Implementation of Optimized DES Encryption Algorithm upto 4 Round on Spartan 3

Data Security is an important parameter for the industries. It can be achieved by Encryption algorithms which are used to prevent unauthorized access of data. Cryptography is the science of keeping data transfer secure, so that eavesdroppers (or attackers) cannot decipher the transmitted message. In this paper the DES algorithm is optimized upto 4 round using Xilinx software and implemented on Spartan 3 Modelsim. The paper deals with various parameters such as variable key length, key generation mechanism, etc. used in order to provide optimized results.