Which of the following security mechanisms provides the BEST protection of data when a computer is stolen?

Secret key encryption, also known as symmetric encryption, involves a single key for both encryption

and decryption. This method provides the best protection for data on a computer that is stolen

because it renders the data unreadable without the key. Even if the thief has access to the physical

hardware, without the secret key, the data remains secure and inaccessible.

Reference: ISACA’s resources emphasize the importance of encryption in protecting information

assets. Encryption is a critical control for ensuring the confidentiality and integrity of data, especially

for devices that may be lost or stolen. The use of secret key encryption is a widely recommended

practice for safeguarding sensitive data on mobile devices and laptops as part of an organization’s

data protection strategy123.