What is a key feature of Immutable Data?

A key feature of immutable data is that once it is created, it cannot be altered or deleted. This characteristic is fundamental to many systems that rely on ensuring the integrity and reliability of stored information. Immutable data structures are typically used in blockchain technology and version control systems to preserve a permanent and verifiable history of data without allowing modifications.

When data is immutable, it is often encrypted as well, adding a layer of security, making it not just hard to modify but also difficult to delete. This ensures that information remains intact over time, which is essential for auditing and compliance purposes. This persistent nature of immutable data contributes to its utility in various applications, especially those requiring high levels of data integrity and security.

Other options reflect attributes that contradict the fundamental definition of immutable data, focusing instead on modifiable or easily deletable characteristics which do not apply. Thus, the correct answer captures the essence of what makes immutable data a critical feature in many technological solutions.