Near-optimal pitch of a moiré grating in dynamic visual cryptography

Dynamic visual cryptography (DVC) is a technique for the encryption and decryption of visual secret information. The confidential visual information in DVC is concealed embedding the secret image into the regular moire grating. The secret can be perceived from the cover image if only the cover image is oscillated according to a predefined law of motion and time-averaging techniques are used. The security of the encryption procedure and the quality of the decrypted image depend on the proper preselection of the pitches of a moire grating used in the encryption stage. This paper presents the main principles of the determination of near-optimal pair of the pitches of moire grating as well as graphical schemes and analytical equations in case of harmonic and chaotic oscillations.

[1]  Ran-Zan Wang,et al.  Sharing multiple secrets in visual cryptography , 2007, Pattern Recognit..

[2]  Minvydas Ragulskis,et al.  Applicability of time-average moiré techniques for chaotic oscillations. , 2007, Physical review. E, Statistical, nonlinear, and soft matter physics.

[3]  Krzysztof Patorski,et al.  Handbook of the moiré fringe technique , 1993 .

[4]  張兆源,et al.  彩色影像視覺密碼之製作; Visual Cryptography for Color Images , 2000 .

[5]  Xiaobo Li,et al.  Probabilistic visual secret sharing schemes for grey-scale images and color images , 2007, Inf. Sci..

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

[7]  Ching-Nung Yang,et al.  Natural language letter based visual cryptography scheme , 2013, J. Vis. Commun. Image Represent..

[8]  Loreta Saunoriene,et al.  Application of dynamic visual cryptography for optical control of chaotic oscillations , 2017 .

[9]  Eric R. Verheul,et al.  Constructions and Properties of k out of n Visual Secret Sharing Schemes , 1997, Des. Codes Cryptogr..

[10]  Guangqing Lu,et al.  Optical image hiding based on chaotic vibration of deformable moiré grating , 2018 .

[11]  Loreta Saunoriene,et al.  Near-optimal pitch of a moiré grating for image hiding applications in dynamic visual cryptography , 2017 .

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

[13]  Minvydas Ragulskis,et al.  Image hiding based on time-averaging moiré , 2009 .

[14]  Gwoboa Horng,et al.  Cheating in Visual Cryptography , 2006, Des. Codes Cryptogr..

[15]  Minvydas Ragulskis,et al.  The structure of moiré grating lines and its influence to time-averaged fringes , 2009 .

[16]  Ran-Zan Wang,et al.  Prevention of cheating in visual cryptography by using coherent patterns , 2015, Inf. Sci..