Program update method and server

A server which operates for program update in a system including an LSI device, the server executing:

• a first step of receiving from the system an ID of the LSI device and an application ID which is identification information of an update object program;
• a second step of referring a first table which indicates correspondences between application IDs and LSI IDs to determine whether or not the update object program is transmitted to the system;
• and
• if it is determined at the second step that the update object program is transmitted to the system, a third step of transmitting to the system a common key-encrypted program generated by encrypting the update object program with a common key and common key information from which the common key is derived.