Blockchain
Web3 Infrastructure • Tools • Interfaces
decentralized digital ledger technology
A blockchain is a decentralized, distributed digital ledger that records transactions across a network of computers in a secure, transparent, and tamper-resistant way. Each set of transactions is grouped into a block, which is cryptographically linked to the previous one, forming a chain of blocks. This structure ensures data integrity and eliminates the need for a central authority.
Use Case: A user sends cryptocurrency to another wallet address. The transaction is verified by network nodes, added to a new block, and permanently recorded on the blockchain—creating an immutable record that anyone can verify without needing to trust a bank or payment processor.
Key Concepts:
- Blockchain Ledger — The distributed database that stores all transaction records across the network.
- Block Verification — The process by which network nodes validate and confirm new blocks.
- Consensus Mechanism — The protocol that enables network participants to agree on the blockchain’s state.
- Cryptographic Hash — The mathematical function that links blocks together securely.
Summary: Blockchain technology provides the foundational infrastructure for cryptocurrencies, smart contracts, and decentralized applications. By distributing trust across a network rather than centralizing it in institutions, blockchain enables transparent, secure, and censorship-resistant digital systems.