What is Blockchain and Ethereum?

Demystifying Blockchain and Ethereum: Empowering the Future of Decentralization. Learn more about what those tecnologies can do.


In the realm of technology, blockchain and Ethereum have garnered more attention and potential. Often associated with cryptocurrencies like Bitcoin, these innovations have revolutionized how we perceive data security, transparency, and decentralized applications. In this article, we will delve into the world of blockchain and Ethereum, exploring their fundamental concepts, features, and real-world applications.

What is Blockchain?

A blockchain is a distributed and decentralized digital ledger that records transactions across multiple computers or nodes. Each transaction, known as a block, is added to a chain of previous blocks, forming an immutable record of all past transactions. The distinguishing features of blockchain include transparency, security, and the elimination of intermediaries, making it ideal for various industries beyond finance.

Did you find it difficult to understand? It’s actually quite simple! This system is similar to how banks operate. Let’s say you use a credit card to make a purchase. The transaction information is sent to a network that records all the purchase details. This information can be accessed by the bank, seller, and credit card operator. This is similar to how blockchain works, except that the transaction information is public and personal data and address information are not required.

One significant difference between blockchain and traditional systems is security. In the earlier example, the information can be corrupted by cyber criminals. However, with blockchain, the verification system ensures that the data is immutable and almost impossible to corrupt. The critical components of a blockchain are:

  1. Distributed Consensus: All participants in the network must agree on the validity of transactions, usually achieved through consensus algorithms like Proof of Work (PoW) or Proof of Stake (PoS).
  2. Cryptographic Security: Each block is cryptographically linked to the previous one, creating an unalterable information chain.
  3. Decentralization: Blockchain operates on a peer-to-peer network, eliminating the need for a central authority and enabling a trustless environment.

It’s worth acknowledging that although a reliable network, scammers still can target it. Therefore, it’s essential to understand how to safeguard yourself from these individuals. To assist you, we’ve published a dedicated article in Kanazawa’s “NFT Academy” explaining how to securely operate on the blockchain.

Real-world Applications of Blockchain

Blockchain technology extends beyond cryptocurrencies. Its potential applications include:

  1. Supply Chain Management: Blockchain can provide end-to-end visibility and traceability, ensuring the authenticity and integrity of products.
  2. Healthcare: Secure sharing of medical records, drug traceability, and clinical trial management can be facilitated through blockchain.
  3. Voting Systems: Blockchain can enhance transparency and trust in elections by ensuring tamper-proof voting records.
  4. Smart Contracts: These self-executing contracts automatically enforce predefined terms and conditions, eliminating the need for intermediaries.

Introduction to Ethereum

Ethereum is an open-source blockchain platform founded by Vitalik Buterin. It goes beyond the scope of Bitcoin by allowing developers to create and deploy decentralized applications (DApps) on its platform. Ethereum introduced the concept of smart contracts, programmable agreements that execute automatically when predetermined conditions are met. Simply put, the Ethereum network is similar to BitCoin but more modern and advanced. It allows for circulating smart contracts containing complex files and data and a cryptocurrency called Ethereum or ETH.

Key Features of Ethereum:

  1. Smart Contracts: Ethereum’s primary feature, smart contracts, enables developers to create decentralized applications that operate without the possibility of censorship, fraud, or third-party interference.
  2. Ether (ETH): Ethereum has its native cryptocurrency called Ether, which is used to power the network and incentivize participants to validate transactions.
  3. Decentralized Applications (DApps): Developers can build DApps on the Ethereum platform, unlocking various functionalities and possibilities for innovation across industries.
  4. Ethereum Virtual Machine (EVM): EVM is a runtime environment that executes smart contracts, ensuring compatibility across different devices and operating systems.

Real-world Applications of Ethereum:

  1. Decentralized Finance (DeFi): Ethereum has become a hub for DeFi applications, allowing users to access lending, borrowing, and trading services without intermediaries.
  2. Non-Fungible Tokens (NFTs): Ethereum’s blockchain enables the creation and trading of unique digital assets, such as collectibles, art, and virtual real estate.
  3. Decentralized Autonomous Organizations (DAOs): Ethereum provides the foundation for DAOs, enabling decentralized governance and decision-making.


Blockchain and Ethereum represent a paradigm shift in envisioning trust, security, and decentralized applications. With its immutability and transparency, blockchain technology offers immense potential to transform various sectors beyond finance. Ethereum, as a blockchain platform, empowers developers to build decentralized applications and revolutionize industries through smart contracts. As these technologies continue to evolve, we can expect even more groundbreaking applications that reshape our digital landscape and empower individuals worldwide.

After learning about NFTs, Blockchain, and Ethereum, you may be curious about where to find these technologies. They can be found in various places, but at Kanazawa, we utilize a unique format know as a “Marketplace.” Are you interested in learning more about it?