What does integrity ensure regarding data?

• A. Data can be easily edited and altered
• B. Data cannot be accessed without an encryption key
• C. Data cannot be edited or altered without the encryption key
• D. Data is stored in a secure location only

Answer: (C)

Integrity in the context of data security refers to the accuracy and consistency of data over its entire lifecycle. When we talk about integrity, we are primarily concerned with ensuring that data remains unaltered and authentic, which is a fundamental requirement for data reliability.

The correct answer emphasizes that data cannot be edited or altered without the encryption key. This ensures that only authorized individuals who possess the encryption key can modify the data, which helps to protect it from unauthorized changes. If data integrity is maintained, any unauthorized attempt to change the information would be prevented, whereas legitimate users with the necessary keys can modify it when needed.

This concept is crucial for maintaining trust in the data's accuracy, especially when it is used in critical applications or decision-making processes. By requiring an encryption key for any alterations, the security of data integrity is upheld, safeguarding it from manipulation and ensuring that users can rely on the correctness of the information they access.