Chaotic Encryption and Privilege Based Visual Secret Sharing Model for Color Images


  • Aytekin Yildizhan Computer Engineering Department, Hacettepe University, 06800 Ankara, Turkey
  • Nurettin Topaloglu Computer Engineering Department, Gazi University, 06500 Ankara, Turkey



Cryptography, chaotic map, information security, visual secret sharing


In the Privilege-based Visual Secret Sharing Model (PVSSM), each share has a unique privilege and a higher-privilege share contributes with more privilege to reveal the secret image. However, in PVSSM, when several shares with the higher priority are stacked, the secret image can be visibly displayed. This security problem is solved by applying a two-dimensional Logistic-Adjusted Sine Map (2D-LASM) to each share. This method is called Chaotic Encryption-based PVSSM. In this paper, we aim to present how Chaotic Encryption-based PVSSM is applied to color images. In order to assess the efficiency of this method, histogram analysis, data loss attack, salt-pepper noise attack, differential attack, chi-square analysis and correlation analysis tests were applied. The performance of this method has been evaluated according to NCPR, UACI, PSNR, SSIM and CQM. The proposed method achieved a good test values and showed better results compared to similar studies in literature.


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How to Cite

Yildizhan, A., & Topaloglu, N. (2019). Chaotic Encryption and Privilege Based Visual Secret Sharing Model for Color Images. COMPUTING AND INFORMATICS, 38(3), 701–727.