CompTIA CySA+ (CS0-002) — Question 256

A computer hardware manufacturer is developing a new SoC that will be used by mobile devices. The SoC should not allow users or the process to downgrade from a newer firmware to an older one. Which of the following can the hardware manufacturer implement to prevent firmware downgrades?

Answer options

• A. Encryption
• B. eFuse
• C. Secure Enclave
• D. Trusted execution

Correct answer: B

Explanation

The correct answer is B, eFuse, as it is specifically designed to prevent firmware downgrades by permanently disabling certain functionalities once the firmware is updated. The other options, while valuable for security, do not specifically address the issue of preventing firmware downgrades.