Abstract: A method for displaying a secure or forgery-proof identity indicator on a screen using a display controller displaying the content of a memory unit of the graphic circuit on the screen, includes: drawing, by a client application, a graphic to be displayed on the screen into a client-specific region of the memory unit of the graphic circuit; drawing an identity indicator belonging to the client application into a memory region outside of the client-specific region; displaying the client-specific region of the memory unit of the graphic circuit on the screen; and simultaneously displaying the identity indicator from the memory region outside of the client-specific region on the screen. For displaying the identity indicator from the memory region outside of the client-specific region, access is only possible from the display controller such that the display of the identity indicator is secure or forgery-proof.

Abstract: A method for memory virtualization in a system including guest virtual, guest physical and host physical address spaces, a guest pagetable for translating addresses of the guest virtual address space into addresses of the guest physical address space, a shadow pagetable for translating addresses of the guest virtual address space into addresses of the host physical address space, and a hypervisor configured for calculating address entries for the shadow pagetable from valid address entries in the guest pagetable, includes managing, by the hypervisor, one or more shadow pagetable(s) by the hypervisor while a guest context is executed by a guest operating system, wherein the number of shadow pagetable(s) is smaller than or equal to the number of guest contexts in a current working set.

Abstract: A method for displaying a secure or forgery-proof identity indicator on a screen using a display controller displaying the content of a memory unit of the graphic circuit on the screen, includes: drawing, by a client application, a graphic to be displayed on the screen into a client-specific region of the memory unit of the graphic circuit; drawing an identity indicator belonging to the client application into a memory region outside of the client-specific region; displaying the client-specific region of the memory unit of the graphic circuit on the screen; and simultaneously displaying the identity indicator from the memory region outside of the client-specific region on the screen. For displaying the identity indicator from the memory region outside of the client-specific region, access is only possible from the display controller such that the display of the identity indicator is secure or forgery-proof.