An extended secret sharing scheme for colour images with fixed pixel expansion
by Rabia Sirhindi, Mehreen Afzal, Saeed Murtaza
International Journal of Electronic Security and Digital Forensics (IJESDF), Vol. 2, No. 1, 2009

Abstract: An extended visual secret sharing scheme uses multiple innocent-looking cover images to hide a secret image such that none discloses any portion of the secret. In this article, an extended secret sharing technique is proposed that shares a secret colour image in a couple of significant images using a fixed pixel expansion factor of 9 for a colour space as large as comprising 2²⁴, i.e. 16 million colours approximately. Furthermore, the data hiding technique employed in this article uses all three planes of a colour image which reduces the number of cover images that would otherwise be needed. Recovery is performed through a simple stacking (XOR) operation and a sequence of random integers.

Online publication date: Tue, 17-Mar-2009

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