Which security concept involves device bootloader validation before the device boots?

Which security concept involves device bootloader validation before the device boots?

• A. Bootloader Security
• B. Device Hardening
• C. End of Life (EOL)
• D. Sideloading

Answer: (A)

Protecting the boot process by validating the bootloader before the device boots ensures a trusted start for the system. At power-up, the bootloader’s digital signature is checked against a trusted key; if it’s valid, the device proceeds to load the next stage, but if it isn’t, startup is blocked. This establishes a trusted chain of trust from the very first code that runs and prevents tampering with the bootloader or early firmware. That’s why bootloader security is the best description for this concept. The other options don’t fit as specifically: device hardening covers security practices across the device, End of Life refers to support and updates lifecycle, and sideloading is about installing software from unofficial sources rather than securing the boot process.