Blockchain

What is Blockchain?

Blockchain is a decentralized, distributed digital ledger that records transactions across many computers. Each "block" contains a timestamped list of transactions, and once a block is added to the chain, it cannot be altered, making it very secure and transparent.

Why is it important?

Blockchain is the technology behind cryptocurrencies like Bitcoin, but its uses extend to secure record-keeping for supply chains, voting systems, and digital identity. It offers high levels of trust and security because no single person or group controls it, and all participants can verify the records.

Examples & Applications

• Cryptocurrencies: Like Bitcoin and Ethereum, which use blockchain to record all transactions.
• Supply Chain Tracking: Companies use blockchain to track products from where they are made to the store, ensuring authenticity.
• Secure Digital Voting: Blockchain can be used to create voting systems that are transparent and tamper-proof.

Related Concepts

• Cryptocurrency: Digital money designed to work as a medium of exchange using cryptography to secure transactions.
• Decentralization: The principle that no single entity controls the network; power is distributed among many participants.
• Distributed Ledger: A database that is shared and synchronized across multiple sites, countries, or institutions.