What Is Blockchain

Learn about blockchain technology and take your knowledge of crypto to the next level.

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8min

Dec 24, 2024

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Welcome to the Freedx Knowledge Base! Whether you’ve heard about blockchain or you're ready to dive in, we’re here to make it simple and easy to understand. Let’s uncover why this revolutionary technology is making waves in cryptocurrency and beyond.

1. Understanding Blockchain

Blockchain technology is a type of secure database. But unlike regular databases controlled by one company or person, blockchain is decentralized—it’s shared across a global network of computers (or "nodes").

Think of a digital notebook (or "ledger”) that’s available to everyone but impossible to alter without a trace. Every time someone writes something new (like a transaction) it’s locked in permanently and can’t be erased or edited. This makes blockchain:

  • Transparent: Everyone can see the data in real time at all times.

  • Secure: It uses advanced cryptography to protect the information.

  • Trustworthy: Because no single person or organization controls it, tampering is nearly impossible.

  • Immutable: Once a transaction is recorded, it cannot be changed (or if it is, it must be agreed upon by at least 51% of nodes).

Blockchains maintain consensus among a network of distributed computers using specialized mechanisms, allowing them to remove the need for centralized oversight that is standard in traditional databases. This fundamental characteristic is what makes blockchains decentralized.

Blockchain protocols are programmed to automatically issue and allocate financial incentives to participants who follow the rules and penalize those who don’t. This built-in system of rewards and deterrents enables blockchains to function autonomously without requiring human intervention.

2. Why Blockchain Matters

Blockchain is changing how we trust, trade, and share information in the digital world. Here’s why blockchain technology is a game-changer:

  • Transparency: Every transaction is recorded for all network participants to see. Since data can’t be altered, users know they’re working with accurate, tamper-proof information.

  • Security: Blockchain uses advanced encryption to protect data, reducing risks of fraud and hacking.

  • Decentralization: By removing central authorities, blockchain gives power back to users and reduces dependency on middlemen.

  • Diverse Applications: From cryptocurrencies to supply chain tracking, blockchain is already changing industries like finance, healthcare, and more.

3. Types of Blockchains

Every blockchain relies on a network of computers, but they differ in what they can be used for and how they function. There are four main types of blockchains:


  1. Public blockchain: also called a permissionless blockchain, this is the most accessible type of blockchain with a decentralized digital ledger where anyone can transact. On a public blockchain, all nodes maintain a copy of the record, which means the entire ledger can be restored from a single node in the event of 99% of the network failing. This eliminates any single point of failure.
  2. Private blockchain: also called a permissioned blockchain, it is operated by a single entity or organization, which makes it somewhat centralized. This type of blockchain is preferred by enterprises for applications and specific use cases.
  3. Hybrid blockchain: combining elements of public and private blockchains where certain parts of the blockchain are public while others are private.
  4. Consortium blockchain: a type of private blockchain a group of organizations share and collaborate on to validate transactions and maintain.

4. How Blockchain Works: Step-by-Step

Here’s a simplified look at how blockchain operates:

What is a block?

A block is a digital container that holds data, like transactions or records. Think of it as a page in a book. Each block is a page, and once written, it can’t be edited or removed.

  • Transaction Initiation: Someone starts a transaction, such as sending cryptocurrency.

  • Verification: A network of computers (or “nodes”) performs checks to ensure the transaction is valid—such as confirming the sender has enough funds and isn’t trying to spend the same amount twice.

  • Block Creation: Once the transaction is confirmed, it is added with other transactions to a new block.

  • Linking Blocks: Every block has its own unique number (a hash) and is securely linked to the block before it, creating a "chain" hence the name blockchain.

  • Finalization: The block is then added to the chain, and the transaction becomes a permanent, unchangeable record.

5. Key Features of Blockchain

There are several important characteristics that define blockchain as the revolutionary technology it is. The decentralized ledger is:

  • Decentralized: Instead of one central authority controlling the data, blockchain is managed by a network of participants, making it democratic and resilient.

  • Immutable: Once data is added to the blockchain, it can’t be altered or deleted. This ensures reliable record-keeping.

  • Transparent: All participants can view the transaction history, fostering trust.

  • Secure: Cryptographic techniques and a distributed network make blockchain resistant to tampering and fraud.

Freedx leverages these features to build a secure and transparent platform for buying, selling and trading cryptocurrencies. These inherent qualities of blockchains underpin the basis of a safe and transparent trading environment for any type of user – regardless of their knowledge level of the technology.

6. Common Uses of Blockchain

Blockchain isn’t just for cryptocurrency! Their secure and permanent nature makes them well-suited for many diverse applications.

Different industries and countries have been quicker to leverage blockchain technology to improve existing infrastructure, platforms and models, but we're already seeing their effects in:

  • Finance: Secure money transfers, automated agreements (smart contracts), and transparent records.

  • Supply Chain: Tracking goods to ensure authenticity and transparency from producer to consumer.

  • Healthcare: Managing patient records securely while enabling easy, authorized access.

  • Voting: Creating tamper-proof voting systems to ensure fair elections.

At Freedx, we leverage blockchain to transform trading and make crypto transactions simple and secure.

Have more questions? Check out our FAQ section or contact our support team!

7. Frequently Asked Questions

Q: Is blockchain secure?

A: Yes, blockchain is highly secure. Changing a blockchain would require overwhelming the network, which is practically impossible.

Q: What’s the difference between blockchain and Bitcoin?

A: Blockchain is the technology that powers cryptocurrencies like Bitcoin, but it’s not limited to just cryptocurrencies. It can be used for many other applications across diverse industries and sectors.

Q: Why is blockchain considered trustworthy?

A: Its decentralized and tamper-proof nature means that once data is added, it remains reliable and verifiable.

Q: What is a consensus mechanism in blockchain?

A: A consensus mechanism is a standardized way for the nodes in blockchain networks to agree on the validity of transactions before they are added to the blockchain. This ensures there is agreement among nodes on the state of the ledger at all times.

8. Next Steps In Your Blockchain Journey

Now that you know the basics of blockchain, it’s time to take the next step. Explore our resources for deeper insights or stay tuned for our video series for more visual explanations.

Ready to experience blockchain in action? Register with FreedX today to learn more about how blockchain can shape your financial future - one block at a time!

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