What is the primary purpose of audit trails?

What is the primary purpose of audit trails?

• A. Prevent alteration
• B. Increase storage size
• C. Improve user interface
• D. Enable external sharing

Answer: (A)

Audit trails provide a chronological record of system actions, showing who did what, when, and from where. Their primary purpose is to preserve data integrity by making changes visible and attributable, so unauthorized alterations can be detected and traced. This helps with accountability and enables effective investigation and response to security incidents. In PCI contexts, logs support monitoring and verification of access to cardholder data, reinforcing the ability to detect tampering and ensure compliance. The other options miss the point: increasing storage size is not the objective of audit trails (it's a byproduct), improving the user interface is unrelated to security logging, and enabling external sharing would weaken security rather than protect it.

Audit trails provide a chronological record of system actions, showing who did what, when, and from where. Their primary purpose is to preserve data integrity by making changes visible and attributable, so unauthorized alterations can be detected and traced. This helps with accountability and enables effective investigation and response to security incidents. In PCI contexts, logs support monitoring and verification of access to cardholder data, reinforcing the ability to detect tampering and ensure compliance. The other options miss the point: increasing storage size is not the objective of audit trails (it's a byproduct), improving the user interface is unrelated to security logging, and enabling external sharing would weaken security rather than protect it.