Immutable Ledger

Blockchain technology utilizes cryptographic techniques to create an immutable and tamper-resistant ledger. Each block in the blockchain contains a cryptographic hash of the previous block, creating a chain of blocks linked together. Any attempt to alter the data in a block would require changing all subsequent blocks in the chain, which is computationally infeasible due to the distributed nature of the network and the consensus mechanism. This ensures the integrity and immutability of the transaction history stored on the blockchain.