Design a Hybrid Cryptosystem Based Chaos and Sharing for Digital Audio

Z. Abdullah, Mahmood; J. Khaleefah, Zinah

	Design a Hybrid Cryptosystem Based Chaos and Sharing for Digital Audio
IRAQI JOURNAL OF COMPUTERS, COMMUNICATIONS, CONTROL AND SYSTEMS ENGINEERING
Article 1, Volume 17, Issue 1, 2017, Pages 59-70
Authors
Mahmood Z. Abdullah; Zinah J. Khaleefah
Abstract
With the growth rate of wireless communication with internet and multimedia. The wireless network has expanded their applications in our life. Cryptography and steganography play important role within data security. This paper chiefly produces a novel hybrid cryptography and steganography for digital audio base chaos system and secret sharing scheme algorithm. These algorithms have multilevel of processing with the digital audio to increase the level of security. In this algorithm, digital audio was encrypted with a novel encryption method based Lorenz chaos map. Then, divide the encrypted audio to N encrypted audio based on secret sharing scheme. Finally, hiding N encrypted audio in N cover images with chaos system process. The result shows that the algorithm for audio encryption have a high degree of confidence, large key space reached more than 2672 possible of a key, key sensitivity, and high quality of recovered digital audio. Chaos system and secret sharing process with multi-cover images offers additional space, security for the secret audio message, and quality for cover images. The power signal to noise ratio of cover images reached to 57db with embedding 334 KB of secret audio with four cover images.
Keywords
Lorenz chaotic map; Audio cryptography; Steganography; Secret Sharing Scheme; Encryptio; Dycryption

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