Modified BPCS steganography using Hybrid cryptography for improving data embedding capacity

In today´s information age, information sharing and transfer has increased exponentially. The threat of an intruder accessing the secret information has been an ever existing concern for data communication experts. Cryptography and steganography are the most widely used techniques to overcome this threat. This paper is based on hybrid cryptographic techniques based on DES and RSA algorithms to achieve data encryption and compression technique to store large amount of data. A combination of both provides superior security control. The suggested algorithm is modified BPCS (Bit Plane Complexity Segmentation) steganography technique that can replace all the “noise-like” regions in all the bit-planes of the cover image with secret data without deteriorating the image quality. According to the experiments, the messages can be successfully camouflaged in the cover image, and the stego images have satisfactory quality. Moreover, our scheme allows for a large capacity of embedded secret data and can be extracted from stego-image without the assistance of original image.