ASIC implementation of convolution encoder and viterbi decoder based cryptography system

Abstract

In the convolutional operation encodes the transmitted operation encodes the transmitting signal some dispensable information, thus improving the channel data capacity. Viterbi algorithm is commonly used for sensitive models including the decoding the convolutional codes widely used in communication systems such as Satellite communication, Relays and Local wireless channel network. In additional, Viterbi algorithm is used to automatic speech generation and also storage devices as well as application. Cryptography is a scheme used to hide and secure the information without any loss. We have developed a security system of convolutional encoder and Viterbi decoder using DNA cryptography. DNA is used for cryptography due to encryption of convolutional encoder and decryption of Viterbi. Viterbi decoder is one used blocks in data communication systems. Optimizing its word length causes a substantial reduction within the chip space and decryption delay. FPGA synthesis reports the Xilinx tool of using the Viterx-6 family.