Blockchain

-


🧱 What Is Blockchain?

Blockchain is like a digital notebook — but instead of being kept in one place, it’s copied and shared across thousands of computers around the world.

🖊️ Imagine This:

You and your friends keep a group ledger (a shared notebook) where every time someone lends or borrows money, you all write it down. But there's a catch:

  • No one is allowed to erase anything.
  • Everyone must agree before a new page is added.

That’s basically what blockchain does — but with data instead of loans.

🧩 Breaking It Down

1. Block

A block is like a page in that notebook. It contains:

  • A list of transactions (e.g., Alice sent Bob 2 Bitcoin)
  • A timestamp
  • A unique ID called a hash
  • The hash of the previous block (linking them together)

2. Chain

Blocks are connected like a chain — each one links to the block before it. That’s why it’s called a blockchain.

Once a block is full of data and added to the chain, it can’t be changed without changing every block after it — which is extremely difficult (on purpose).

💻 Real-World Example:

Think of a Google Doc that:

  • Anyone can view.
  • Everyone must agree before changes are saved.
  • Keeps a history of all edits forever.

Now, imagine that Google doesn’t actually host the doc — it’s automatically saved and backed up across thousands of laptops around the world. Even if some computers go offline, the document is still safe.

That’s a blockchain.

🔐 Why People Like Blockchain:

  • No middleman needed (like a bank or lawyer)
  • Transparent: Anyone can see what happened
  • Secure: It’s super hard to hack or change history
  • Decentralized: No single point of failure

🏦 What Can It Be Used For (Besides Crypto)?

  • Supply chain tracking (e.g., tracing your coffee from farm to cup)
  • Voting systems (to prevent fraud)
  • Digital identity
  • NFTs and digital art ownership
  • Smart contracts (automatic agreements)

Let me know the next term you'd like explained — maybe Bitcoin, Wallet, Smart Contract, Token, or something else?


Next>>

Comments

Post a Comment

Popular posts from this blog

Synopsis - Just Roommates

-
Image
…I padded barefoot into the kitchen for a drink of water, wearing nothing but a pair of panties and my oversized sleep shirt—the kind that practically swallowed me whole. I opened the fridge, grabbed a chilled water bottle, and took a long sip straight from it. That’s when I heard it—the unmistakable sound of someone clearing their throat. Startled, I spun around, my heart leaping into my throat. In my panic, I nearly emptied the entire bottle on the intruder. A male intruder, to be specific. He hissed as the freezing water hit him, but my brain barely registered his discomfort. Because, as ridiculous as it sounds, I was momentarily distracted by how annoyingly gorgeous he was. My thoughts scrambled, and before I could fully process what was happening, I did the only logical thing—I tried to scream. But he was faster. His large hand clamped over my mouth, muffling my voice. I should have been terrified. Instead, my brain chose to notice how good he smelled. Not the time, Le...
Read more

Chapter Four - Just Roommates

-
Peter The last time I saw Leah, I had longer hair, just a patch of beard, and wasn’t as built as I am now. Maybe she’d recognize me if she focused on my eyes—but she wasn’t. Her gaze was elsewhere. "Oh! Isn't that Leah? We were just about to come down to your floor," Maxwell, the bulky CTO, said. Leah still hadn’t spoken. She stood frozen, deep in thought, completely unaware of what was happening around her. "This is Peter O’Brien, the CEO of Cybernetics," Maxwell continued, attempting introductions. "He’ll be in charge of investigating and resolving the cyberattack." If she was listening, she didn’t show it. Her expression remained distant. She had completely spaced out. Maxwell sighed before stepping beside her and giving her a light tap on the shoulder. "Earth to Leah!" he said, shaking his head. She jolted slightly. "Oh! Sorry, I zoned out," she admitted. Then, realizing she should introduce herself, she turned to me. "Hi! ...
Read more

Prologue - Just Roommates

-
  Leah Henderson was petite in every sense of the word. At twenty-four, she was slim, weighing just eighty-three pounds (83 lbs), and stood at five feet three inches (5’3”). She wasn’t as busty as her best friend, Mary Anna, but she wasn’t flat either—her curves were subtle but present. Her eyes were a mesmerizing mix of blue and green, though the exact shade was hard to pin down. Were they bluish-green or greenish-blue? Cyanic or aqua? It depended on the day, but one thing was certain—they leaned more toward blue when she was moody. Large and round, her eyes were easily one of her most striking features. With a heart-shaped face, ever-smiling lips, and a button nose, Leah had a beauty that turned heads. Though she sometimes envied her best friend’s curvier figure, she never felt ashamed of her own body. She wouldn’t flaunt it, but that didn’t stop her from admiring her reflection in the full-length mirror from time to time. Her blonde hair was naturally curly, but for reasons only...
Read more