A comment on "Sharing secrets in stegoimages with authentication"

  • Authors:

  • Ching-Nung Yang;Chuei-Bang Ciou

  • Affiliations:

  • Department of Computer Science and Information Engineering, National Dong Hwa University, #1, Sec. 2, Da Hsueh Rd., Hualien, Taiwan;Department of Computer Science and Information Engineering, National Dong Hwa University, #1, Sec. 2, Da Hsueh Rd., Hualien, Taiwan

  • Venue:
  • Pattern Recognition
  • Year:
  • 2009

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Abstract

Recently, Chang et al.'s image secret sharing (ISS) scheme enhanced the weak authentication of two previous ISS schemes-Lin et al.'s scheme and Yang et al.'s scheme. Also, the authors claimed that the visual qualities of stegoimages were superior to the previous two schemes; however, their qualities were not really that improved. Contrarily, the qualities are significantly degraded when compared with those in Yang et al.'s scheme. This miscalculation is owing to a misunderstanding of Yang et al.'s scheme.