A reconfigurable modular arithmetic unit for public-key Cryptography

This paper analyzes the reconfigurable design principles of public-key cryptography and the characteristics of modular arithmetic iteration process. According to the analysis results, a structure-adaptive reconfigurable modular arithmetic unit for Public-key cryptography is implemented, which architecture is able to support both RSA and ECC(Fp) algorithms security parameters dynamic arbitrary changing. Based on 0.18 micrometer standard cell-library, the area of the chip is only 42000 mum². Simulation results of post-synthesis indicate that the maximum operating clock frequency is 103.8 MHz, the 1024-bit RSA modular exponential operation period is about 45 ms, and the 192-bit ECC(Fp) point multiplication period is 17 ms on average.