An Efficient Encryption and Decryption Method for Image Steganography

Abstract

In a digital world, data protection has become highly important issues. For secure data transmission, steganography and cryptography are used where steganography is focusing on the existence of a message secret and cryptography is focusing on content message secret combing both technologies will give more protection for data. In this paper, a base64 encoding method is used to encrypt the secret information which will be embedded into the cover image. An android application is built to perform encoding and decoding operations which is user friendly, fast and secure. Image quality is measured using Peak Signal to Noise Ratio (PSNR), Mean Square Error (MSE) and histogram analysis. The experimental result shows that the stego image can store large amount of data while PSNR, MSR, and histogram analysis values proves that stego image quality is almost similar to cover image and distortionless images.

Keywords:Steganography, LSB, cryptography, Base64.