What is Blockchain
Distributed ledger technology
Blockchain — a distributed database storing information as a chain of blocks, where each block contains a cryptographic hash of the previous one.
Key Characteristics
- Decentralization — no single point of control
- Immutability — data cannot be changed retroactively
- Transparency — all transactions are public
- Consensus — network state agreement
- Smart Contracts — automatic condition execution
Blockchain Types
- Public — Bitcoin, Ethereum (open to everyone)
- Private — enterprise solutions
- Consortium — managed by organization groups
- Hybrid — combination of public and private
Business Applications
- Finance — payments, transfers, DeFi
- Logistics — supply chain tracking
- Real Estate — property registries
- Healthcare — medical records
- Identity — digital passports