Which boot method enhances security at startup and can utilize TPM for storing encryption keys?

Secure boot is a boot method designed to enhance security during the startup process of a system. It specifically works by ensuring that only trusted software is loaded during the boot sequence. This means that the system checks the integrity and authenticity of the operating system as well as firmware components to prevent malicious code from executing before the operating system has had a chance to start.

A crucial part of secure boot is its ability to work with the Trusted Platform Module (TPM). The TPM can store cryptographic keys, which can be used to validate the boot components, ensuring that they have not been altered or compromised. By relying on the TPM, secure boot can significantly enhance the security of the boot process, as it prevents unauthorized software from being loaded, thus reducing the risk of bootkit and rootkit attacks.

This integration of secure boot and TPM reinforces the system's trustworthiness from the moment it powers on, making secure boot the correct answer in the context of the question regarding boot methods that enhance security at startup and can utilize TPM for key storage.