Bus data protection method and device, storage medium and chip

Abstract

The invention discloses a bus data protection method and device, a storage medium and a chip, and belongs to the technical field of chip security. The method comprises the following steps that: when afirst module is a master module, a second module is a slave module and the first module performs a write operation on the second module, or when the first module is the slave module, the second module is the master module and the second module performs a read operation on the first module, the first module sends sensitive data to a bus encryption module; the bus encryption module acquires a firstrandom number, and sends encrypted data obtained by encrypting the sensitive data according to the first random number to a bus; the bus sends the encrypted data to a bus decryption module; and the bus decryption module obtains a second random number and sends sensitive data obtained by decrypting the encrypted data according to the second random number to the second module, and the second randomnumber is the same as the first random number. According to the bus data protection method and device, the storage medium and the chip of the embodiments of the invention, the consistency of random numbers can be ensured, the security and accuracy of data transmission are improved, and the overhead of bus bit width is reduced.

Description

technical field [0001] The embodiments of the present application relate to the field of chip security, and in particular to a bus data protection method, device, storage medium, and chip. Background technique [0002] As the core component of the system, chips play a pivotal role in major fields such as computers, consumer electronics, network communications, and automotive electronics. In order to improve the security of sensitive data in the chip, the entire process of sensitive data in the chip from generation (one end) to use / consumption (one end) needs to be protected by encryption. Currently, the more common encryption protection technology is bus encryption technology. [0003] Most of the current chips use a bus to connect the master module and the slave module, thereby realizing the data interconnection between the master and slave modules. In many chips, the bus is a topological structure spread throughout the chip, which can physically exist in various parts of ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a bus data protection method, device, storage medium and chip, which are used to solve the problem of low security and increased bus bit width when transmitting masked sensitive data and masked random numbers on the bus at the same time the cost of the problem

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