Blockchain Basics: An Introduction to Blockchain Technology | TechTutorialsToday

Blockchain Basics: An Introduction to Blockchain Technology

Understanding Blockchain

Blockchain is one of the revolutionary technologies that has transformed business operations globally. Pioneered by Bitcoin as an underlying tool for cryptocurrency, blockchain technology offers a distributed ledger system to validate and record transactions across computers in a peer-to-peer network.

What is blockchain technology?

Blockchain technology is a decentralized public or private platform that enables secure and transparent peer-to-peer transactions. Each transaction is validated and recorded in a block and the blocks are linked in a chronological order to form a blockchain. This structure makes the information stored on a blockchain resistant to modification, deletion and hacking.

Blockchain: How does it work?

How does blockchain technology work?

For a blockchain to add a new block (transaction), several things must occur:

  1. A transaction must take place.
  2. The transaction must be verified by a network of computers.
  3. The transaction must be stored in a block.
  4. That block must be added to the chain.

Upon successful addition, the transaction becomes unalterable and is displayed throughout the network. Any attempt to alter or delete the recorded transactions is nearly impossible since a hacker or malicious party would need to alter all the previous blocks.

Common Terms in the Blockchain World

Understanding the blockchain implies that you are familiar with its common terms and phrases. Here are some central terminologies:

  • Block: A data structure that stores a list of transactions.
  • Blockchain: A system of recording information that makes it hard or impossible to change, hack, or defraud the system.
  • Distributed Ledger: A database that exists across several locations or among multiple participants.
  • Node: Any computer that connects to the blockchain network.

Real World Applications of Blockchain

What are the applications of blockchain technology?

Blockchain has transformed various sectors with its far-reaching applications:

  • Cryptocurrency: Bitcoin and other cryptocurrencies use Blockchain to record transactions.
  • Finance and Banking: Blockchain technology enables secure, transparent financial transactions and reduces the cost of money transfers.
  • Supply Chain Management: Blockchain enhances traceability, transparency, and security in the supply chain.
  • Healthcare: Patient records can be securely stored and shared using blockchain technology.
  • Voting: Blockchain could be used to create tamper-proof voting systems.

Key technical Concepts in Blockchain

What are the key technical concepts in blockchain?

These are some key concepts to keep in mind:

  • Decentralization: Blockchain isn't controlled by a single authority; it's managed by various nodes in the network.
  • Transparency: All transactions are visible and available to anyone on the block.
  • Hashing: A function that converts an input of letters and numbers into an encrypted output.
  • Mining: It’s a process where transactions are verified and added to the blockchain.

Advantages and Disadvantages of Blockchain

What are the pros and cons of blockchain technology?


  • Transparency: Transaction histories are becoming more transparent through blockchain.
  • Security: Blockchain is relatively secure due to the cryptographic and decentralized protocol.
  • Reduces cost: No third party or clearing houses are needed which reduces cost in the long run.


  • Speed Inefficiency: Bitcoin can process 3.3 to 7 transactions per second while Visa can handle on average 1,700 transactions per second.
  • Data modifications: Once the data has been written to the blockchain, it is extremely difficult to modify or delete it.
  • Energy consumption: The process of extracting (or mining) cryptocurrencies, especially Bitcoin, consumes a lot of energy.

Blockchain technology is an advancement with significant applications and implications. As the world strives for more transparency and security, blockchain is likely to be a leading technology adopted by many industries. However, it is important to understand and consider the challenges that are associated in terms of scalability, privacy, and security of the technology.

This blockchain guide aimed to introduce you to its basics. However, the blockchain world is broad and fascinating. Hence, there’s still a lot more to uncover learning about it.