Design and Implementation of smart cards against DPA attacks

With the vigorous development of the personal computer, the impact of the evolution of the Internet and e-commerce, the market for security and privacy protection with strong demand. The notebook battery smart card has a lightweight and security features, secure payment network applications, network connectivity, security control, and electronic signature plays an important role. China have many information security applications with the smart card to the memory system secret information, necessary for the operation and use of the smart card has the computing power to enhance system security.

With the continuous development of the method of attack on the smart card, especially with the recent years, many new types of attack smart card technology has been published, the security of smart cards face enormous challenges. These attack techniques can be easily achieved by the low-cost equipment, such as power consumption, the execution time, when the input and output behavior of the fault, radiation, electricity spikes case information attack smart card. Among them, differential power analysis (Differential Power Analysis, DPA) is a very effective method of energy attacks.

In addition, taking into account the smart card using the CMOS process, its power consumption is dynamic power Pd and Pd size as shown in the following formula:mainly by means of statistical methods to extract key information related to the realization of the process is more complicated, but the attacker's Smart Card the requirements of the technical level is not very high, DPA successful attack on the smart card embedded encryption algorithm has been widely reported.smart cards are gradually replaced by magnetic cards are widely used in the financial and other related industries.

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