This research is inspired by the constraints of the present video steganography methods and to enhance their performance. It contributes its objective via employing the transforming steps to involve the processing of both cover videos and clandestine information for improving their robustness and security. Consuming a part of every frame as areas of concentration for the hiding procedure, this leads to improve the video imperceptibility resulted from steganography. In view of that, selecting the coefficients for embedding information in the video. Subsequently it adds obstacle in front of intruders to identify the place of the hidden information within frames since they are just covered within such coefficients, this dynamically changes depending on both the video frame and clandestine information, it is essential to save the embedding robustness and security. Converting the cover into a frequency domain like DWT will enhance the steganographic robustness counter to threats.
<p><span lang="EN-US">Information security is one of the most important branches concerned with maintaining the confidentiality and reliability of data and the medium for which it is transmitted. Digital watermarking is one of the common techniques in this field and it is developing greatly and rapidly due to the great importance it represents in the field of reliability and security. Most modern watermarking systems, however, use the self-organization map (SOM), which is safer than other algorithms because an unauthorized user cannot see the result of the SOM's training. Our method presents a semi-fragile watermark under spatial domain using least significant bit (LSB) and by relying on most significant bit (MSB) when the taken values equal to (2 or 4 bits) depending on the characteristics of SOM through developing the so-called best matching unit (BMU) which working to determine the best location for concealment. As a result, it shows us the ability of the proposed method to maintain the quality of the host with the ability to retrieve data, whether it is a binary image or a secret message.</span></p>
As in last few years, quantum cryptography appears to overcome the current challenges of time and quality of the encryption systems and offer new fields of cryptography. This paper briefly introduces the quantum cryptography from the basic ideas, theoretic foundation, as well as analyses some innovative papers where used quantum theory in the field of cryptography especially for image encryption. Formerly, current work illustrates the accomplishments of quantum cryptography in image encryption methods and its upcoming progress schemes. Conclusively, its motivation to make a general view that represents a new trend in cryptography scheme can be developed on the benefits of the quantum cryptography.
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