METHOD FOR A SECURE BOOT-UP PROCESS OF AN ELECTRONIC SYSTEM

• Main Authors: MATSCHNIG, Martin, GHAMESHLU, Majid, TAUCHER, Herbert
• Format: Patent
• Language: English; French; German
• Published: 16.09.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a method for a secure boot-up process of an electronic system (S), which consists at least of a master unit (M1, M2, to Mn), a bus system (BS), a working memory unit (AS), an internal memory unit (iS), at least one interface (IF1, IF2), and slave units (S1 to Sn). The boot-up process of the electronic system is carried out (2) in multiple stages. Boot-up programs are loaded from the internal memory unit (iS) and from a first external memory unit (eS), and then an application is loaded into the working memory unit (AS) from a second external memory unit (eMS). A bus monitoring unit (BE1, BE2 to BEn) is connected (1) to the at least one master unit (M1, M2 to Mn). Access data is monitored by said bus monitoring unit (BE1, BE2 to BEn) during the boot-up process and transmitted (2) to a signature generating unit (SB). An actual signature is ascertained (2) using the access data. A target signature is written (3) into a register unit (RE) by the application loaded in the third stage of the boot-up process, and the current signature ascertained by the signature generating unit (SB) is compared (4) with the target signature. The method according to the invention provides a secure boot-up process in a simple manner, wherein the boot-up process prevents the electronic system from being manipulated without detailed knowledge of the hardware of the electronic system (S) and prevents a use of the electronic system (S) for an unintended purpose.