Abstract
Visual cryptography is a type of secret sharing which encodes a secret image into several shadow images in such a way that the stacking of certain images printed on transparencies will reveal the secret. The decryption is done directly by the human visual system without any extra calculations. Most of previous researches essentially handle only binary images, as the underling encoding matrices are all Boolean matrices. For gray-level image, we need to halftone it into binary image before encoding. Although binary image can be used to simulate gray-level image, its visual quality is deteriorated, especially for fine images. The first part of this paper presents a method to provide much more gray-levels than previous schemes, given the same pixel expansion, and thus establishes the visual cryptography scheme suitable for natural images. The second part of this paper presents a visual voting scheme that need no counting process and guarantees anonymity.
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References
Ateniese, G., Blundo, C., De Santis, A., Stinson, D.R.: Visual cryptography for general access structures. Information and Computation 129, 86–106 (1996)
Blundo, C., De Bonis, A., De Santis, A.: Improved schemes for visual cryptography. Designs, Codes and Cryptography 24, 255–278 (2001)
Blundo, C., Cimato, S., De Santis, A.: Visual cryptography schemes with optimal pixel expansion. Theoretical Computer Science 369, 169–182 (2006)
Blundo, C., De Santis, A., Stinson, D.R.: On the contrast in visual cryptography schemes. Journal of Cryptology 12(4), 261–289 (1999)
Cimato, S., De Prisco, R., De Santis, A.: Colored visual cryptography without color darkening. Theoretical Computer Science 374, 261–276 (2007)
Hofmeister, T., Krause, M., Simon, H.U.: Contrast-optimal k out of n secret sharing schemes in visual cryptography. Theoretical Computer Science 240(2), 471–485 (2000)
Hou, Y.C.: Visual cryptography for color images. Pattern Recognition 1773, 1–11 (2003)
Kang, I.K., Arce, G.R., Lee, H.K.: Color extended visual cryptography using error diffusion. IEEE Transactions on Image Processing 20(1), 132–145 (2011)
Knuth, D.E.: The Art of Computer Programming. Sorting and Searching, vol. 3. Addison-Wesley (1998)
Liu, F., Wu, C.K.: Embedded extended visual cryptography schemes. IEEE Transactions on Information Forensics & Security 6(2), 307–322 (2011)
Liu, F., Wu, C.K., Lin, X.J.: Colour visual cryptography schemes. IET Information Security 2, 151–165 (2008)
Liu, F., Wu, C.K., Lin, X.J.: The alignment problem of visual cryptography schemes. Designs, Codes and Cryptography 50, 215–227 (2009)
Nakajima, M., Yamaguchi, Y.: Extended visual cryptography for natural images. In: WSCG Conference 2002, pp. 303–412 (2002)
Naor, M., Shamir, A.: Visual cryptography. In: De Santis, A. (ed.) EUROCRYPT 1994. LNCS, vol. 950, pp. 1–12. Springer, Heidelberg (1995)
Shyu, S.J., Chen, M.C.: Optimum pixel expansions for threshold visual secret sharing schemes. IEEE Transactions on Information Forensics and Security 6(3), 960–969 (2011)
Wang, D.S., Dong, L., Li, X.B.: Towards shift tolerant visual secret sharing schemes. IEEE Transactions on Information Forensics and Security 6(2), 323–337 (2011)
Wang, Z.M., Arce, G.R., Di Crescenzo, G.: Halftone visual cryptography via error diffusion. IEEE Transactions on Information Forensics and Security 4(3), 383–396 (2009)
Zhou, Z., Arce, G.R., Di Crescenzo, G.: Halftone visual cryptography. IEEE Transactions on Image Processing 15(8), 2441–2453 (2006)
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Guo, T., Liu, F., Wu, C. (2013). Visual Cryptography for Natural Images and Visual Voting. In: Kutyłowski, M., Yung, M. (eds) Information Security and Cryptology. Inscrypt 2012. Lecture Notes in Computer Science, vol 7763. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-38519-3_7
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DOI: https://doi.org/10.1007/978-3-642-38519-3_7
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