Data hiding in image using DCT

Abstract

In this paper, an efficient stegnographic technique based on the discrete cosine transform (DCT) of image is proposed. In this technique, the DCT coefficient is quantized using a predefined mathematical operation then the secret bits is embedded in low and middle frequency component of the quantized DCT coefficient using least significant-bit (LSB) to enable a large message capacity. A comparison between the proposed technique and other existing technique is introduced. The results demonstrated that the performance of the proposed algorithm is satisfied compared to them.

Keywords: Steganography; Data hiding; DCT; LSB.