The Optimized Design of Rijndael Algorithm Based on SOPC

Based on the analysis of the round transformation and key expansion, the advanced encryption standard (AES) algorithm is optimized through the look-up table. And then the optimized Rijndael algorithm based on SOPC (system on a programmable chip) is designed and implemented through software and hardware. According to the software design flow chart of the optimized Rijndael algorithm, the program design of the corresponding B table and key generator are completed. The testing results are: the highest working frequency is 147 MHz; the biggest data flow is 2382 Mbps. The design of the Rijndael algorithm based on "NIOS II + FPGA" can achieve a higher data processing speed while it occupies relatively low resources. The design has a big breakthrough compared to the traditional FPGA realization.