Storage protecting controller and method for improving safety of SOC (system on chip)

Abstract

The invention discloses a storage protecting controller and a method for improving safety of an SOC (system on chip). The method includes the steps: dividing a program code space of a processor into a plurality of code spaces, and setting an entry address corresponding to each code space; dividing a storage space into a plurality of storage protecting areas, individually setting access authority attributes of the processor to the storage protecting areas when each code space executes program codes; judging whether a program pointer of the processor skips or not and whether skip is abnormal or not, and generating skip abnormal indication if the skip is abnormal; and monitoring whether access of a current bus to the storage space is abnormal or not, and stopping access of the bus if access of the current bus to the storage space is abnormal, so that the program pointer of the processor is prevented from skipping from one code space to another code space to execute a program, and abnormal access to the storage protecting areas is prevented. The storage protecting controller can effectively improve program code running safety, and can be widely applied to SOC chips of various types.

Description

technical field [0001] The invention relates to SOC chip safety technology, in particular to a storage protection controller for improving program code operation safety in the SOC chip, and a method for improving the system safety of the SOC chip. Background technique [0002] SOC (System on Chip) chips are widely used in various fields of the information society. Its main functions include secure storage of user confidential data, security program function permission setting, electronic signature, identity authentication, and data encryption and decryption. [0003] Because of the importance of data in SOC chips, various attack methods against SOC chips emerge in endlessly. Software attacks usually use the standard interface protocols of security chips, encryption algorithms, and security holes in these algorithms to achieve attacks. Among the software attacks, the most common attacks are mainly program tampering, stack attacks, jump attacks, interrupt attacks, or tracking...

AI Technical Summary

Problems solved by technology

[0011] The present invention proposes a storage protection controller and a corresponding method for improving the safety of program code operation, and prevents illegal jumps of different code spaces by personalizing the access attributes of the storage protection area, so as to solve the problem that the current SOC chip is vulnerable to damage. Technical issues with low security due to attacks

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