Steganography Based on Chaotic Torus Automorphisms

Secure transmission of information is one of the big challenges of knowledge society. Steganography is the transmission of secret messages embedded within other covering messages which conceal the existence of underlying messages (steganosis). In cryptography however, the presence of secret messages is known. We develop a new Steganography method based on Chaos, for concealing texts or images embedded within other transmitted images. Chaotic Torus Automorphisms are employed as mathematical randomization mechanisms for: i) the selection of the cover image pixels where the initial message (text or image) is inserted, ii) the encryption of the initial message (text or image). We have developed the software for efficient implementation of the algorithms in real-time.