Word-Hunt: Um Método de Esteganografia LSB com Baixo Número Esperado de Modificações por Pixel (Word-Hunt: A LSB Steganography Method with Low Expected Number of Modifications per Pixel)

João Rafael Carneiro Tavares (jrt_ppges@poli.br)1, Francisco Madeiro Bernardino Junior (madeiro@poli.br)1


1Universidade de Pernambuco

This paper appears in: Revista IEEE América Latina

Publication Date: Feb. 2016
Volume: 14,   Issue: 2 
ISSN: 1548-0992


Abstract:
Least Significant Bit (LSB) steganography is a well known technique which operates in the spatial domain of digital images. In this paper, the LSB Word-Hunt (LSB WH) is presented. It is a novel LSB approach inspired by the word-hunt puzzle. The main focus of LSB WH is to reduce the Expected Number of Modifications per Pixel (ENMPP) when compared to other methods in the literature. The results show that LSB WH has an ENMPP around 0.315, for natural images with high entropy on the second and the third least significant bits. Results also show that the new method is robust to the statistical chi-square attack.

Index Terms:
image processing, LSB steganography, ENMPP reduction   


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