On YASS’s Non-monotonic Security Performance

Lifang Yu, Yao Zhao, Rongrong Ni, Yun Qing Shi

Research output: Contribution to journalArticlepeer-review


Recently, researchers have discovered unexpected bumps in the detection rate curve of yet another steganographic scheme (YASS). We refer to this abnormal phenomenon as non-monotonic security performance. This paper first analyzes this abnormality and points out that it is caused by the non-uniformity in probability of coincidence of (Formula presented.) embedding blocks and (Formula presented.) JPEG blocks. Based on this observation, we propose that further randomizing data embedding positions can overcome the non-monotonic security performance. Experimental results have demonstrated a complete removal of bumps in the detection rate curve of YASS after further randomization.

Original languageEnglish (US)
Pages (from-to)3527-3537
Number of pages11
JournalCircuits, Systems, and Signal Processing
Issue number11
StatePublished - Nov 2014

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Applied Mathematics


  • JPEG domain
  • Non-monotonic security
  • Steganalysis
  • Steganography
  • Yet another steganographic scheme (YASS)


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