How Does Secure Boot Work?
As shown in the diagram below “Firmware initialization” is the first process when the system is powered on. Now “Secure Boot verification” verifies the digital signatures of each boot component against the public keys of the embedded system which is provided by the vendors while manufacturing. If the keys are valid then it moves to the next step i.e. embedded public keys and if it is not valid it again goes to the firmware initialization. The embedded public keys are provided by the vendor or hardware manufacturer and all the sets of keys are stored in the firmware. When one component’s signature is valid it adds the next component in the chain for verification. When all the boot components are verified and valid the firmware loads the operating system kernel into memory. In the secure boot policy, endorsement-enabled and disabled options are included. Protected against malware protects our system from malicious or unauthorized software whose signature is missing or invalid.
What is Secure Boot?
Attackers can hack our systems in many ways, like PCs, laptops, desktops, etc. They take control of our system due to malpractice. Booting is also a technique through which an attacker executes malicious software and enters the system. In this article includes we will see all secure boot in detail.