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

Journal of Vibroengineering

Jurate Ragulskiene¹  Loreta Saunoriene¹  Sandra Aleksiene¹  Vilma Petrauskiene¹ 

[1] Centre for Nonlinear Systems, Department of Mathematical Modelling, Kaunas University of Technology, Kaunas, Lithuania;

关键词: dynamic visual cryptography;    near-optimal moiré grating;    harmonic oscillation;    chaotic oscillation;   

DOI  :  10.21595/jve.2018.20189

来源: DOAJ

【 摘 要 】

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 moiré 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 moiré grating used in the encryption stage. This paper presents the main principles of the determination of near-optimal pair of the pitches of moiré grating as well as graphical schemes and analytical equations in case of harmonic and chaotic oscillations.

【 授权许可】

Unknown