybersecurity
• Blockchain to Secure IoT Data

Blockchain Applications

• Applications of Blockchain in Data Management
• Top Applications of Blockchain in the Real World
• Benefits and Applications of Blockchain in Cloud Computing
• Integration of Artificial Intelligence and BlockChain
• How Blockchain Can Change the Future of Banking?
• Blockchain – Into the Future
• Blockchain in Genomics
• Integration of Blockchain and AI
• Use Cases of BlockChain in different fields
• Role of Blockchain in Sustainable Development
• Applications and Uses of Blockchain
• Benefits of Blockchain in Healthcare
• Decentralized Voting System Using Blockchain

Blockchain Implementation

• Create a simple Blockchain using Python
• Implementation of Blockchain in Java
• Build a To-do List Web Application Powered by Blockchain
• Flutter and Blockchain – Hello World Dapp
• Blockchain Gaming: Part 1 (Introduction)
• How to Use GANACHE Truffle Suite to Deploy a Smart Contract in Solidity (Blockchain)?
• How to Use MetaMask to Deploy a Smart Contract in Solidity (Blockchain)?
• Build an Authentication Using the Blockchain

Miscellaneous

• Public Blockchain vs Private Blockchain
• Blockchain vs Database
• Proof of Work (PoW) vs Proof of Stake (PoS) 
• DAG vs Blockchain
• Hot Wallets vs Cold Wallets in Blockchain
• Bitcoin vs Cryptocurrency
• Full Payment Verification vs Simple Payment Verification in Blockchain
• Bitcoin vs Blockchain
• Hyperledger vs Ethereum
• Blockchain vs Hashgraph
• Quorum Blockchain
• What is EOS Blockchain?
• DAO(Decentralized Autonomous Organization) in Blockchain
• What’s the connection between Java and Blockchain?
• Top 10 Programming Languages for Blockchain Development
• How does Blockchain support Crowdfunding?
• Blockchain Interoperability
• Why Blockchain is Impenetrable?
• Different job roles in Blockchain Technology
• Demur-rage currencies in Blockchain
• Blockchain of Things (BoT)
• What is Blockchain Ecosystem?
• How to Share Files in IPFS Blockchain?
• What is the CAP Theorem in blockchain

Interview Questions

• Top 50 Blockchain Interview Questions and Answers
• 15 Commonly Asked Blockchain Interview Questions & Answers

FAQs on Blockchain Technology

1. What programming languages are used for Blockchain?

We can use several programming languages to make our Blockchain-based projects :

• Solidity
• C#
• C++
• SQL
• Ruby
• Java
• JavaScript
• Python
• GoLang

Solidity is the majority-used programming language for blockchain-based projects. 

2. How Blockchain works step by step?

In general, many nodes within the same blockchain implementation are required to perform algorithms to evaluate, validate, and process the history of the blockchain block whenever a new blockchain transaction is added to the blockchain. The fresh block of blockchain transaction is accepted into the ledger and the new block containing data is added to the blockchain if the majority of nodes confirm the authenticity of the block’s history and signature.

3. What is a Blockchain Platform?

A blockchain platform allows developers and users to create transactions in the existing blockchain database. For example, Ethereum has a native cryptocurrency called Ether (ETH). But the Ethereum blockchain allows users to create smart contracts and programmable tokens used in initial coin offerings (ICOs), and non-fungible tokens (NFTs). These are built upon the Ethereum infrastructure and secure by Ethereum network algorithms and system

4. What Is Cryptocurrency?

Cryptocurrencies are often traded on decentralized exchanges and can also be used to purchase goods and services. It is a digital or virtual currency that uses cryptography to encrypt its transactions and regulate the creation of new nodes or blocks.

5. What is a Blockchain Wallet?

Blockchain wallets are like bank accounts in that they allow users to easily transfer money between their various accounts. But where banks rely on centralized systems or government rules and protocols to hold customers’ money, blockchain wallets use decentralized technology to manage transactions. It is a digital wallet that allows us to store, send, and receive cryptocurrencies like Bitcoin, Ethereum, Dogecoin, and Tether.