In this work, we are interested in the insertion of the watermarking of digital images in the frequency domain. The algorithm proposed uses the transformed into wavelet Legall 5/3 on an image encrypted by swapping on the Z/pZ field, to perform the watermarking. By consequence, this introduces the concept of keys to the traditional methods of non-blind watermarking. The results of the application of this method on the fixed image (presented in the section: Application and results show well its performance.
Issues of security and compression of transmitted data have become an important concern in multimedia technology. In this study, we propose an efficient approach to secure video sequences in real time using the method of choosing reference images that is based on the Faber-schauder Multi-scale Transform to reduce the data flow. The encryption step is based on the principle of affine encryption to achieve transposition and to perform some manipulations such as puzzle to reduce the amount of bits to be processed on the image. Testing this approach on video sequences revealed an improvement in data flow and provides a stronger security and a good encryption time.
The compression and the data encryption are two technologies whose importance is growing exponentially in a myriad of applications. In addition, the excessive use of computer networks for data transfer must obviously obey to a double objective: the reduction of the volume of data in order to clutter the maximum possible public networks of communication and the confidentiality in order to ensure an optimum level of security. In this sense, and in order to ensure the optimization and securing of the transmission and storage of still images, we propose in this work a new hybrid approach for crypto-compression which applies an encryption based on the AES algorithm on the parameters of the compression by network of neuron multilayer.
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