ROBUST IMAGE STEGNOGRAPHY USING DWT AND DCT

Vasudha, Chrispin Jiji

Abstract: Most imaportant area in the recent years is the field of stegnography. It is the method of hiding data in the cover image, it can be done through the form of text, video or audio. The information is passed from the sender to the receiver without giving any hint to the external users. LSB technique fail to provide the complete security, in order to overcome this problem DCT is applied. Spatial domain is converted to frequency domain by the use of DCT. Encryption is done uding RSA algorithm. This is a robust method. From the result it will be clear that the proposed method shows the better PSNR value.

Keywords: Stegnography, Spatial Domain, Discrete Wavelet Transform, Discrete Cosine Transform, Data Hiding, Robustness, PSNR, MSE

DOI: https://doi.org/10.15623/ijret.2016.0516080