Fault-tolerant visual secret sharing schemes without pixel expansion

Justie Su Tzu Juan, Yung Chang Chen, Song Guo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


Visual cryptography encrypts a secret image into two meaningless random images, called shares, such that it can be decrypted by human vision without any calculations. However, there would be problems in alignment when these two shares are staked by hand in practice. Therefore, this paper presents the fault-tolerant schemes of stacking two shares that are acquired from secret image encryption without pixel expansion. The main idea of these schemes is to combine several pixels as a unit and then to encrypt each unit into a specific combination of pixels. Both theoretical analysis and simulation results demonstrate the effectiveness and practicality of the proposed schemes.
Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalApplied Sciences (Switzerland)
Issue number1
Publication statusPublished - 1 Jan 2016
Externally publishedYes


  • Pixel expansion
  • Random grid
  • Tolerance
  • Visual cryptography
  • Visual secret sharing

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Process Chemistry and Technology
  • Computer Science Applications
  • Engineering(all)
  • Materials Science(all)
  • Instrumentation


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