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2. Xilinx: Virtex 2.5V field programmable gate arrays data sheet, available from
http://www.xilinx.com
3. Xilinx, Pasham, V., Trimberger, S.: High-Speed DES and Triple DES Encryptor/ Decryptor (August 2001), available from
http://www.xilinx.com/xapp/xapp270.pdf
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