Secure Image Transmission over Wireless Channels

The advances in communication technology have seen strong interest in digital signal transmission. However, illegal data access has become more easy and prevalent in wireless and general communication networks. Data security has become a critical issue. In order to protect valuable data from undesirable readers, data encryption is essential. Furthermore, the wireless channels have fluctuating channel qualities and high bit error rates. For reliable communications, channel coding is often employed. As such in this paper, a scheme based on encryption and channel coding has been proposed for secure data transmission over wireless channels. In the proposed scheme, the encryption and decryption algorithms based on Brahmagupta- Bhaskara equation are developed for data security. Turbo codes are used as channel coding for data communication over wireless channels with burst errors. The efficacy of the proposed scheme is demonstrated through implementation results for an image communication over wireless channels.