Nowadays we are witnessing a total convergence towards a digital world where information is digitized, conveyed and processed using highly developed techniques and tools. The development of broadband networks, including the internet, has made easy the manipulation, transmission and sharing of information. However, new security issues arise and they are particularly related to integrity, confidentiality and traceability of data. Facing this situation, network security has become very important and challenges related to the protection of exchanged data over the internet against unauthorized access and use have increased. In the current work, we propose to implement an optimized steganography technique over TCP/IP protocol [1]. We have also tested it against well-known security equipment using latest versions. We will see that they are inefficient to stop this kind of cover channels. Our work is like an alarm to every IT administrator to change their thinking about data lost prevention (DLP) and exfiltration of sensitive information.
Today's digital media have made the product (digital content) very flexible and diminished the cost of its distribution. However, it contributes on piracy explosion as digital content can be duplicated and re-distributed at virtually no cost. Watermarking technology appears in order to protect the intellectual property and fight the piracy. It consists on embedding data like copyright labels inside a data source without changing its perceptual quality. In audio domain, watermarking techniques rely on the imperfection of the human auditory system in order to embed data.
In this paper, we completed a design based on echo hiding technique and implement it in MATLAB.The main idea of this method is to embed data into an original signal by introducing an echo with the appropriate delay. Subjective listening tests reveal that the watermarks are imperceptible. Fidelity tests show that quantity of distortion imposed by watermarks on a signal is small. Robustness tests against common signal processing reveal good responses. The watermark information is always detectable and recoverable.
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