A combined pixel in block hiding method and hill cipher for secure stenography technique

الملخص EN

In this paper a secure stenography technique is proposed and developed.

This technique uses the well known hill substation cipher.

The proposed method is based on a modified spatial domain hiding method for images.

The cover image is partitioned into number of squares blocks of equal sizes completely covering the image.

The hided image is divided into pixels then the pixels are encrypted using hill cipher.

Each encrypted pixel of the hided image is embedded into a block in the cover image.

The selection is based on the nearest RGB value of the cover block to the value of the embedded image pixel.

A certain deviation between the RBG value and the embedded pixel is allowed.

The proposed technique is demonstrated using different examples.

The perceptual transparency using PSNR is evaluated.

The simulation results give satisfying hiding results which include secure and fast performance.