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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

MARTINEZ, Alejandro; COMPEAN, Isaac; FOSADO, Rosa E.  y  AVILA, Raquel. Steganographic Coding using the Multi-resolution Discrete Haar Wavelet Transform. Inf. tecnol. [online]. 2018, vol.29, n.4, pp.317-328. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642018000400317.

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.

Palabras clave : steganography; discrete Haar wavelet transform; message concealment; signal coding.

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