Extended Visual Cryptography Scheme for color images with no pixel expansion

A k-out-of-n Extended Visual Cryptography Scheme (EVCS) is a secret sharing scheme which hides a secret image into n shares, which are also some images. The secret image can be recovered if at least k of the shares are superimposed, while nothing can be obtained if less than k shares are known. Previous EVCS schemes are either for black-and-white images or having pixel expansion. In this paper, we propose the first k-out-of-n EVCS for color images with no pixel expansion. The scheme also improves the contrast of the n shares and the reconstructed secret image (i.e. the superimposed image of any k or more shares) by allowing users to specify the level of each primary color (i.e. Red, Green and Blue) in the image shares as well as the reconstructed secret image.

[1]  Adi Shamir,et al.  How to share a secret , 1979, CACM.

[2]  Alfredo De Santis,et al.  Contrast Optimal Threshold Visual Cryptography Schemes , 2003, SIAM J. Discret. Math..

[3]  Moni Naor,et al.  Visual Cryptography II: Improving the Contrast Via the Cover Base , 1996, Security Protocols Workshop.

[4]  Douglas R. Stinson,et al.  Threshold Visual Cryptography Schemes with Specified Whiteness Levels of Reconstructed Pixels , 2002, Des. Codes Cryptogr..

[5]  Stelvio Cimato,et al.  Colored visual cryptography without color darkening , 2004, Theor. Comput. Sci..

[6]  Mikio Kano,et al.  Visual Secret Sharing Schemes with Cyclic Access Structure for Many Images , 2008, ICISC.

[7]  Young-Chang Hou,et al.  Visual cryptography for color images , 2003, Pattern Recognit..

[8]  Ching-Nung Yang,et al.  Reduce shadow size in aspect ratio invariant visual secret sharing schemes using a square block-wise operation , 2006, Pattern Recognition.

[9]  Ching-Nung Yang,et al.  Colored visual cryptography scheme based on additive color mixing , 2008, Pattern Recognit..

[10]  Ching-Nung Yang,et al.  New visual secret sharing schemes using probabilistic method , 2004, Pattern Recognit. Lett..

[11]  Moni Naor,et al.  Visual Cryptography , 1994, Encyclopedia of Multimedia.

[12]  Alfredo De Santis,et al.  Visual cryptography schemes with perfect reconstruction of black pixels , 1998, Comput. Graph..

[13]  Mehreen Afzal,et al.  An extended secret sharing scheme for colour images with fixed pixel expansion , 2009, Int. J. Electron. Secur. Digit. Forensics.

[14]  Stelvio Cimato,et al.  Ideal contrast visual cryptography schemes with reversing , 2005, Inf. Process. Lett..

[15]  Yen-Ping Chu,et al.  A multiple-level visual secret-sharing scheme without image size expansion , 2007, Inf. Sci..

[16]  Alfredo De Santis,et al.  Visual Cryptography for General Access Structures , 1996, Inf. Comput..

[17]  Xiaobo Li,et al.  On general construction for extended visual cryptography schemes , 2009, Pattern Recognit..

[18]  Yasushi Yamaguchi,et al.  Extended Visual Cryptography for Natural Images , 2002, WSCG.

[19]  Alfredo De Santis,et al.  On the Contrast in Visual Cryptography Schemes , 1999, Journal of Cryptology.

[20]  Rastislav Lukac,et al.  A cost-effective encryption scheme for color images , 2005, Real Time Imaging.

[21]  Bimal K. Roy,et al.  A New Black and White Visual Cryptographic Scheme for General Access Structures , 2004, INDOCRYPT.

[22]  Duncan S. Wong,et al.  On the security of a visual cryptography scheme for color images , 2009, Pattern Recognit..

[23]  Alfredo De Santis,et al.  Extended capabilities for visual cryptography , 2001, Theor. Comput. Sci..

[24]  Shyong Jian Shyu,et al.  Efficient visual secret sharing scheme for color images , 2006, Pattern Recognit..

[25]  Young-Chang Hou,et al.  A Visual Cryptographic Technicque for Chromatic Images Using Multi-Pixel Encoding Method , 2005, J. Res. Pract. Inf. Technol..