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This paper describes an efficient hardware realization of the Advanced Encryption Standard (AES) algorithm using FPGA. The AES also known as the Rijndael algorithm was selected as a Standard on October 2, 2000 by National Institute of Standards and Technology (NIST). Encryption algorithms are used to ensure security of transmission channels. The authors use AES 128- bit block size and 128-bit cipher key for the implementation on Xilinx Virtex 5 FPGA. Xilinx ISETM 12.4 design tool is used for synthesis of the design. The design is coded using Very High Speed Integrated Circuit Hardware Description Language (VHDL). In their fully pipelined design, the operational frequency can be upto 347.6MHz and the throughput can be upto 44.5Gbits/s.
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