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Sharing Secrets and Reversibly Reconstructing the Cover Image Using Two Meaningful Shadows

2009 Fifth International Conference on Intelligent Information Hiding and Multimedia Signal Processing, 2009
This paper proposes a data hiding method by secret sharing. The proposed method embeds a k-bit secret digit in a secret message (i.e., a bit stream, a secret image) into a cover pixel of a grayscale cover image at a time by generating two shadow pixels. The two shadow images produced by the proposed scheme are meaningful.
The Duc Kieu +3 more
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The Health Shadow Price and Economically Meaningful Threshold Values

2017
In this chapter we make clear the importance of an economically meaningful threshold value reflecting opportunity costs (best alternative actions) for optimising budget-constrained societal decision making across research, reimbursement and regulatory processes.
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The roles of shadow of the past and future in driving new product novelty and meaningfulness within coopetitive collaborations