Design and Implementation of Bit Permutation Operation Unit

Traditional CPU instructions provide limited support to the bit permutation operation which is frequently used in the various symmetric encryption algorithms.Due to this reason,researcher Ruby B.Lee at Princeton University presented the bit permutation instructions and proved that the bit permutation instructions played an important role on improving the performance of cryptographic algorithms for general processors.Our attention is emphasized at the hardware implementation of the bit permutation instructions,and we present a bit permutation functional unit which is validated on FPGA of ALTERA′s Cyclone EP1C12Q240C6N.