Efficient Hardware Design and Implementation of Encrypted MIPS Processor

The paper describes the design and hardware implementation of 32-bit encrypted MIPS processor based on MIPS pipeline architecture. The organization of pipeline stages in such a way that pipeline can be clocked at high frequency. Encryption and Decryption blocks of data encryption standard (DES) cryptosystem and dependency among themselves are explained in detail with the help of block diagram. In order to increase the processor functionality and performance, especially for security applications we include three new instructions 32-bit LKLW, LKUW and CRYPT. The design has been synthesized at 40nm process technology targeting using Xilinx Virtex-6 device. The encrypted MIPS pipeline processor can work at 218MHz at synthesis level and 744MHz at simulation level.