Hiding of Encrypted Data in Real and Imaginary Parts of Frequency Domain

  • Muna Jaffer Al-Shamdeen, Sameera Abbas Fadhel


In this paper we submit a new method combined between steganography used discrete cosine transform (DCT) and cryptography used AES, this method was implemented on a digital image. The data is encrypted using the AES algorithm and Steganography implemented by converting image to the frequency domain using DCT and  Identify the points that represent the shape of the letter Z to hide the data in the real and imaginary parts of the points identified .The measurement method used to determine the quality of stego image is the peak signal to noise ratio (PSNR) and normalized Correlation (NC) to measure the quality of the algorithm and we obtain a good result.