Steganographic coding using the multi-resolution discrete haar wavelet transform [Codificación esteganográfica usando la transformada de onditas haar discreta multi-resolución]

This work introduces a steganographic method that performs the concealment of information in a carrier signal without perceiving its presence. The encoding is done by applying the Multi-resolution Discrete Haar Wavelet Transform to the carrier signal and replacing the least significant bits of one of its component signals with the bits of the message that is being hidden. The method is capable of embedding the information in one-dimensional carrier signals, as well as in images once they have been conditioned as one-dimensional signals. A method for message retrieval is also introduced, in which, by applying the Multi-resolution Discrete Haar Wavelet Transform, the stego-signal is separated into its component signals, and the bits of the hidden message are extracted from the component in which they were inserted. The encoding and decoding methods were implemented in MATLAB and Simulink, and are both suitable to be implemented in systems based on CPLD (Programmable Complex Logic Device) or FPGA (Field Programmable Gate Array) devices. © 2018 Centro de Informacion Tecnologica. All rights reserved.

Discrete Haar wavelet transform; Message concealment; Signal coding; Steganography Encoding (symbols); Field programmable gate arrays (FPGA); Logic devices; MATLAB; Signal encoding; Steganography; Discrete haar wavelet transforms; Encoding and decoding; Fpga(field programmable gate array); Least significant bits; MATLAB and SIMULINK; Message concealment; One dimensional signal; Signal coding; Wavelet transforms

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