This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.
Home > FPGA Technical Tutorials > Design Recipes for FPGAs Using Verilog and VHDL > Secure Systems

TABLE OF CONTENTS

Xilinx FPGA FPGA Forum

Secure Systems

FONT SIZE : AAA

Introduction to Block Ciphers 

The data encryption standard (DES) is a symmetric block cipher. A stream cipher operates on a digital data stream one or more bits at a time. A block cipher operates on complete blocks of data at any one time and produces a ciphertext block of equal size. DES is a block cipher that operates on data blocks of 64 bits in size. DES uses a 64-bit key 8 × 8 including 1 bit for parity, so the actual key is 56 bits. DES, in common with other block ciphers, is based around a structure called a Feistel Lattice so it is useful to describe how this works.


  • XC4VLX15-11FFG668C

    Manufacturer:Xilinx

  • FPGA Virtex-4 LX Family 13824 Cells 90nm Technology 1.2V 668-Pin FCBGA
  • Product Categories: Connecteurs

    Lifecycle:Active Active

    RoHS:

  • XC17256ELPC20C

    Manufacturer:Xilinx

  • PROM Serial 256K-bit 3.3V 20-Pin PLCC
  • Product Categories: Memory - Configuration Proms for FPGA's

    Lifecycle:Obsolete -

    RoHS: No RoHS

  • XC17256EPC20C

    Manufacturer:Xilinx

  • PROM Serial 256K-bit 5V 20-Pin PLCC
  • Product Categories: Memory - Configuration Proms for FPGA's

    Lifecycle:Obsolete -

    RoHS: No RoHS

  • XC4013E-4PG223C

    Manufacturer:Xilinx

  • FPGA XC4000E Family 13K Gates 1368 Cells 0.35um Technology 5V 223-Pin CPGA
  • Product Categories: Disjoncteur

    Lifecycle:Obsolete -

    RoHS: No RoHS

  • XC3S1500-FG676I

    Manufacturer:Xilinx

  • Xilinx BGA
  • Product Categories:

    Lifecycle:Any -

    RoHS:

Need Help?

Support

If you have any questions about the product and related issues, Please contact us.