Highly Secure DWT Steganography Scheme for Encrypted Data Hiding

Steganography is an application for concealed writing. Nowadays, development in the field of electronic media demands highly secure data transfer between computers over the globe. There is a pressing demand to send the secret information in the hidden form. Conceal writing is an ultimate feature of steganography which fulfills this demand. In general; a robust steganography scheme should have better visual imperceptibility of the hidden information with sufficient payload. In this paper, a steganography method based on cryptography is proposed. The proposed scheme uses two processes; first, encrypt the secret plaintext (PT) message followed by secret image generation from this encrypted message. Second, hide this secret image into the cover image using Daubechies discrete wavelet transform operation followed by mixing operation. After performing the Daubechies inverse discrete wavelet transform (IDWT) process, we get the stego image. Stego image visual quality is increased by using Daubechies wavelet. The effectiveness of the proposed scheme is shown by experimental results.

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