Immutable

Immutable refers to the characteristic of blockchain data that ensures once a transaction is confirmed, it cannot be changed or deleted. This permanence is achieved through cryptographic hashing and decentralised consensus. Immutability guarantees trust and transparency, as records remain tamper-proof and auditable. It is crucial for applications such as financial ledgers, legal contracts, and digital identity. While errors cannot be corrected, new transactions can be added to amend past entries. This feature enhances security and accountability in both public and private blockchain environments.