Implementation of Modified Dual-Coupled Linear Congruential Generator in Data Encryption Standard Algorithm

Data transmission in cryptography is held by encipher and decipher processes. Data Encryption Standard is one of the symmetric key encryption algorithms. Data Encryption Standard (DES) is one of the simplest cryptography algorithms. Modified Dual Coupled LCG (MD-CLCG) is an essential element of Pseudorandom Bit Generator (PRBG) because it requires less area and it is more secured compared to previously executed different algorithmic techniques of linear congruential generator (LCG) family and other pseudorandom bit generators. In cryptographic schemes key generation makes an important role. This paper has implemented a modified dual-CLCG for the key generation with the utilization of shift register in Data Encryption Standard cryptographic technique. Usage of Modified Dual-CLCG in Data Encryption Standard algorithm is designed and coded by the Verilog-HDL language and prototyped on FPGA device Spartan3E XC3S500E.