DSP embedded system debugging interface access control method

Abstract

The invention belongs to the technical field of embedded information security, and particularly relates to a DSP embedded system debugging interface access control method. Safety protection design iscarried out on a JTAG interface of a DSP chip in the DSP embedded system, full ciphertext form interaction of JTAG interface data of the DSP embedded system is achieved, and an unauthorized user can be effectively prevented from directly capturing the JTAG interface data to carry out reverse analysis cracking such as simulation analysis, decompilation and dynamic tracking debugging. According to the DSP embedded system, only a developer equipped with a corresponding encryption and decryption device can decrypt the JTAG interface data, so that the DSP chip is simulated and debugged, the core intellectual property of the developer is effectively protected, and the safety of the whole DSP embedded system is improved. The method can be popularized and applied to core autonomous intellectual property protection of military trade weapons and equipment, and can effectively prevent foreign parties from reversely analyzing and cracking the military trade weapons and equipment exported in Chinathrough JTAG interfaces.

Description

technical field [0001] The invention belongs to the technical field of embedded information security, and in particular relates to an access control method for a debugging interface of a DSP embedded system. Background technique [0002] DSP Embedded System (DSP Embedded System) is a general-purpose system that uses DSP devices as the core processor, is closely integrated with practical application systems, and embeds DSP systems into application electronic systems. This kind of system not only has the advantages of DSP in high-speed calculation and a large amount of data analysis and processing, but also has the technical characteristics required for practical application goals. [0003] JTAG (Joint Test Action Group) is an international standard test protocol, which is mainly used for chip internal testing and system simulation and debugging. JTAG technology is an embedded debugging technology, which encapsulates special testing in DSP and other chips. The circuit can tes...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: how to provide a DSP embedded system debugging interface access to the problem that unauthorized users can directly capture plaintext data through the JTAG interface and then carry out reverse analysis and cracking such as simulation analysis, decompilation, and dynamic tracking debugging. Control method, thereby effectively improving the overall security of the DSP embedded system and protecting the core intellectual property rights of developers

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