On Estimation of Secret Message Length in JSteg-like Steganography

  • Authors:
  • Xiaoyi Yu;Yunhong Wang;Tieniu Tan

  • Affiliations:
  • Chinese Academy of Sciences, P.R. China;Chinese Academy of Sciences, P.R. China;Chinese Academy of Sciences, P.R. China

  • Venue:
  • ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 4 - Volume 04
  • Year:
  • 2004

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Abstract

Image steganalysis has attracted more attention recently. In this paper, a new method for detecting secret message and estimating the secret message length of bit-streams embedded using J-Steg like steganography is proposed. First, based on the model of statistical distribution of quantized DCT coefficients, the histogram of cover image is estimated from stego image. Then the secret message is detected and the secret message length is estimated with the estimated cover histogram. Interestingly, our study on steganalysis of J-Steg like embedding offers a proof of Zhang et al.'s method [A Fast and Effective Steganalytic Technique against Jsteg-Like Algorithms]. The methodology described in this paper is a framework which can also be applied to many other stegaographic methods such as JPEG2000 file format embedding.