| 摘要 |
The present invention consists of a method of managing an electronic microcontroller system, the microcontroller system comprising two processors (CPU1, CPU2) with a first processor (CPU1) intended for the execution of a nonsecure application (Appli1) exhibiting a nonguaranteed level of functional security and integrity, and a second processor (CPU2) dedicated to the execution of a secure application (Appli2) implementing code and data, and involving a guaranteed level of functional security and integrity, said secure application (Appli2) being able to implement a security function; means of access (CT) to a shared memory space (MEM). According to the invention, the first processor (CPU1) comprises a unit for managing the memory (MMU1) configured in such a way that it implements a write access control, so as to manage write access to the shared memory space (MEM), that is not modifiable when the secure application (Appli2) implements its security function. |
