Least Histogram Abnormality (LHA) Steganography Scheme

The emphasis of research into steganography is hiding capability.As the most important steganography, Least Significant Bit(LSB)steganography has hiding capability against human sense, but doesn'thave hiding capability against statistical analysis. It can bedetected byχ~2 analysis, Message Length analysis, RS analysis andGPC analysis. In order to resisting these steganalysis, Improved LSBsteganography is proposed. But it can be detected by DifferenceHistogram analysis. In order to resisting this analysis, ApproximateLeast Histogram Abnormality steganography is proposed. But it can'tachieve least histogram abnormality.In this paper, Least Histogram Abnormality(LHA) steganography isproposed through transforming the problem of least histogramabnormality into the problem of least sum of difference sequence. Itcan resist all steganalysis based on histogram statisticalcharacteristic and those steganalysis in preceding part.