Smart card system

Abstract

The invention relates to a smart card system which comprises a central processing unit (CPU), a hardware algorithm module used for algorithm calculation, a memorizer used for storing program and data, a random access memory (RAM) and a firewall module, wherein the RAM module is used for providing algorithm running space as ordinary RAM used for a central processor unit (CPU) for a smart card hardware algorithm module. The firewall module is used for providing safeguard for a smart card algorithm RAM module. Due to the smart card system, in the process of algorithm running, only the hardware algorithm module accounts for the RAM. On the one hand, efficiency of the algorithm running is greatly improved, on the other hand, only the hardware algorithm module can read middle results of the algorithm running, and therefore the hacktivism that an illegal program uses CPU to maliciously read the results of the algorithm running to speculate a secret key or algorithm implementation is eliminated, and absolutely reliability of the hardware algorithm module is ensured.

Description

technical field [0001] The invention relates to the field of electronic technology security, in particular to a smart card system. Background technique [0002] The purpose of the birth of the multi-application smart card is to serve as a safe data storage carrier, but how to ensure the data security and algorithm processing speed of each application has become the key point for the smart card to support multi-application technology. With the advancement of smart card design technology, the data security of smart cards has been greatly improved to a certain extent. However, the algorithms used by applications carried on smart cards are becoming more and more complex and the types of algorithms are diversified, resulting in the algorithm execution. The occupation of memory RAM is also increasing. Therefore, how to achieve efficient algorithm execution in a limited RAM space is an important test criterion for the operating efficiency of a smart card. [0003] In addition, bas...

AI Technical Summary

Problems solved by technology

With the advancement of smart card design technology, the data security of smart cards has been greatly improved to a certain extent. However, the algorithms used by applications carried on smart cards are becoming more and more complex and the types of algorithms are diversified, resulting in the algorithm execution. The memory RAM is also taking up more and more, so how to achieve efficient algorithm execution in the limited RAM space is an important test standard for the operating efficiency of the smart card

[0003] In addition, based on the current smart card has been widely used in many fields, including the field of financial electronic payment, because its key data cannot be read by the outside world, criminals are driven by interests to illegally read the sensitive information of the smart card. Emerging in endlessly: such as embedding illegal applications in the card, by continuously reading the intermediate results of the data interception algorithm operation in RAM, and deducing sensitive information such as algorithm implementation principle and key value from the intercepted large amount of intermediate operation data, resulting in financial loss or authority Give way

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