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In this paper, we propose a lossless data hiding scheme in JPEG images. Afterquantified DCT transform, coefficients have characteristics that distributionin high frequencies is relatively sparse and absolute values are small. Toimprove encoding efficiency, we put forward an encoding algorithm that searchesfor a high frequency as terminate point and recode the coefficients above, sospare space is reserved to embed secret data and appended data with no fileexpansion. Receiver can obtain terminate point through data analysis, extractadditional data and recover original JPEG images lossless. Experimental resultsshow that the proposed method has a larger capacity than state-of-the-artworks.

A lossless data hiding scheme in JPEG images with segment coding