Abstract
With visual cryptography in mind, the security property of a new scheme is always one of main concerns. However, the ideal security is not taken into account in some visual cryptography schemes sharing multiple secrets. In this paper, the security of a multi-secret visual cryptography scheme proposed by Feng et al. is analyzed. We show that the security of their scheme is not ideal. Precisely, it is insecure since some information of the secret images can be inferred by block attacking the second share alone. In order to realize the ideal security, we redesign the visual patterns and the rule of random permutation. Moreover, the proposed ideal secure scheme has better pixel expansion and relative difference. Finally, we give some experimental results and comparisons to show the effectiveness of the proposed scheme.
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Fu, Zx., Yu, B. (2014). Ideal Secure Multi-Secret Visual Cryptography Scheme with Ring Shares. In: Shi, Y.Q., Liu, F., Yan, W. (eds) Transactions on Data Hiding and Multimedia Security IX. Lecture Notes in Computer Science, vol 8363. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-55046-1_3
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DOI: https://doi.org/10.1007/978-3-642-55046-1_3
Publisher Name: Springer, Berlin, Heidelberg
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