RSA coprocessor for RFID (radio frequency identification device) intelligent card chip

Abstract

The invention discloses an RSA coprocessor for an RFID (radio frequency identification device) intelligent card chip. The RSA coprocessor comprises a main control unit for controlling the whole RSA encryption and decryption process, wherein the main control unit is connected with a storing control unit, a preprocessing unit and a modular exponentiation unit respectively through control lines; the modular exponentiation unit is connected with a subtracting processing unit through the control line; the preprocessing unit, the modular exponentiation unit and the subtracting processing unit are connected with a multiplexing logical operation unit; a storing control unit is connected with the preprocessing unit, the modular exponentiation unit and the subtracting processing unit, and connected to an intelligent card CPU (Central Processing Unit) through an external interface. The RSA coprocessor disclosed by the invention greatly improves the data processing efficiency, releases the data processing pressure of the intelligent card CPU, and meets the requirements on the efficiency and the stability of the encryption and decryption algorithm of the intelligent card chip RSA.

Description

technical field [0001] The invention relates to the field of RFID safety, in particular to an RSA coprocessor of an RFID smart card chip. Background technique [0002] From the perspective of the characteristics of the smart card chip itself, the security, computing power, large capacity, low cost, and low power consumption of RFID smart cards are the main research directions, among which security issues have a particularly important position in the application process of smart cards. Users, banks, or retailers are all concerned about the security of information transmission and the reliability of user identity authentication and transactions. In addition, people have high expectations for the security of smart cards, and many smart cards will be applied to some sensitive areas. Among them, if the information related to personal privacy is leaked, it will reduce the user's trust in the system using these smart cards. [0003] From the perspective of smart card chips, the so...

AI Technical Summary

Problems solved by technology

The difficulty in implementing this algorithm is that it needs to perform calculations of hundreds of decimal numbers. It takes nearly 10 seconds to realize the 1024-bit RSA encryption and decryption process on the PC software. It is almost impossible to realize the operation with an ordinary smart card 8bits CPU.

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