Bus arbitration starting method of reliable embedded system

Abstract

The invention provides an embedded type system start-up guiding method which is established on the basis of a trusted mechanism, wherein, an embedded type system is combined with a trusted platform module (TPM); an external memory device in the embedded type system is independent from the system and reading and writing of the external memory device are controlled by the TPM; integrity verification of executable codes in an external memory must be performed by the TPM during the start-up process of the embedded type system; the authority of reading and writing of the external memory can be endowed to the embedded type system by the TPM only when verification passes, and the embedded type system is allowed to be started up. In the invention, the TMP is at the core position during the start-up process of the system and can conveniently realize start-up flow of the trusted embedded type system by controlling a bus arbitration chip; moreover, the TMP has the advantages of convenient and flexible start-up control, convenient extension, reliable and safe operation and so on.

Description

technical field [0001] The present invention relates to the field of trusted embedded platforms, in particular to a chained trust start-up architecture following the idea of ​​Trusted Computing (Trusted Computing, TC) [1], and a trusted embedded system for embedded platform security guidance mechanism Bus arbitration start method. Background technique [0002] Credibility refers to "when an entity achieves a given goal, its behavior will always achieve the same results as expected." [0003] Credibility emphasizes the predictability and controllability of behavioral outcomes. [0004] Trusted computing refers to the predictable behavior of a trusted component, operation or process, which can resist certain physical interference and damage caused by bad code. [0005] The basic idea of ​​trusted computing is to formulate security specifications from the aspects of chip, hardware structure and operating system to ensure the security of computer and network structures. It ta...

AI Technical Summary

Problems solved by technology

[0019] The implementation structure of PC has the following problems: the chain measurement structure is adopted, and the lack of trust in the transfer process will be amplified step by step in the process of trust transfer; BIOS is used as the trusted basis of PC, not TPM

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