Thursday 28th of March 2024
 

Hybrid DCT-DWT Watermarking and IDEA Encryption of Internet Contents


M.A. Mohamed and A.M. El-Mohandes

Encryption and watermarking are complementary lines of defense in protecting multimedia content. Recent watermarking techniques have therefore been developed independent from encryption techniques. In this paper, we present a hybrid image protection scheme to establish a relation between the data encryption key and the watermark. Prepositioned secret sharing allows the reconstruction of different encryption keys by communicating different activating shares for the same prepositioned information. Each activating share is used by the receivers to generate a fresh content decryption key. In the proposed scheme, the activating share is used to carry copyright or usage rights data. The bit stream that represents this data is also embedded in the content as a visual watermark. When the encryption key needs to change, the data source generates a new activating share, and encrypts the corresponding data with the key constructed from the new activating share. Before transmission, the encrypted data is embedded in a multimedia stream. Each receiver can extract the encrypted data from the host image, and decrypt this data after reconstructing the same key. Our presentation will include the application of the scheme to a test image, and a discussion on the data hiding capacity, watermark transparency, and robustness to common attacks.

Keywords: discrete cosine transform, discrete wavelet transform, and international data encryption algorithm (IDEA), Bit correct ratio.

Download Full-Text


ABOUT THE AUTHORS

M.A. Mohamed
I received the PhD degree in Electronics and Communications Engineering from the Faculty of Engineering-Mansoura University-Egypt by 2006. After that he worked as an assistant professor at the electronics & communications engineering department until now. He has 27 publications in various international journal and conferences. His current research interests are in multimedia processing, wireless communication systems, and field programmable gate array (FPGA) applications.

A.M. El-Mohandes
I am a teaching Assistant at the Department of Electronics and communications Engineering, Faculty of Engineering, Mansoura University, Egypt. I got the B. Sc in electronics and communications Engineering 2008; excellent with honor, Faculty of Engineering-Mansoura University. My areas of interest are security systems and multimedia encryption techniques for cellular communications systems and internet content. I hope to join a research team in one of foreign universities in order to complete my research in this area.


IJCSI Published Papers Indexed By:

 

 

 

 
+++
About IJCSI

IJCSI is a refereed open access international journal for scientific papers dealing in all areas of computer science research...

Learn more »
Join Us
FAQs

Read the most frequently asked questions about IJCSI.

Frequently Asked Questions (FAQs) »
Get in touch

Phone: +230 911 5482
Email: info@ijcsi.org

More contact details »