All terms
Hardware & Systems
Secure Boot
A startup check that only lets digitally signed, trusted system software run on a server.
Definition
Secure Boot is a security control that allows only digitally signed and trusted bootloaders, kernels, and critical system components to run during a server's startup. By verifying signatures before code executes, it blocks tampered or unauthorized firmware from loading. In AI training and inference clusters it is a foundational defense against supply-chain attacks and unauthorized firmware modifications.