Rapid and Blind Watermarking Approach of the 3D Objects Using QR Code Images for Securing Copyright

Watermarking techniques in a wide range of digital media was utilized as a host cover to hide or embed a piece of information message in such a way that it is invisible to a human observer. This study aims to develop an enhanced rapid and blind method for producing a watermarked 3D object using QR code images with high imperceptibility and transparency. The proposed method is based on the spatial domain, and it starts with converting the 3D object triangles from the three-dimensional Cartesian coordinate system to the two-dimensional coordinates domain using the corresponding transformation matrix. Then, it applies a direct modification on the third vertex point of each triangle. Each triangle’s coordinates in the 3D object can be used to embed one pixel from the QR code image. In the extraction process, the QR code pixels can be successfully extracted without the need for the original image. The imperceptibly and the transparency performances of the proposed watermarking algorithm were evaluated using Euclidean distance, Manhattan distance, cosine distance, and the correlation distance values. The proposed method was tested under various filtering attacks, such as rotation, scaling, and translation. The proposed watermarking method improved the robustness and visibility of extracting the QR code image. The results reveal that the proposed watermarking method yields watermarked 3D objects with excellent execution time, imperceptibility, and robustness to common filtering attacks.

Wavelet Denoising in a Highly Secure Covert Communication

Background: Since now a time, the main challenge is the security of publically available audio, video & text data i.e. social media communication; hence the author presents an exceedingly secure communication system to hide the data from an attentive adversary. Objective: The aim is to design and analyze a novel algorithm to be implemented for message transmission using multiimage LSB steganography and crucial variable-length cryptography. Encoder, decoder and social media as a channel are main parts of the study. Methods: This model uses different computer techniques like cryptography and steganography with video handling. The evolution interest of this work is to implement the raw video as the cover on the QR code image. This image is to be transmitted as information by enshrouding it in the raw footage. Additionally, encryption of QR code image using VLMKG (Variable length Mixed key Generation) cryptography improve the author's endeavors. The variable-length key is generated separately to implement the cryptography. In the proposed modal, multi-image LSB steganography is imposed which gives one-bit replacement in the spatial domain. Wavelet Transform (Daubechies family) has been applied for denoising purpose in a way to enhance the accuracy of receiving message. Results: The author found that using the proposed model on an agreement of five QR Code images with three raw video grouping, any information in the form of QR code image can be transmitted successfully. Conclusion: The creator efforts with LSB steganography, variable length key cryptography and MATLAB usage had superbly extracted the image features, calculations and the consequences were observed to be palatable.