Blockchain is a distributed ledger technology that ensures data security, transparency, and immutability.

	1.	Decentralization: Data is stored on multiple nodes, making the system resilient to attacks and failures.
	2.	Transparency and Anonymity: Transactions are public, but users remain anonymous.
	3.	Immutability: Data cannot be altered without the majority’s consent.
	4.	Security: Cryptographic methods protect data from hacking.
	5.	Consensus Algorithms: New blocks are validated using Proof of Work or Proof of Stake.
	6.	Smart Contracts: Automatic execution of contract conditions.
	7.	Scalability: Addressed with methods like sharding.