• Vangmai Sheshatwam
• B Sreekanth Reddy

Now a day, Cryptography plays a major role to achieve the goal of secure communication and avoid an unauthorized access of data. Secured key assumes a vital part in cryptography. In this proposed concept Data encryption standard (DES) Algorithm is used as it is well-suited for the VLSI implementation of low-cost lightweight cryptography applications. Any cryptographic algorithm security mostly relies on the privacy of the key. To increase the level of security, “Dynamic Key Theory” is presented and analyzed in this paper. Dynamic key method enhances the DES algorithm securities using multiple key generation techniques to achieve the goal of secure communication. For implementation, this project is done in two parts, one is DES algorithm part other is key generation part using multiple keys. To control the rounds of DES encryption/decryption mode, control unit starts to operate. The proposed architecture is modeled using Verilog HDL in Xilinx ISE. Simulation results can be verified using either Mentor Graphics Tools or Xilinx ISE. Figures of merit are implemented to understand the performance of different keys.

Cryptography, DES, GRAY-X, Dynamic Key, Security.

"Implementation of Secure Cryptographic Key Techniques for DES Algorithm using Verilog HDL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.233-238, June 2019, Available :http://www.jetir.org/papers/JETIR1906K23.pdf

"Implementation of Secure Cryptographic Key Techniques for DES Algorithm using Verilog HDL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp233-238, June 2019, Available at : http://www.jetir.org/papers/JETIR1906K23.pdf