Meaning
Database designs that prevent the modification or deletion of recorded data entries once they are committed ensure a permanent historical log. This quality of ledger immutability is achieved through cryptographic hashing and distributed consensus mechanisms. It guarantees that the history of transactions remains unaltered, providing a reliable source of truth for audits.
The characteristic remains a fundamental feature of public blockchain networks.
Record Permanence
Security of historical data is preserved because no single entity holds the authority to overwrite previous blocks. Through ledger immutability, the system establishes a chronological chain of transactions that cannot be retroactively manipulated. This permanent record allows founders to prove past states and ownership without relying on a central authority.
It offers a level of trust that traditional databases cannot match.
Technical Constraint
Correcting errors or reversing fraudulent transactions requires the creation of a new transaction rather than editing the past.
System Liability
Inability to delete data presents a risk when illegal or sensitive personal information is written to the database. Because ledger immutability is absolute, complying with privacy laws that mandate the deletion of personal data becomes technically impossible. This conflict can lead to regulatory actions and legal disputes that are difficult to resolve.
It creates a permanent legal risk that the organisation must manage.
