What is Blockchain?

Blockchain is the foundational technology behind cryptocurrencies—a distributed database maintaining a continuously growing list of records (blocks) linked using cryptography.

Once recorded, data in blocks cannot be altered retroactively without changing all subsequent blocks, making the system highly resistant to modification.

Key features

• Immutable: Once recorded, data cannot be changed
• Distributed: Copies exist across thousands of computers
• Consensus-based: Network participants agree on transaction validity
• Transparent: Anyone can verify transactions

Blockchain technology extends beyond cryptocurrencies to applications in supply chain, healthcare, voting systems, and more.