Blockchain
What Is Blockchain?
Blockchain is a distributed digital ledger technology that records transactions across a network of computers in a secure and transparent manner. Each group of transactions is stored in a “block,” which is linked to previous blocks to form a continuous chain.
Because records are distributed across many computers, blockchain systems are difficult to alter or manipulate.
Why It Matters
Blockchain technology enables secure, transparent, and decentralized record-keeping without requiring a central authority. This innovation has influenced not only cryptocurrencies but also areas such as financial services, supply chains, and digital identity.
Blockchain may improve efficiency and transparency in various industries.
How Blockchain Works
Blockchain systems operate through a decentralized network.
Key features include:
- distributed ledger across multiple computers
- cryptographic security
- transparent transaction history
- consensus mechanisms for validating transactions
Each new block added to the chain must be verified by network participants.
Example
When a cryptocurrency transaction occurs, it is verified by the network and recorded permanently on the blockchain.
Blockchain vs Traditional Databases
- Blockchain distributes records across many computers.
- Traditional databases are typically stored and controlled by a single central authority.
FAQs About Blockchain
Is blockchain the same as cryptocurrency?
No. Blockchain is the underlying technology used by many cryptocurrencies.
Why is blockchain considered secure?
Because altering records requires changing data across the entire network.
Can blockchain be used outside finance?
Yes. It is used in supply chains, healthcare records, and digital identity systems.
Related Terms
