1. Multi – pixel prvc encoding scheme using dynamic access control construction in visual cryptography
Authors : Ch.ratna Babu, Dr. B.raveendra Babu
Pages : 45-51
DOI : http://dx.doi.org/10.21172/1.94.08
Keywords : Shares, Secret Sharing, Pixel expansion, Threshold, Access control structure, DACC, PRVC Abstract :Visual Secret Sharing (VSS) techniques are introduced to manage visual information security in the visual cyber world. Visual secret sharing schemes are new visual cryptographic systems, which allows secret sharing information to be encoded in such a way that deciphering can be achieved through the human visual system (HVS), without using the computer. Single pixel encoding method in which only one pixel can be encrypted at each encoding run. But the encoding efficiency is very low for such methods. Multi-pixel encoding is an evolving scheme in visual cryptography for that it can scramble more than one pixel for each scrambling run. It takes the secret image and perceives a pixel chunk with as many pixels as possible to encrypt for each run. A pixel chunk comprises of consecutive pixels of same type for the encrypting. The proposed scheme brings advantage for the encoding efficiency over single pixel encoding and other known multi-pixel encoding methods. This paper presents a novel multi-pixel encoding scheme using access control structure. Furthermore, this scheme can work very well for general access structure and also for gray-scale images without pixel expansion. The outputs of this scheme establish that it can achieve good quality for overlapped images.
Citing this Journal Article :Ch.ratna Babu, Dr. B.raveendra Babu, "Multi – pixel prvc encoding scheme using dynamic access control construction in visual cryptography ", Volume 9 Issue 4 - February 2018, 45-51
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