An Extended Secret Sharing Scheme for Color Images with Fixed Pixel Expansion

Sirhindi, Rabia; Afzal, Mehreen; Murtaza, Saeed

doi:10.1007/978-3-540-69403-8_11

Cited by 1 publication

(2 citation statements)

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“…The basic concept of visual cryptography proposed in [1] is applicable to black and white images. A number of extensions have been proposed, though, which also deal with grayscale and color images [3,4,5,8]. In addition, schemes have been developed that share and hide a secret image in multiple significant cover images [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…A number of extensions have been proposed, though, which also deal with grayscale and color images [3,4,5,8]. In addition, schemes have been developed that share and hide a secret image in multiple significant cover images [6,7,8]. The shares are, thus, camouflaged in meaningful but innocentlooking cover images possessing no trace of the original secret information.…”

Section: Introductionmentioning

confidence: 99%

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Improved Data Hiding Technique for Shares in Extended Visual Secret Sharing Schemes

Sirhindi

Murtaza

Afzal

2008

Information and Communications Security

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An improved data hiding technique is proposed in this paper to hide the shares of a secret image in an Extended Visual Secret Sharing (EVSS) scheme. It is based on Least Significant Bit (LSB) substitution with a little modification that the embedding capacity varies with each pixel of the host image and depends upon the surrounding pixels' color difference. This not only increases the embedding capacity of the host image as compared to simple LSB substitution but also yields high Peak Signal to Noise Ratio (PSNR) values for host and stego images. Moreover, results indicate that the proposed data hiding process improves the security of camouflage images in EVSS schemes since shares are completely hidden in the cover images without any trace of their presence, unlike most of the previous share hiding approaches, thus preventing shares from alteration during transmission.

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