Secure Boot for high performance computing software, as defined in the UEFI specification, provides an industry standard defense against potential malware attacks. Without Secure Boot, malware can attack systems during pre-boot by targeting the system-embedded firmware during the interval between BIOS initiation and operating system load. Malware inserted at this point compromises the security of the operating system, no matter how secure. Secure Boot protects the system by preventing the insertion of malware during the pre-boot process. This technical white paper introduces Secure Boot technology and explains what it is, how it works and how to use it on UEFI-based HPE servers running Linux®.