Why Is Blockchain Booming? A Beginner’s Guide to Its Core Principles

Blockchain has become a hot topic; after Kodak showcased a lazy mining machine and blockchain platform at CES, its stock surged 116%.

Blockchain (distributed database) was first widely used in Bitcoin. It maintains a continuous record of transactions, where each piece of data is called a block . Each block can contain multiple transactions and links to the previous block’s hash, forming a chain .

Creating a block requires complex cryptographic calculations, known as mining . The participants who generate blocks are called miners , and the machines they use are mining rigs . Once a block is successfully generated, it cannot be modified.

Because it is a distributed database, blockchain has a decentralized nature: data is stored across many nodes, and no single node can claim a block as valid without majority verification. Each node stores all blocks (or, in newer designs, a subset) and helps verify block validity. Any tampering would break block integrity, which is extremely unlikely.

In a Bitcoin transaction, A creates an address for B, broadcasts a transaction, and the network selects multiple nodes to verify it. When over 50% of nodes confirm the block’s validity, the new block is written to the shared ledger, which is replicated across all nodes. The ledger is fully distributed, decentralized, transparent, immutable, and supports anonymous transactions.

The five key characteristics of blockchain technology are:

Completely open technology.

Decentralized distributed architecture.

All nodes operate anonymously while jointly verifying the entire ledger.

Any attempt to tamper with the ledger requires an extremely high cost.

Fully automated conflict resolution mechanisms.