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Z2Z4-Additive Perdect Codes in Steganography

By Helena Rifà Pous, Lorena Ronquillo and Josep Rifà Coma


Steganography is an information hiding application which aims to hide secret data imperceptibly into a cover object. In this paper, we describe a novel coding method based on Z2Z4-additive codes in which data is embedded by distorting each cover symbol by one unit at most (+-1-steganography). This method is optimal and solves the problem encountered by the most e cient methods known today, concerning the treatment of boundary values. The performance of this new technique is compared with that of the mentioned methods and with the well-known rate-distortion upper bound to conclude that a higher payload can be obtained for a given distortion by using the proposed method

Topics: Stegranography, data hiding, codes, codis, ocultació d'informació, códigos, ocultación de datos
Year: 2011
OAI identifier: oai:openaccess.uoc.edu:10609/8863

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