High Security Steganography Model Based on DWT, DCT and RSA

Ali Kadhim Bermani

Abstract: The steganography is the science of concealing secret information in media files (i.e., image, text, audio, etc.), so that, such information is not noticeable by the eavesdropper. There are many techniques are used to hide secret information to achieve high quality of stego image and high embedding capacity. Also, many challenges in steganography including the attempts to reveal these secret information that has been hidden. A plenty of researches have tried to develop a lot of techniques and algorithms to find solutions to this problem. This study proposed high security model for hiding image (secret image) in another image (cover image) where more than one algorithm has been utilized such as: Discrete Wavelet Transform (DWT) algorithm and applied DCT algorithm to compression the secret image and provide more space for hiding secret image and applied RSA algorithm to encryption and provide more secure. Certain quality metrics such as Peak Signal to Noise Ratio (PSNR) and Mean Square Error (MSE) also Compression Ratio (CR) have been used to calculate the quality of the this model. The proposed model is implemented using visual basic 6 programming language.

Steganography, stego image, Discrete Wavelet Transform (DWT), Discrete Cosine Transform (DCT), Rivest-Shamir-Adleman (RSA), Mean Square Error (MSE), Peak Signal to Noise Ratio (PSNR).