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Topic 1/3

Basics of Blockchain Technology

2m Read

Blockchain technology underpins the functionality of cryptocurrencies, providing a secure and transparent framework for transactions. This foundational lesson introduces the basics of blockchain technology, a crucial component for anyone venturing into the cryptocurrency space.

What is Blockchain?

At its core, blockchain is a distributed ledger technology (DLT) that records transactions across multiple computers in a manner that ensures security, transparency, and immutability. It's a chain of blocks, where each block contains a number of transactions.

How Does Blockchain Work?

  1. Transaction Initiation: When a transaction is made, it's broadcast to a network of computers (nodes).
  2. Block Formation: Transactions are grouped together into a block by miners or validators.
  3. Verification Process: Nodes verify the transactions within a block through consensus mechanisms, such as proof of work (PoW) or proof of stake (PoS).
  4. Adding to the Chain: Once verified, the block is added to the blockchain, providing a permanent and tamper-proof record of transactions.

Key Features of Blockchain

  • Decentralization: Blockchain operates on a decentralized network, removing the need for a central authority and reducing central points of failure.
  • Transparency: Every participant in the network can view the transactions stored in the blockchain, ensuring transparency.
  • Security: Transactions on a blockchain are secured through cryptographic techniques, making them tamper-resistant.
  • Immutability: Once a transaction is recorded on the blockchain, it cannot be altered, ensuring the integrity of the transaction history.

Applications Beyond Cryptocurrencies

Blockchain's applications extend beyond supporting cryptocurrencies. It enables smart contracts, decentralized applications (DApps), and solutions for sectors such as supply chain management, healthcare, and finance, demonstrating its potential to transform various industries.

Facing the Challenges

Blockchain technology is not without its challenges, including scalability, energy consumption (notably with PoW), and regulatory issues. Overcoming these challenges is essential for the broader adoption and advancement of blockchain technologies.


Blockchain technology is the backbone of cryptocurrencies, offering a way to conduct secure, transparent, and immutable transactions. Its impact, however, reaches far beyond, with the potential to revolutionize numerous industries by providing a trustworthy and decentralized framework for digital interactions.

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