Blockchain is a distributed ledger technology that maintains a continuously growing list of records (blocks) linked and secured using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data.
How it works:
Transactions are grouped into blocks
Each block is cryptographically linked to the previous block
The chain is distributed across multiple nodes in a network
Consensus mechanisms ensure all nodes agree on the state
Once added, blocks are extremely difficult to alter
Example: Think of it like a digital ledger book where each page (block) references the previous page's unique fingerprint (hash), making it impossible to tear out or alter pages without detection.
Rewriting in plainer words…
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