That is correct. These strings are stored in a portion of the flash that is not touched during firmware update.
Thanks for your confirmation. It is a same behavior as we expected. Thank you.
I would also add that, if you use Intel Integrator Toolkit (ITK) to import strings/values (for the Manufacturer, Product, Version, Type, etc. fields in the SMBIOS Chassis and/or System data structures) or a custom logo (for the BIOS Splash Screen), they are also stored in this special region of the flash and thus are not affected by firmware (BIOS) update operations. All data in this region of the flash is encrypted and protected against runtime alteration so that only the BIOS can make updates to it. The update process is secured such that the updater requires both physical access to the machine and password-level access to the BIOS in order to complete it.
Thanks for your input.
ITK is too much at the moment but I will remember the ITK.
Thanks once again for your support.