Information processing system and BIOS update method

A basic input output system (BIOS) update method of updating a BIOS of an information processing apparatus including a BIOS storage that stores a program of the BIOS, the BIOS update method comprising:

• a distribution step of, via a server, encapsulating a program of an extended function of the BIOS to which a signature of a user is assigned, assigning a signature of a server manager to an encapsulated capsule file, and providing the encapsulated capsule file to the information processing apparatus;
• and
• a BIOS processing step of, via the information processing apparatus,
• extracting the program of the extended function from the encapsulated capsule file to store the program of the extended function in the BIOS storage in a first case in which validity of the encapsulated capsule file acquired from the server is confirmed based on the signature of the server manager,
• permitting execution of the program of the extended function in a case in which validity of the program of the extended function is confirmed based on a signature certificate of the user and the signature of the user, and
• prohibiting execution of the program of the extended function in a second case in which the validity of the program of the extended function is not confirmed,
• wherein the BIOS storage includes
• a BIOS memory that is a rewritable non-volatile memory, which is not connectable from an operating system (OS) without going through the BIOS, and stores at least a boot program required to start up the OS and management information of the extended function, and
• a BIOS area that is a partial area of a solid state drive (SSD) and is not connectable from the OS without going through the BIOS, and
• in a case in which the validity of the encapsulated capsule file is confirmed, the program of the extended function is extracted from the encapsulated capsule file to store the program of the extended function in the BIOS area.