Address scrambling device and method for off-chip memory of on-chip system

Abstract

The invention provides an address scrambling device and method for an off-chip memory of a on-chip system. The device comprises a true random number generator, a key memory and a on-chip safety controller, the on-chip safety controller is respectively connected with the true random number generator, the key memory and the off-chip memory, the on-chip safety controller is used for reading and writing data in the off-chip memory, and an address scrambling process is carried out on the data; the on-chip safety controller comprises a memory interface module used for reading random keys in the keymemory, according to an effective / non-effective state of the random keys, choosing to directly invoke the read-out random keys or reading random keys generated from the true random number generator and stored in the key memory again, and according to an address without being scrambled inputted from the random keys through the memory interface module, carrying out a scrambling algorithm process tothe address without being scrambled to form a scrambling address, thereby outputting the scrambling address to an address scrambling module of the off-chip memory. The scrambling device is capable ofensuring a high effective processing ability and improving safety.

Description

Technical field [0001] The present invention relates to the technical field of on-chip system, in particular to an off-chip memory address scrambling device and method of a system on chip. Background technique [0002] With the development of the mobile Internet field, social informatization has reached an unprecedented height. Among them, mobile network equipment is the main representative of information exchange carriers. As a necessity in the contemporary information society, mobile network equipment has been widely promoted and applied for its mobile office and mobile transaction functions. While the rapid development of mobile equipment brings convenience and efficiency, it is also necessary to effectively protect the storage of information on mobile equipment. Safety. [0003] At the same time, based on computer technology, cryptographic theory and other methods, security mechanisms have been added to the design of SoC (System onChip) chips. However, traditional storage se...

AI Technical Summary

Problems solved by technology

However, traditional storage security protection is based on applications or software, which not only takes up CPU resources, greatly reduces the performance of the system chip and the efficiency of reading and writing off-chip memory, but also makes it difficult to defend against operating system vulnerabilities and software backdoors.

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