A smart card hardware firewall system and its implementation method
A firewall and smart card technology, applied in the direction of preventing unauthorized use of memory, etc., can solve the problems that other application security cannot be guaranteed, and achieve the effect of ensuring security and improving security performance
Active Publication Date: 2015-12-09
NATIONZ TECH INC
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Problems solved by technology
However, before each application in the system is invoked, its storage area and access rights are written into the segment table by the operating system, that is, the operating system has higher authority than all other applications. Therefore, once the operating system is maliciously invaded, other Application security will not be guaranteed
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[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0034] figure 1 It is a block diagram of the application system of the smart card hardware firewall system in the embodiment of the present invention, as figure 1 As shown, the smart card hardware firewall system 103 is located between the smart card CPU 105 and the memory 100 (wherein the memory 100 includes the program memory 101 and the data memory 102), that is, when the CPU 105 accesses the memory 100, the access address and the access operation initiated through the bus 104 must first After the inspection of the smart card hardware firewall system 103, if the accessed address and the access operation meet the access control principle, then address as usual; otherwise, the access status register is set by the h...
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The invention relates to an intelligent card hardware firewall system and a realizing method thereof. The system comprises a storage logic subsection management module, a storage space assess authorization control module and a logic circuit module. The storage logic subsection management module is used for dividing a storage into one or a plurality of storage sections which are independent in logic, subsection management is achieved according to storage space, and each storage section stores program codes or data files with independent logical relationship. The storage space assess authorization control module is used for setting access authorization between a program code storage section and a data file storage section. The logic circuit module is used for receiving an address access signal and judging whether the address access signal is valid according to the program code section currently running and the access authorization set by the storage space assess authorization control module. According to the intelligent card hardware firewall system and the realizing method thereof, logic subsection management and space access control are achieved on a storage, so that safe coexisting of a plurality of applications on the same intelligent card is achieved, the hidden danger that an invalid program modifies an access zone and authorization of an application program through an operating system is avoided, and safety of the intelligent card is guaranteed.
Description
technical field [0001] The invention relates to the field of electronic technology security, in particular to a smart card hardware firewall system and its realization method. Background technique [0002] The earliest smart card was just a memory card that provided protected non-volatile memory (such as a phone card, etc.). Bank cards, etc.) are used more and more, and new smart cards have microprocessors and memories, which can be used for safe processing and storage; and then the technology of carrying multiple applications on a smart card has also become a reality, making a A smart card has the convenience of being used in multiple industries (such as banking, securities, etc.), which greatly facilitates the lives of the people and will become a trend in the development of smart card technology. However, with the increase in applications, how to ensure the security of each application? Data security becomes the key point for smart card to support multi-application techn...
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IPC IPC(8): G06F12/14
Inventor 刘芳
Owner NATIONZ TECH INC